Merge branch 'master' into hide-container-impl

34 files changed, 1206 insertions, 191 deletions

diff --git a/appveyor.yml b/appveyor.yml
index 2d6135c7a2..30b7947da0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -9,6 +9,8 @@ matrix:
   allow_failures:
     - configuration: MINGW_64-gcov
 install: []
+before_build:
+- ps: Install-Product node 8
 build_script:
 - call ci\build.bat
 cache:
diff --git a/ci/before_install.sh b/ci/before_install.sh
index f84ad935bc..f5a57ad657 100755
--- a/ci/before_install.sh
+++ b/ci/before_install.sh
@@ -37,3 +37,15 @@ else
   # https://github.com/travis-ci/travis-ci/issues/8363
   pip3 -q install --user --upgrade pip || true
 fi
+
+if [[ "${TRAVIS_OS_NAME}" == linux ]]; then
+  echo "Install node (LTS)"
+
+  if [ ! -f ~/.nvm/nvm.sh ]; then
+    curl -o ~/.nvm/nvm.sh https://raw.githubusercontent.com/creationix/nvm/master/nvm.sh
+  fi
+
+  source ~/.nvm/nvm.sh
+  nvm install --lts
+  nvm use --lts
+fi
diff --git a/ci/build.bat b/ci/build.bat
index 25f949b5e4..9909d102a4 100644
--- a/ci/build.bat
+++ b/ci/build.bat
@@ -37,6 +37,9 @@ set PATH=C:\Ruby24\bin;%PATH%
 cmd /c gem.cmd install neovim || goto :error
 where.exe neovim-ruby-host.bat || goto :error
 
+cmd /c npm.cmd install -g neovim || goto :error
+where.exe neovim-node-host.cmd || goto :error
+
 mkdir .deps
 cd .deps
 cmake -G "MinGW Makefiles" -DCMAKE_BUILD_TYPE=RelWithDebInfo ..\third-party\ || goto :error
diff --git a/ci/install.sh b/ci/install.sh
index c8a0c8825d..2fe4f88822 100755
--- a/ci/install.sh
+++ b/ci/install.sh
@@ -23,3 +23,8 @@ CC=cc pip3 -q install --user --upgrade neovim || true
 
 echo "Install neovim RubyGem."
 gem install --no-document --version ">= 0.2.0" neovim
+
+if [[ "${TRAVIS_OS_NAME}" == linux ]]; then
+  echo "Install neovim npm package"
+  npm install -g neovim
+fi
diff --git a/runtime/autoload/health/provider.vim b/runtime/autoload/health/provider.vim
index 0201ed8062..39e592c471 100644
--- a/runtime/autoload/health/provider.vim
+++ b/runtime/autoload/health/provider.vim
@@ -253,14 +253,18 @@ function! s:check_python(version) abort
 
   if !empty(pyenv)
     if empty(pyenv_root)
-      call health#report_warn(
-            \ 'pyenv was found, but $PYENV_ROOT is not set.',
-            \ ['Did you follow the final install instructions?',
-            \  'If you use a shell "framework" like Prezto or Oh My Zsh, try without.',
-            \  'Try a different shell (bash).']
+      call health#report_info(
+            \ 'pyenv was found, but $PYENV_ROOT is not set. `pyenv root` will be used.'
+            \ .' If you run into problems, try setting $PYENV_ROOT explicitly.'
             \ )
+      let pyenv_root = s:trim(s:system([pyenv, 'root']))
+    endif
+
+    if !isdirectory(pyenv_root)
+      call health#report_error('Invalid pyenv root: '.pyenv_root)
     else
-      call health#report_ok(printf('pyenv found: "%s"', pyenv))
+      call health#report_info(printf('pyenv: %s', pyenv))
+      call health#report_info(printf('pyenv root: %s', pyenv_root))
     endif
   endif
 
@@ -451,10 +455,11 @@ function! s:check_ruby() abort
 
   let host = provider#ruby#Detect()
   if empty(host)
-    call health#report_warn('Missing "neovim" gem.',
-          \ ['Run in shell: gem install neovim',
-          \  'Is the gem bin directory in $PATH? Check `gem environment`.',
-          \  'If you are using rvm/rbenv/chruby, try "rehashing".'])
+    call health#report_warn("`neovim-ruby-host` not found.",
+          \ ['Run `gem install neovim` to ensure the neovim RubyGem is installed.',
+          \  'Run `gem environment` to ensure the gem bin directory is in $PATH.',
+          \  'If you are using rvm/rbenv/chruby, try "rehashing".',
+          \  'See :help g:ruby_host_prog for non-standard gem installations.'])
     return
   endif
   call health#report_info('Host: '. host)
@@ -488,7 +493,7 @@ function! s:check_ruby() abort
 endfunction
 
 function! s:check_node() abort
-  call health#report_start('Node provider (optional)')
+  call health#report_start('Node.js provider (optional)')
 
   let loaded_var = 'g:loaded_node_provider'
   if exists(loaded_var) && !exists('*provider#node#Call')
@@ -502,7 +507,16 @@ function! s:check_node() abort
           \ ['Install Node.js and verify that `node` and `npm` commands work.'])
     return
   endif
-  call health#report_info('Node: '. s:system('node -v'))
+  let node_v = get(split(s:system('node -v'), "\n"), 0, '')
+  call health#report_info('Node.js: '. node_v)
+  if !s:shell_error && s:version_cmp(node_v[1:], '6.0.0') < 0
+    call health#report_warn('Neovim node.js host does not support '.node_v)
+    " Skip further checks, they are nonsense if nodejs is too old.
+    return
+  endif
+  if !provider#node#can_inspect()
+    call health#report_warn('node.js on this system does not support --inspect-brk so $NVIM_NODE_HOST_DEBUG is ignored.')
+  endif
 
   let host = provider#node#Detect()
   if empty(host)
@@ -511,7 +525,7 @@ function! s:check_node() abort
           \  'Is the npm bin directory in $PATH?'])
     return
   endif
-  call health#report_info('Host: '. host)
+  call health#report_info('Neovim node.js host: '. host)
 
   let latest_npm_cmd = has('win32') ? 'cmd /c npm info neovim --json' : 'npm info neovim --json'
   let latest_npm = s:system(split(latest_npm_cmd))
@@ -530,11 +544,11 @@ function! s:check_node() abort
     let latest_npm = get(get(pkg_data, 'dist-tags', {}), 'latest', 'unable to parse')
   endif
 
-  let current_npm_cmd = host .' --version'
+  let current_npm_cmd = ['node', host, '--version']
   let current_npm = s:system(current_npm_cmd)
   if s:shell_error
-    call health#report_error('Failed to run: '. current_npm_cmd,
-          \ ['Report this issue with the output of: ', current_npm_cmd])
+    call health#report_error('Failed to run: '. string(current_npm_cmd),
+          \ ['Report this issue with the output of: ', string(current_npm_cmd)])
     return
   endif
 
@@ -544,7 +558,7 @@ function! s:check_node() abort
           \ current_npm, latest_npm),
           \ ['Run in shell: npm update neovim'])
   else
-    call health#report_ok('Latest "neovim" npm is installed: '. current_npm)
+    call health#report_ok('Latest "neovim" npm package is installed: '. current_npm)
   endif
 endfunction
 
diff --git a/runtime/autoload/provider/node.vim b/runtime/autoload/provider/node.vim
index b08ad4f316..4e737fb51c 100644
--- a/runtime/autoload/provider/node.vim
+++ b/runtime/autoload/provider/node.vim
@@ -5,11 +5,56 @@ let g:loaded_node_provider = 1
 
 let s:job_opts = {'rpc': v:true, 'on_stderr': function('provider#stderr_collector')}
 
+function! s:is_minimum_version(version, min_major, min_minor) abort
+  if empty(a:version)
+    let nodejs_version = get(split(system(['node', '-v']), "\n"), 0, '')
+    if v:shell_error || nodejs_version[0] !=# 'v'
+      return 0
+    endif
+  else
+    let nodejs_version = a:version
+  endif
+  " Remove surrounding junk.  Example: 'v4.12.0' => '4.12.0'
+  let nodejs_version = matchstr(nodejs_version, '\(\d\.\?\)\+')
+  " [major, minor, patch]
+  let v_list = split(nodejs_version, '\.')
+  return len(v_list) == 3
+    \ && ((str2nr(v_list[0]) > str2nr(a:min_major))
+    \     || (str2nr(v_list[0]) == str2nr(a:min_major)
+    \         && str2nr(v_list[1]) >= str2nr(a:min_minor)))
+endfunction
+
+" Support for --inspect-brk requires node 6.12+ or 7.6+ or 8+
+" Return 1 if it is supported
+" Return 0 otherwise
+function! provider#node#can_inspect() abort
+  if !executable('node')
+    return 0
+  endif
+  let ver = get(split(system(['node', '-v']), "\n"), 0, '')
+  if v:shell_error || ver[0] !=# 'v'
+    return 0
+  endif
+  return (ver[1] ==# '6' && s:is_minimum_version(ver, 6, 12))
+    \ || s:is_minimum_version(ver, 7, 6)
+endfunction
+
 function! provider#node#Detect() abort
-  return has('win32') ? exepath('neovim-node-host.cmd') : exepath('neovim-node-host')
+  let global_modules = get(split(system('npm root -g'), "\n"), 0, '')
+  if v:shell_error || !isdirectory(global_modules)
+    return ''
+  endif
+  if !s:is_minimum_version(v:null, 6, 0)
+    return ''
+  endif
+  let entry_point = glob(global_modules . '/neovim/bin/cli.js')
+  if !filereadable(entry_point)
+    return ''
+  endif
+  return entry_point
 endfunction
 
-function! provider#node#Prog()
+function! provider#node#Prog() abort
   return s:prog
 endfunction
 
@@ -19,18 +64,14 @@ function! provider#node#Require(host) abort
     return
   endif
 
-  if has('win32')
-    let args = provider#node#Prog()
-  else
-    let args = ['node']
-
-    if !empty($NVIM_NODE_HOST_DEBUG)
-      call add(args, '--inspect-brk')
-    endif
+  let args = ['node']
 
-    call add(args , provider#node#Prog())
+  if !empty($NVIM_NODE_HOST_DEBUG) && provider#node#can_inspect()
+    call add(args, '--inspect-brk')
   endif
 
+  call add(args, provider#node#Prog())
+
   try
     let channel_id = jobstart(args, s:job_opts)
     if rpcrequest(channel_id, 'poll') ==# 'ok'
@@ -49,7 +90,7 @@ function! provider#node#Require(host) abort
   throw remote#host#LoadErrorForHost(a:host.orig_name, '$NVIM_NODE_LOG_FILE')
 endfunction
 
-function! provider#node#Call(method, args)
+function! provider#node#Call(method, args) abort
   if s:err != ''
     echoerr s:err
     return
diff --git a/runtime/autoload/provider/python.vim b/runtime/autoload/provider/python.vim
index 81fe194cb9..a06cbe4814 100644
--- a/runtime/autoload/provider/python.vim
+++ b/runtime/autoload/provider/python.vim
@@ -11,11 +11,11 @@ let g:loaded_python_provider = 1
 
 let [s:prog, s:err] = provider#pythonx#Detect(2)
 
-function! provider#python#Prog()
+function! provider#python#Prog() abort
   return s:prog
 endfunction
 
-function! provider#python#Error()
+function! provider#python#Error() abort
   return s:err
 endfunction
 
@@ -29,7 +29,7 @@ endif
 call remote#host#RegisterClone('legacy-python-provider', 'python')
 call remote#host#RegisterPlugin('legacy-python-provider', 'script_host.py', [])
 
-function! provider#python#Call(method, args)
+function! provider#python#Call(method, args) abort
   if s:err != ''
     return
   endif
diff --git a/runtime/autoload/provider/python3.vim b/runtime/autoload/provider/python3.vim
index 0c3b75b73d..242a224cb3 100644
--- a/runtime/autoload/provider/python3.vim
+++ b/runtime/autoload/provider/python3.vim
@@ -11,11 +11,11 @@ let g:loaded_python3_provider = 1
 
 let [s:prog, s:err] = provider#pythonx#Detect(3)
 
-function! provider#python3#Prog()
+function! provider#python3#Prog() abort
   return s:prog
 endfunction
 
-function! provider#python3#Error()
+function! provider#python3#Error() abort
   return s:err
 endfunction
 
@@ -29,7 +29,7 @@ endif
 call remote#host#RegisterClone('legacy-python3-provider', 'python3')
 call remote#host#RegisterPlugin('legacy-python3-provider', 'script_host.py', [])
 
-function! provider#python3#Call(method, args)
+function! provider#python3#Call(method, args) abort
   if s:err != ''
     return
   endif
diff --git a/runtime/autoload/provider/ruby.vim b/runtime/autoload/provider/ruby.vim
index da73a0dfc0..3fb65fecdf 100644
--- a/runtime/autoload/provider/ruby.vim
+++ b/runtime/autoload/provider/ruby.vim
@@ -7,7 +7,7 @@ let g:loaded_ruby_provider = 1
 let s:stderr = {}
 let s:job_opts = {'rpc': v:true}
 
-function! s:job_opts.on_stderr(chan_id, data, event)
+function! s:job_opts.on_stderr(chan_id, data, event) abort
   let stderr = get(s:stderr, a:chan_id, [''])
   let last = remove(stderr, -1)
   let a:data[0] = last.a:data[0]
@@ -23,7 +23,7 @@ function! provider#ruby#Detect() abort
   end
 endfunction
 
-function! provider#ruby#Prog()
+function! provider#ruby#Prog() abort
   return s:prog
 endfunction
 
@@ -50,7 +50,7 @@ function! provider#ruby#Require(host) abort
   throw remote#host#LoadErrorForHost(a:host.orig_name, '$NVIM_RUBY_LOG_FILE')
 endfunction
 
-function! provider#ruby#Call(method, args)
+function! provider#ruby#Call(method, args) abort
   if s:err != ''
     echoerr s:err
     return
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 6c3fd43db0..a9474b58a3 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -6845,6 +6845,7 @@ setqflist({list} [, {action}[, {what}]])		*setqflist()*
 		    nr		error number
 		    text	description of the error
 		    type	single-character error type, 'E', 'W', etc.
+		    valid	recognized error message
 
 		The "col", "vcol", "nr", "type" and "text" entries are
 		optional.  Either "lnum" or "pattern" entry can be used to
@@ -6854,21 +6855,26 @@ setqflist({list} [, {action}[, {what}]])		*setqflist()*
 		item will not be handled as an error line.
 		If both "pattern" and "lnum" are present then "pattern" will
 		be used.
+		If the "valid" entry is not supplied, then the valid flag is
+		set when "bufnr" is a valid buffer or "filename" exists.
 		If you supply an empty {list}, the quickfix list will be
 		cleared.
 		Note that the list is not exactly the same as what
 		|getqflist()| returns.
 
-							*E927*
-		If {action} is set to 'a', then the items from {list} are
-		added to the existing quickfix list. If there is no existing
-		list, then a new list is created.
+		{action} values:				*E927*
+		'a'	The items from {list} are added to the existing
+			quickfix list. If there is no existing list, then a
+			new list is created.
 		
-		If {action} is set to 'r', then the items from the current
-		quickfix list are replaced with the items from {list}.  This
-		can also be used to clear the list: >
-			:call setqflist([], 'r')
+		'r'	The items from the current quickfix list are replaced
+			with the items from {list}.  This can also be used to
+			clear the list: >
+				:call setqflist([], 'r')
 <	
+		'f'	All the quickfix lists in the quickfix stack are
+			freed.
+
 		If {action} is not present or is set to ' ', then a new list
 		is created.
 
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index d3072d83e2..f70ec32bd8 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -3809,6 +3809,23 @@ A jump table for the options with a short description can be found at |Q_op|.
 	This option cannot be set from a |modeline| or in the |sandbox|, for
 	security reasons.
 
+					*'makeencoding'* *'menc'*
+'makeencoding' 'menc'	string	(default "")
+			global or local to buffer |global-local|
+			{only available when compiled with the |+multi_byte|
+			feature}
+			{not in Vi}
+	Encoding used for reading the output of external commands.  When empty,
+	encoding is not converted.
+	This is used for `:make`, `:lmake`, `:grep`, `:lgrep`, `:grepadd`,
+	`:lgrepadd`, `:cfile`, `:cgetfile`, `:caddfile`, `:lfile`, `:lgetfile`,
+	and `:laddfile`.
+
+	This would be mostly useful when you use MS-Windows.  If |+iconv| is
+	enabled and GNU libiconv is used, setting 'makeencoding' to "char" has
+	the same effect as setting to the system locale encoding.  Example: >
+		:set makeencoding=char	" system locale is used
+<
 						*'makeprg'* *'mp'*
 'makeprg' 'mp'		string	(default "make")
 			global or local to buffer |global-local|
diff --git a/runtime/doc/quickfix.txt b/runtime/doc/quickfix.txt
index da167c0f5b..74f82b2c65 100644
--- a/runtime/doc/quickfix.txt
+++ b/runtime/doc/quickfix.txt
@@ -165,6 +165,9 @@ processing a quickfix or location list command, it will be aborted.
 			keep Vim running while compiling.  If you give the
 			name of the errorfile, the 'errorfile' option will
 			be set to [errorfile].  See |:cc| for [!].
+			If the encoding of the error file differs from the
+			'encoding' option, you can use the 'makeencoding'
+			option to specify the encoding.
 
 							*:lf* *:lfile*
 :lf[ile][!] [errorfile]	Same as ":cfile", except the location list for the
@@ -176,6 +179,9 @@ processing a quickfix or location list command, it will be aborted.
 :cg[etfile] [errorfile]					*:cg* *:cgetfile*
 			Read the error file.  Just like ":cfile" but don't
 			jump to the first error.
+			If the encoding of the error file differs from the
+			'encoding' option, you can use the 'makeencoding'
+			option to specify the encoding.
 
 
 :lg[etfile] [errorfile]					*:lg* *:lgetfile*
@@ -186,6 +192,9 @@ processing a quickfix or location list command, it will be aborted.
 :caddf[ile] [errorfile]	Read the error file and add the errors from the
 			errorfile to the current quickfix list. If a quickfix
 			list is not present, then a new list is created.
+			If the encoding of the error file differs from the
+			'encoding' option, you can use the 'makeencoding'
+			option to specify the encoding.
 
 							*:laddf* *:laddfile*
 :laddf[ile] [errorfile]	Same as ":caddfile", except the location list for the
@@ -322,6 +331,7 @@ use this code: >
 	endfunction
 
 	au QuickfixCmdPost make call QfMakeConv()
+Another option is using 'makeencoding'.
 
 EXECUTE A COMMAND IN ALL THE BUFFERS IN QUICKFIX OR LOCATION LIST:
 							*:cdo*
@@ -586,6 +596,9 @@ lists, use ":cnewer 99" first.
 			   like |:cnext| and |:cprevious|, see above.
 			This command does not accept a comment, any "
 			characters are considered part of the arguments.
+			If the encoding of the program output differs from the
+			'encoding' option, you can use the 'makeencoding'
+			option to specify the encoding.
 
 							*:lmak* *:lmake*
 :lmak[e][!] [arguments]
@@ -645,6 +658,7 @@ read the error messages: >
 	au QuickfixCmdPost make call QfMakeConv()
 
 (Example by Faque Cheng)
+Another option is using 'makeencoding'.
 
 ==============================================================================
 5. Using :vimgrep and :grep				*grep* *lid*
@@ -759,6 +773,9 @@ id-utils) in a similar way to its compiler integration (see |:make| above).
 			When 'grepprg' is "internal" this works like
 			|:vimgrep|.  Note that the pattern needs to be
 			enclosed in separator characters then.
+			If the encoding of the program output differs from the
+			'encoding' option, you can use the 'makeencoding'
+			option to specify the encoding.
 
 							    *:lgr* *:lgrep*
 :lgr[ep][!] [arguments]	Same as ":grep", except the location list for the
@@ -783,6 +800,10 @@ id-utils) in a similar way to its compiler integration (see |:make| above).
 				  \ | catch /E480:/
 				  \ | endtry"
 <
+			If the encoding of the program output differs from the
+			'encoding' option, you can use the 'makeencoding'
+			option to specify the encoding.
+
 							*:lgrepa* *:lgrepadd*
 :lgrepa[dd][!] [arguments]
 			Same as ":grepadd", except the location list for the
diff --git a/runtime/doc/quickref.txt b/runtime/doc/quickref.txt
index b22d2afa7e..902b0175a2 100644
--- a/runtime/doc/quickref.txt
+++ b/runtime/doc/quickref.txt
@@ -762,6 +762,7 @@ Short explanation of each option:		*option-list*
 'loadplugins'	  'lpl'     load plugin scripts when starting up
 'magic'			    changes special characters in search patterns
 'makeef'	  'mef'     name of the errorfile for ":make"
+'makeencoding'	  'menc'    encoding of external make/grep commands
 'makeprg'	  'mp'	    program to use for the ":make" command
 'matchpairs'	  'mps'     pairs of characters that "%" can match
 'matchtime'	  'mat'     tenths of a second to show matching paren
diff --git a/scripts/vim-patch.sh b/scripts/vim-patch.sh
index 04bc16dd25..530701e223 100755
--- a/scripts/vim-patch.sh
+++ b/scripts/vim-patch.sh
@@ -92,8 +92,11 @@ get_vim_sources() {
 }
 
 commit_message() {
-  printf 'vim-patch:%s\n\n%s\n\n%s' "${vim_version}" \
-    "${vim_message}" "${vim_commit_url}"
+  if [[ -n "$vim_tag" ]]; then
+    printf '%s\n\n%s' "${vim_message}" "${vim_commit_url}"
+  else
+    printf 'vim-patch:%s\n\n%s\n\n%s' "$vim_version" "$vim_message" "$vim_commit_url"
+  fi
 }
 
 find_git_remote() {
@@ -108,22 +111,23 @@ assign_commit_details() {
     vim_tag="v${1}"
     vim_commit=$(cd "${VIM_SOURCE_DIR}" \
       && git log -1 --format="%H" "${vim_tag}")
-    local strip_commit_line=true
+    local munge_commit_line=true
   else
     # Interpret parameter as commit hash.
     vim_version="${1:0:12}"
+    vim_tag=
     vim_commit=$(cd "${VIM_SOURCE_DIR}" \
       && git log -1 --format="%H" "${vim_version}")
-    local strip_commit_line=false
+    local munge_commit_line=false
   fi
 
   vim_commit_url="https://github.com/vim/vim/commit/${vim_commit}"
   vim_message="$(cd "${VIM_SOURCE_DIR}" \
     && git log -1 --pretty='format:%B' "${vim_commit}" \
       | sed -e 's/\(#[0-9]*\)/vim\/vim\1/g')"
-  if [[ ${strip_commit_line} == "true" ]]; then
+  if [[ ${munge_commit_line} == "true" ]]; then
     # Remove first line of commit message.
-    vim_message="$(echo "${vim_message}" | sed -e '1d')"
+    vim_message="$(echo "${vim_message}" | sed -e '1s/^patch /vim-patch:/')"
   fi
   patch_file="vim-${vim_version}.patch"
 }
@@ -286,9 +290,10 @@ submit_pr() {
   local git_remote
   git_remote="$(find_git_remote)"
   local pr_body
-  pr_body="$(git log --reverse --format='#### %s%n%n%b%n' "${git_remote}"/master..HEAD)"
+  pr_body="$(git log --grep=vim-patch --reverse --format='#### %s%n%n%b%n' "${git_remote}"/master..HEAD)"
   local patches
-  patches=("$(git log --reverse --format='%s' "${git_remote}"/master..HEAD)")
+  # Extract just the "vim-patch:X.Y.ZZZZ" or "vim-patch:sha" portion of each log
+  patches=("$(git log --grep=vim-patch --reverse --format='%s' "${git_remote}"/master..HEAD | sed 's/: .*//')")
   patches=(${patches[@]//vim-patch:}) # Remove 'vim-patch:' prefix for each item in array.
   local pr_title="${patches[*]}" # Create space-separated string from array.
   pr_title="${pr_title// /,}" # Replace spaces with commas.
diff --git a/src/.asan-blacklist b/src/.asan-blacklist
index 928d81bd5a..9d7f721a88 100644
--- a/src/.asan-blacklist
+++ b/src/.asan-blacklist
@@ -1,3 +1,7 @@
 # multiqueue.h pointer arithmetic is not accepted by asan
 fun:multiqueue_node_data
 fun:tv_dict_watcher_node_data
+
+# Allocation in loop_schedule_deferred() is freed by loop_deferred_event(), but
+# this sometimes does not happen during teardown.
+func:loop_schedule_deferred
diff --git a/src/nvim/buffer.c b/src/nvim/buffer.c
index 766003a021..21830539f5 100644
--- a/src/nvim/buffer.c
+++ b/src/nvim/buffer.c
@@ -1808,6 +1808,7 @@ void free_buf_options(buf_T *buf, int free_p_ff)
   buf->b_p_ul = NO_LOCAL_UNDOLEVEL;
   clear_string_option(&buf->b_p_lw);
   clear_string_option(&buf->b_p_bkc);
+  clear_string_option(&buf->b_p_menc);
 }
 
 
diff --git a/src/nvim/buffer_defs.h b/src/nvim/buffer_defs.h
index f1cbcb2627..5702ceaaef 100644
--- a/src/nvim/buffer_defs.h
+++ b/src/nvim/buffer_defs.h
@@ -637,6 +637,7 @@ struct file_buffer {
   uint32_t b_p_fex_flags;       ///< flags for 'formatexpr'
   char_u *b_p_kp;               ///< 'keywordprg'
   int b_p_lisp;                 ///< 'lisp'
+  char_u *b_p_menc;             ///< 'makeencoding'
   char_u *b_p_mps;              ///< 'matchpairs'
   int b_p_ml;                   ///< 'modeline'
   int b_p_ml_nobin;             ///< b_p_ml saved for binary mode
diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index 6b04dd4eea..e6cb8cdec0 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -5183,6 +5183,8 @@ bool garbage_collect(bool testing)
     ABORTING(set_ref_list)(sub.additional_elements, copyID);
   }
 
+  ABORTING(set_ref_in_quickfix)(copyID);
+
   bool did_free = false;
   if (!abort) {
     // 2. Free lists and dictionaries that are not referenced.
@@ -14611,7 +14613,8 @@ static void set_qf_ll_list(win_T *wp, typval_T *args, typval_T *rettv)
     return;
   }
   const char *const act = tv_get_string_chk(action_arg);
-  if ((*act == 'a' || *act == 'r' || *act == ' ') && act[1] == NUL) {
+  if ((*act == 'a' || *act == 'r' || *act == ' ' || *act == 'f')
+      && act[1] == NUL) {
     action = *act;
   } else {
     EMSG2(_(e_invact), act);
diff --git a/src/nvim/event/loop.c b/src/nvim/event/loop.c
index 5adf16c0f3..55ef0261d9 100644
--- a/src/nvim/event/loop.c
+++ b/src/nvim/event/loop.c
@@ -30,19 +30,22 @@ void loop_init(Loop *loop, void *data)
   uv_signal_init(&loop->uv, &loop->children_watcher);
   uv_timer_init(&loop->uv, &loop->children_kill_timer);
   uv_timer_init(&loop->uv, &loop->poll_timer);
+  loop->poll_timer.data = xmalloc(sizeof(bool));  // "timeout expired" flag
 }
 
-void loop_poll_events(Loop *loop, int ms)
+/// @returns true if `ms` timeout was reached
+bool loop_poll_events(Loop *loop, int ms)
 {
   if (loop->recursive++) {
     abort();  // Should not re-enter uv_run
   }
 
   uv_run_mode mode = UV_RUN_ONCE;
+  bool timeout_expired = false;
 
   if (ms > 0) {
-    // Use a repeating timeout of ms milliseconds to make sure
-    // we do not block indefinitely for I/O.
+    *((bool *)loop->poll_timer.data) = false;  // reset "timeout expired" flag
+    // Dummy timer to ensure UV_RUN_ONCE does not block indefinitely for I/O.
     uv_timer_start(&loop->poll_timer, timer_cb, (uint64_t)ms, (uint64_t)ms);
   } else if (ms == 0) {
     // For ms == 0, do a non-blocking event poll.
@@ -52,11 +55,13 @@ void loop_poll_events(Loop *loop, int ms)
   uv_run(&loop->uv, mode);
 
   if (ms > 0) {
+    timeout_expired = *((bool *)loop->poll_timer.data);
     uv_timer_stop(&loop->poll_timer);
   }
 
   loop->recursive--;  // Can re-enter uv_run now
   multiqueue_process_events(loop->fast_events);
+  return timeout_expired;
 }
 
 /// Schedules an event from another thread.
@@ -111,7 +116,7 @@ bool loop_close(Loop *loop, bool wait)
   uv_mutex_destroy(&loop->mutex);
   uv_close((uv_handle_t *)&loop->children_watcher, NULL);
   uv_close((uv_handle_t *)&loop->children_kill_timer, NULL);
-  uv_close((uv_handle_t *)&loop->poll_timer, NULL);
+  uv_close((uv_handle_t *)&loop->poll_timer, timer_close_cb);
   uv_close((uv_handle_t *)&loop->async, NULL);
   uint64_t start = wait ? os_hrtime() : 0;
   while (true) {
@@ -163,5 +168,11 @@ static void async_cb(uv_async_t *handle)
 
 static void timer_cb(uv_timer_t *handle)
 {
+  bool *timeout_expired = handle->data;
+  *timeout_expired = true;
 }
 
+static void timer_close_cb(uv_handle_t *handle)
+{
+  xfree(handle->data);
+}
diff --git a/src/nvim/if_cscope.c b/src/nvim/if_cscope.c
index 3c02f5acbd..654b4630c5 100644
--- a/src/nvim/if_cscope.c
+++ b/src/nvim/if_cscope.c
@@ -1012,9 +1012,9 @@ static int cs_find_common(char *opt, char *pat, int forceit, int verbose,
       fclose(f);
       if (use_ll)           /* Use location list */
         wp = curwin;
-      /* '-' starts a new error list */
+      // '-' starts a new error list
       if (qf_init(wp, tmp, (char_u *)"%f%*\\t%l%*\\t%m",
-              *qfpos == '-', cmdline) > 0) {
+                  *qfpos == '-', cmdline, NULL) > 0) {
         if (postponed_split != 0) {
           (void)win_split(postponed_split > 0 ? postponed_split : 0,
                           postponed_split_flags);
diff --git a/src/nvim/main.c b/src/nvim/main.c
index 0346414697..0b24023ad0 100644
--- a/src/nvim/main.c
+++ b/src/nvim/main.c
@@ -1369,7 +1369,7 @@ static void handle_quickfix(mparm_T *paramp)
       set_string_option_direct((char_u *)"ef", -1,
           paramp->use_ef, OPT_FREE, SID_CARG);
     vim_snprintf((char *)IObuff, IOSIZE, "cfile %s", p_ef);
-    if (qf_init(NULL, p_ef, p_efm, true, IObuff) < 0) {
+    if (qf_init(NULL, p_ef, p_efm, true, IObuff, p_menc) < 0) {
       ui_linefeed();
       mch_exit(3);
     }
diff --git a/src/nvim/option.c b/src/nvim/option.c
index a345906200..192d2b0f78 100644
--- a/src/nvim/option.c
+++ b/src/nvim/option.c
@@ -2217,6 +2217,7 @@ void check_buf_options(buf_T *buf)
   check_string_option(&buf->b_p_tsr);
   check_string_option(&buf->b_p_lw);
   check_string_option(&buf->b_p_bkc);
+  check_string_option(&buf->b_p_menc);
 }
 
 /*
@@ -2635,8 +2636,8 @@ did_set_string_option (
   else if (varp == &p_ei) {
     if (check_ei() == FAIL)
       errmsg = e_invarg;
-  /* 'encoding' and 'fileencoding' */
-  } else if (varp == &p_enc || gvarp == &p_fenc) {
+  // 'encoding', 'fileencoding' and 'makeencoding'
+  } else if (varp == &p_enc || gvarp == &p_fenc || gvarp == &p_menc) {
     if (gvarp == &p_fenc) {
       if (!MODIFIABLE(curbuf) && opt_flags != OPT_GLOBAL) {
         errmsg = e_modifiable;
@@ -5400,6 +5401,9 @@ void unset_global_local_option(char *name, void *from)
     case PV_LW:
       clear_string_option(&buf->b_p_lw);
       break;
+    case PV_MENC:
+      clear_string_option(&buf->b_p_menc);
+      break;
   }
 }
 
@@ -5433,6 +5437,7 @@ static char_u *get_varp_scope(vimoption_T *p, int opt_flags)
     case PV_UL:   return (char_u *)&(curbuf->b_p_ul);
     case PV_LW:   return (char_u *)&(curbuf->b_p_lw);
     case PV_BKC:  return (char_u *)&(curbuf->b_p_bkc);
+    case PV_MENC: return (char_u *)&(curbuf->b_p_menc);
     }
     return NULL;     /* "cannot happen" */
   }
@@ -5488,6 +5493,8 @@ static char_u *get_varp(vimoption_T *p)
            ? (char_u *)&(curbuf->b_p_ul) : p->var;
   case PV_LW:   return *curbuf->b_p_lw != NUL
            ? (char_u *)&(curbuf->b_p_lw) : p->var;
+  case PV_MENC: return *curbuf->b_p_menc != NUL
+           ? (char_u *)&(curbuf->b_p_menc) : p->var;
 
   case PV_ARAB:   return (char_u *)&(curwin->w_p_arab);
   case PV_LIST:   return (char_u *)&(curwin->w_p_list);
@@ -5885,6 +5892,7 @@ void buf_copy_options(buf_T *buf, int flags)
       buf->b_p_qe = vim_strsave(p_qe);
       buf->b_p_udf = p_udf;
       buf->b_p_lw = empty_option;
+      buf->b_p_menc = empty_option;
 
       /*
        * Don't copy the options set by ex_help(), use the saved values,
diff --git a/src/nvim/option_defs.h b/src/nvim/option_defs.h
index 1b978137ae..864723a10c 100644
--- a/src/nvim/option_defs.h
+++ b/src/nvim/option_defs.h
@@ -489,6 +489,7 @@ EXTERN char_u   *p_lcs;         // 'listchars'
 EXTERN int p_lz;                // 'lazyredraw'
 EXTERN int p_lpl;               // 'loadplugins'
 EXTERN int p_magic;             // 'magic'
+EXTERN char_u   *p_menc;        // 'makeencoding'
 EXTERN char_u   *p_mef;         // 'makeef'
 EXTERN char_u   *p_mp;          // 'makeprg'
 EXTERN char_u   *p_cc;          // 'colorcolumn'
@@ -736,6 +737,7 @@ enum {
   , BV_KP
   , BV_LISP
   , BV_LW
+  , BV_MENC
   , BV_MA
   , BV_ML
   , BV_MOD
diff --git a/src/nvim/options.lua b/src/nvim/options.lua
index 45efd49391..35baaf948f 100644
--- a/src/nvim/options.lua
+++ b/src/nvim/options.lua
@@ -1457,6 +1457,13 @@ return {
       defaults={if_true={vi=""}}
     },
     {
+      full_name='makeencoding', abbreviation='menc',
+      type='string', scope={'global', 'buffer'},
+      vi_def=true,
+      varname='p_menc',
+      defaults={if_true={vi=""}}
+    },
+    {
       full_name='makeprg', abbreviation='mp',
       type='string', scope={'global', 'buffer'},
       secure=true,
diff --git a/src/nvim/quickfix.c b/src/nvim/quickfix.c
index 7e2193b8bb..f85009dca8 100644
--- a/src/nvim/quickfix.c
+++ b/src/nvim/quickfix.c
@@ -85,6 +85,7 @@ typedef struct qf_list_S {
   int qf_nonevalid;             // TRUE if not a single valid entry found
   char_u      *qf_title;        // title derived from the command that created
                                 // the error list
+  typval_T    *qf_ctx;          // context set by setqflist/setloclist
 } qf_list_T;
 
 struct qf_info_S {
@@ -161,6 +162,7 @@ typedef struct {
   buf_T      *buf;
   linenr_T buflnum;
   linenr_T lnumlast;
+  vimconv_T vc;
 } qfstate_T;
 
 typedef struct {
@@ -194,19 +196,19 @@ typedef struct {
 static char_u *qf_last_bufname = NULL;
 static bufref_T  qf_last_bufref = { NULL, 0, 0 };
 
-/*
- * Read the errorfile "efile" into memory, line by line, building the error
- * list. Set the error list's title to qf_title.
- * Return -1 for error, number of errors for success.
- */
-int 
-qf_init (
-    win_T *wp,
-    char_u *efile,
-    char_u *errorformat,
-    int newlist,                            /* TRUE: start a new error list */
-    char_u *qf_title
-)
+/// Read the errorfile "efile" into memory, line by line, building the error
+/// list. Set the error list's title to qf_title.
+///
+/// @params  wp  If non-NULL, make a location list
+/// @params  efile  If non-NULL, errorfile to parse
+/// @params  errorformat  'errorformat' string used to parse the error lines
+/// @params  newlist  If true, create a new error list
+/// @params  qf_title  If non-NULL, title of the error list
+/// @params  enc  If non-NULL, encoding used to parse errors
+///
+/// @returns -1 for error, number of errors for success.
+int qf_init(win_T *wp, char_u *efile, char_u *errorformat, int newlist,
+            char_u *qf_title, char_u *enc)
 {
   qf_info_T       *qi = &ql_info;
 
@@ -215,8 +217,8 @@ qf_init (
   }
 
   return qf_init_ext(qi, efile, curbuf, NULL, errorformat, newlist,
-      (linenr_T)0, (linenr_T)0,
-      qf_title);
+                     (linenr_T)0, (linenr_T)0,
+                     qf_title, enc);
 }
 
 // Maximum number of bytes allowed per line while reading an errorfile.
@@ -640,6 +642,22 @@ retry:
   } else {
     state->linebuf = IObuff;
   }
+
+  // Convert a line if it contains a non-ASCII character
+  if (state->vc.vc_type != CONV_NONE && has_non_ascii(state->linebuf)) {
+    char_u *line = string_convert(&state->vc, state->linebuf, &state->linelen);
+    if (line != NULL) {
+      if (state->linelen < IOSIZE) {
+        STRLCPY(state->linebuf, line, state->linelen + 1);
+        xfree(line);
+      } else {
+        xfree(state->growbuf);
+        state->linebuf = state->growbuf = line;
+        state->growbufsiz = state->linelen < LINE_MAXLEN
+          ? state->linelen : LINE_MAXLEN;
+      }
+    }
+  }
   return QF_OK;
 }
 
@@ -785,7 +803,7 @@ restofline:
         fields->type = *regmatch.startp[i];
       }
       if (fmt_ptr->flags == '+' && !qi->qf_multiscan) {       // %+
-        if (linelen > fields->errmsglen) {
+        if (linelen >= fields->errmsglen) {
           // linelen + null terminator
           fields->errmsg = xrealloc(fields->errmsg, linelen + 1);
           fields->errmsglen = linelen + 1;
@@ -796,7 +814,7 @@ restofline:
           continue;
         }
         len = (size_t)(regmatch.endp[i] - regmatch.startp[i]);
-        if (len > fields->errmsglen) {
+        if (len >= fields->errmsglen) {
           // len + null terminator
           fields->errmsg = xrealloc(fields->errmsg, len + 1);
           fields->errmsglen = len + 1;
@@ -873,7 +891,7 @@ restofline:
     fields->namebuf[0] = NUL;                // no match found, remove file name
     fields->lnum = 0;                        // don't jump to this line
     fields->valid = false;
-    if (linelen > fields->errmsglen) {
+    if (linelen >= fields->errmsglen) {
       // linelen + null terminator
       fields->errmsg = xrealloc(fields->errmsg, linelen + 1);
       fields->errmsglen = linelen + 1;
@@ -978,15 +996,15 @@ qf_init_ext(
     buf_T *buf,
     typval_T *tv,
     char_u *errorformat,
-    int newlist,                            /* TRUE: start a new error list */
-    linenr_T lnumfirst,                     /* first line number to use */
-    linenr_T lnumlast,                      /* last line number to use */
-    char_u *qf_title
+    int newlist,                            // TRUE: start a new error list
+    linenr_T lnumfirst,                     // first line number to use
+    linenr_T lnumlast,                      // last line number to use
+    char_u *qf_title,
+    char_u *enc
 )
 {
-  qfstate_T state = { NULL, 0, NULL, 0, NULL, NULL, NULL, NULL,
-                      NULL, NULL, 0, 0 };
-  qffields_T fields = { NULL, NULL, 0, 0L, 0, false, NULL, 0, 0, 0 };
+  qfstate_T state;
+  qffields_T fields;
   qfline_T        *old_last = NULL;
   bool adding = false;
   static efm_T    *fmt_first = NULL;
@@ -999,6 +1017,13 @@ qf_init_ext(
   xfree(qf_last_bufname);
   qf_last_bufname = NULL;
 
+  memset(&state, 0, sizeof(state));
+  memset(&fields, 0, sizeof(fields));
+  state.vc.vc_type = CONV_NONE;
+  if (enc != NULL && *enc != NUL) {
+    convert_setup(&state.vc, enc, p_enc);
+  }
+
   fields.namebuf = xmalloc(CMDBUFFSIZE + 1);
   fields.errmsglen = CMDBUFFSIZE + 1;
   fields.errmsg = xmalloc(fields.errmsglen);
@@ -1150,6 +1175,10 @@ qf_init_end:
 
   qf_update_buffer(qi, old_last);
 
+  if (state.vc.vc_type != CONV_NONE) {
+    convert_setup(&state.vc, NULL, NULL);
+  }
+
   return retval;
 }
 
@@ -1384,6 +1413,13 @@ void copy_loclist(win_T *from, win_T *to)
     else
       to_qfl->qf_title = NULL;
 
+    if (from_qfl->qf_ctx != NULL) {
+      to_qfl->qf_ctx = xcalloc(1, sizeof(typval_T));
+      tv_copy(from_qfl->qf_ctx, to_qfl->qf_ctx);
+    } else {
+      to_qfl->qf_ctx = NULL;
+    }
+
     if (from_qfl->qf_count) {
       qfline_T    *from_qfp;
       qfline_T    *prevp;
@@ -2385,12 +2421,21 @@ static void qf_free(qf_info_T *qi, int idx)
   qi->qf_lists[idx].qf_start = NULL;
   qi->qf_lists[idx].qf_ptr = NULL;
   qi->qf_lists[idx].qf_title = NULL;
+  tv_free(qi->qf_lists[idx].qf_ctx);
+  qi->qf_lists[idx].qf_ctx = NULL;
   qi->qf_lists[idx].qf_index = 0;
+  qi->qf_lists[idx].qf_start = NULL;
+  qi->qf_lists[idx].qf_last = NULL;
+  qi->qf_lists[idx].qf_ptr = NULL;
+  qi->qf_lists[idx].qf_nonevalid = true;
 
   qf_clean_dir_stack(&qi->qf_dir_stack);
   qi->qf_directory = NULL;
   qf_clean_dir_stack(&qi->qf_file_stack);
   qi->qf_currfile = NULL;
+  qi->qf_multiline = false;
+  qi->qf_multiignore = false;
+  qi->qf_multiscan = false;
 }
 
 /*
@@ -3027,6 +3072,7 @@ void ex_make(exarg_T *eap)
   qf_info_T   *qi = &ql_info;
   int res;
   char_u      *au_name = NULL;
+  char_u *enc = (*curbuf->b_p_menc != NUL) ? curbuf->b_p_menc : p_menc;
 
   /* Redirect ":grep" to ":vimgrep" if 'grepprg' is "internal". */
   if (grep_internal(eap->cmdidx)) {
@@ -3086,11 +3132,11 @@ void ex_make(exarg_T *eap)
 
   res = qf_init(wp, fname, (eap->cmdidx != CMD_make
                             && eap->cmdidx != CMD_lmake) ? p_gefm : p_efm,
-      (eap->cmdidx != CMD_grepadd
-       && eap->cmdidx != CMD_lgrepadd),
-      *eap->cmdlinep);
-  if (wp != NULL)
+                (eap->cmdidx != CMD_grepadd && eap->cmdidx != CMD_lgrepadd),
+                *eap->cmdlinep, enc);
+  if (wp != NULL) {
     qi = GET_LOC_LIST(wp);
+  }
   if (au_name != NULL) {
     apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
         curbuf->b_fname, TRUE, curbuf);
@@ -3432,19 +3478,18 @@ void ex_cfile(exarg_T *eap)
   if (*eap->arg != NUL)
     set_string_option_direct((char_u *)"ef", -1, eap->arg, OPT_FREE, 0);
 
-  /*
-   * This function is used by the :cfile, :cgetfile and :caddfile
-   * commands.
-   * :cfile always creates a new quickfix list and jumps to the
-   * first error.
-   * :cgetfile creates a new quickfix list but doesn't jump to the
-   * first error.
-   * :caddfile adds to an existing quickfix list. If there is no
-   * quickfix list then a new list is created.
-   */
+  char_u *enc = (*curbuf->b_p_menc != NUL) ? curbuf->b_p_menc : p_menc;
+  // This function is used by the :cfile, :cgetfile and :caddfile
+  // commands.
+  // :cfile always creates a new quickfix list and jumps to the
+  // first error.
+  // :cgetfile creates a new quickfix list but doesn't jump to the
+  // first error.
+  // :caddfile adds to an existing quickfix list. If there is no
+  // quickfix list then a new list is created.
   if (qf_init(wp, p_ef, p_efm, (eap->cmdidx != CMD_caddfile
                                 && eap->cmdidx != CMD_laddfile),
-          *eap->cmdlinep) > 0
+              *eap->cmdlinep, enc) > 0
       && (eap->cmdidx == CMD_cfile
           || eap->cmdidx == CMD_lfile)) {
     if (au_name != NULL)
@@ -4028,6 +4073,7 @@ enum {
   QF_GETLIST_ITEMS = 0x2,
   QF_GETLIST_NR = 0x4,
   QF_GETLIST_WINID = 0x8,
+  QF_GETLIST_CONTEXT = 0x10,
   QF_GETLIST_ALL = 0xFF
 };
 
@@ -4078,6 +4124,10 @@ int get_errorlist_properties(win_T *wp, dict_T *what, dict_T *retdict)
     flags |= QF_GETLIST_WINID;
   }
 
+  if (tv_dict_find(what, S_LEN("context")) != NULL) {
+    flags |= QF_GETLIST_CONTEXT;
+  }
+
   if (flags & QF_GETLIST_TITLE) {
     char_u *t = qi->qf_lists[qf_idx].qf_title;
     if (t == NULL) {
@@ -4095,6 +4145,20 @@ int get_errorlist_properties(win_T *wp, dict_T *what, dict_T *retdict)
     }
   }
 
+  if ((status == OK) && (flags & QF_GETLIST_CONTEXT)) {
+    if (qi->qf_lists[qf_idx].qf_ctx != NULL) {
+      di = tv_dict_item_alloc_len(S_LEN("context"));
+      if (di != NULL) {
+        tv_copy(qi->qf_lists[qf_idx].qf_ctx, &di->di_tv);
+        if (tv_dict_add(retdict, di) == FAIL) {
+          tv_dict_item_free(di);
+        }
+      }
+    } else {
+      status = tv_dict_add_str(retdict, S_LEN("context"), "");
+    }
+  }
+
   return status;
 }
 
@@ -4158,6 +4222,11 @@ static int qf_add_entries(qf_info_T *qi, list_T *list, char_u *title,
       bufnum = 0;
     }
 
+    // If the 'valid' field is present it overrules the detected value.
+    if (tv_dict_find(d, "valid", -1) != NULL) {
+      valid = (int)tv_dict_get_number(d, "valid");
+    }
+
     int status = qf_add_entry(qi,
                               NULL,      // dir
                               (char_u *)filename,
@@ -4213,7 +4282,10 @@ static int qf_set_properties(qf_info_T *qi, dict_T *what, int action)
   if ((di = tv_dict_find(what, S_LEN("nr"))) != NULL) {
     // Use the specified quickfix/location list
     if (di->di_tv.v_type == VAR_NUMBER) {
-      qf_idx = (int)di->di_tv.vval.v_number - 1;
+      // for zero use the current list
+      if (di->di_tv.vval.v_number != 0) {
+        qf_idx = (int)di->di_tv.vval.v_number - 1;
+      }
       if (qf_idx < 0 || qf_idx >= qi->qf_listcount) {
         return FAIL;
       }
@@ -4240,9 +4312,75 @@ static int qf_set_properties(qf_info_T *qi, dict_T *what, int action)
     }
   }
 
+  if ((di = tv_dict_find(what, S_LEN("context"))) != NULL) {
+    tv_free(qi->qf_lists[qf_idx].qf_ctx);
+
+    typval_T *ctx = xcalloc(1, sizeof(typval_T));
+    tv_copy(&di->di_tv, ctx);
+    qi->qf_lists[qf_idx].qf_ctx = ctx;
+  }
+
   return retval;
 }
 
+// Find the non-location list window with the specified location list.
+static win_T * find_win_with_ll(qf_info_T *qi)
+{
+  FOR_ALL_WINDOWS_IN_TAB(wp, curtab) {
+    if ((wp->w_llist == qi) && !bt_quickfix(wp->w_buffer)) {
+      return wp;
+    }
+  }
+
+  return NULL;
+}
+
+// Free the entire quickfix/location list stack.
+// If the quickfix/location list window is open, then clear it.
+static void qf_free_stack(win_T *wp, qf_info_T *qi)
+{
+  win_T *qfwin = qf_find_win(qi);
+
+  if (qfwin != NULL) {
+    // If the quickfix/location list window is open, then clear it
+    if (qi->qf_curlist < qi->qf_listcount) {
+      qf_free(qi, qi->qf_curlist);
+    }
+    qf_update_buffer(qi, NULL);
+  }
+
+  win_T *llwin = NULL;
+  win_T *orig_wp = wp;
+  if (wp != NULL && IS_LL_WINDOW(wp)) {
+    // If in the location list window, then use the non-location list
+    // window with this location list (if present)
+    llwin = find_win_with_ll(qi);
+    if (llwin != NULL) {
+      wp = llwin;
+    }
+  }
+
+  qf_free_all(wp);
+  if (wp == NULL) {
+    // quickfix list
+    qi->qf_curlist = 0;
+    qi->qf_listcount = 0;
+  } else if (IS_LL_WINDOW(orig_wp)) {
+    // If the location list window is open, then create a new empty location
+    // list
+    qf_info_T *new_ll = ll_new_list();
+
+    // first free the list reference in the location list window
+    ll_free_all(&orig_wp->w_llist_ref);
+
+    orig_wp->w_llist_ref = new_ll;
+    if (llwin != NULL) {
+      llwin->w_llist = new_ll;
+      new_ll->qf_refcount++;
+    }
+  }
+}
+
 // Populate the quickfix list with the items supplied in the list
 // of dictionaries. "title" will be copied to w:quickfix_title
 // "action" is 'a' for add, 'r' for replace.  Otherwise create a new list.
@@ -4256,7 +4394,10 @@ int set_errorlist(win_T *wp, list_T *list, int action, char_u *title,
     qi = ll_get_or_alloc_list(wp);
   }
 
-  if (what != NULL) {
+  if (action == 'f') {
+    // Free the entire quickfix or location list stack
+    qf_free_stack(wp, qi);
+  } else if (what != NULL) {
     retval = qf_set_properties(qi, what, action);
   } else {
     retval = qf_add_entries(qi, list, title, action);
@@ -4265,6 +4406,42 @@ int set_errorlist(win_T *wp, list_T *list, int action, char_u *title,
   return retval;
 }
 
+static bool mark_quickfix_ctx(qf_info_T *qi, int copyID)
+{
+  bool abort = false;
+
+  for (int i = 0; i < LISTCOUNT && !abort; i++) {
+    typval_T *ctx = qi->qf_lists[i].qf_ctx;
+    if (ctx != NULL && ctx->v_type != VAR_NUMBER
+        && ctx->v_type != VAR_STRING && ctx->v_type != VAR_FLOAT) {
+      abort = set_ref_in_item(ctx, copyID, NULL, NULL);
+    }
+  }
+
+  return abort;
+}
+
+/// Mark the context of the quickfix list and the location lists (if present) as
+/// "in use". So that garabage collection doesn't free the context.
+bool set_ref_in_quickfix(int copyID)
+{
+  bool abort = mark_quickfix_ctx(&ql_info, copyID);
+  if (abort) {
+    return abort;
+  }
+
+  FOR_ALL_TAB_WINDOWS(tp, win) {
+    if (win->w_llist != NULL) {
+      abort = mark_quickfix_ctx(win->w_llist, copyID);
+      if (abort) {
+        return abort;
+      }
+    }
+  }
+
+  return abort;
+}
+
 /*
  * ":[range]cbuffer [bufnr]" command.
  * ":[range]caddbuffer [bufnr]" command.
@@ -4342,7 +4519,7 @@ void ex_cbuffer(exarg_T *eap)
       if (qf_init_ext(qi, NULL, buf, NULL, p_efm,
                       (eap->cmdidx != CMD_caddbuffer
                        && eap->cmdidx != CMD_laddbuffer),
-                      eap->line1, eap->line2, qf_title) > 0) {
+                      eap->line1, eap->line2, qf_title, NULL) > 0) {
         if (au_name != NULL) {
           apply_autocmds(EVENT_QUICKFIXCMDPOST, (char_u *)au_name,
                          curbuf->b_fname, true, curbuf);
@@ -4407,7 +4584,7 @@ void ex_cexpr(exarg_T *eap)
       if (qf_init_ext(qi, NULL, NULL, &tv, p_efm,
                       (eap->cmdidx != CMD_caddexpr
                        && eap->cmdidx != CMD_laddexpr),
-                      (linenr_T)0, (linenr_T)0, *eap->cmdlinep) > 0) {
+                      (linenr_T)0, (linenr_T)0, *eap->cmdlinep, NULL) > 0) {
         if (au_name != NULL) {
           apply_autocmds(EVENT_QUICKFIXCMDPOST, (char_u *)au_name,
                          curbuf->b_fname, true, curbuf);
@@ -4478,6 +4655,9 @@ void ex_helpgrep(exarg_T *eap)
     }
   }
 
+  // Autocommands may change the list. Save it for later comparison
+  qf_info_T *save_qi = qi;
+
   regmatch.regprog = vim_regcomp(eap->arg, RE_MAGIC + RE_STRING);
   regmatch.rm_ic = FALSE;
   if (regmatch.regprog != NULL) {
@@ -4590,10 +4770,11 @@ void ex_helpgrep(exarg_T *eap)
 
   if (au_name != NULL) {
     apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
-        curbuf->b_fname, TRUE, curbuf);
-    if (!new_qi && qi != &ql_info && qf_find_buf(qi) == NULL)
-      /* autocommands made "qi" invalid */
+                   curbuf->b_fname, true, curbuf);
+    if (!new_qi && qi != save_qi && qf_find_buf(qi) == NULL) {
+      // autocommands made "qi" invalid
       return;
+    }
   }
 
   /* Jump to first match. */
diff --git a/src/nvim/testdir/Makefile b/src/nvim/testdir/Makefile
index e1faaccb84..1f8cf8a0e7 100644
--- a/src/nvim/testdir/Makefile
+++ b/src/nvim/testdir/Makefile
@@ -65,6 +65,7 @@ NEW_TESTS ?= \
 	    test_increment_dbcs.res \
 	    test_lambda.res \
 	    test_langmap.res \
+	    test_makeencoding.res \
 	    test_marks.res \
 	    test_match.res \
 	    test_matchadd_conceal.res \
diff --git a/src/nvim/testdir/test_makeencoding.py b/src/nvim/testdir/test_makeencoding.py
new file mode 100644
index 0000000000..041edadc0a
--- /dev/null
+++ b/src/nvim/testdir/test_makeencoding.py
@@ -0,0 +1,67 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# Test program for :make, :grep and :cgetfile.
+
+from __future__ import print_function, unicode_literals
+import locale
+import io
+import sys
+
+def set_output_encoding(enc=None):
+    """Set the encoding of stdout and stderr
+
+    arguments:
+      enc -- Encoding name.
+             If omitted, locale.getpreferredencoding() is used.
+    """
+    if enc is None:
+        enc = locale.getpreferredencoding()
+
+    def get_text_writer(fo, **kwargs):
+        kw = dict(kwargs)
+        kw.setdefault('errors', 'backslashreplace') # use \uXXXX style
+        kw.setdefault('closefd', False)
+
+        if sys.version_info[0] < 3:
+            # Work around for Python 2.x
+            # New line conversion isn't needed here. Done in somewhere else.
+            writer = io.open(fo.fileno(), mode='w', newline='', **kw)
+            write = writer.write    # save the original write() function
+            enc = locale.getpreferredencoding()
+            def convwrite(s):
+                if isinstance(s, bytes):
+                    write(s.decode(enc))    # convert to unistr
+                else:
+                    write(s)
+                try:
+                    writer.flush()  # needed on Windows
+                except IOError:
+                    pass
+            writer.write = convwrite
+        else:
+            writer = io.open(fo.fileno(), mode='w', **kw)
+        return writer
+
+    sys.stdout = get_text_writer(sys.stdout, encoding=enc)
+    sys.stderr = get_text_writer(sys.stderr, encoding=enc)
+
+
+def main():
+    enc = 'utf-8'
+    if len(sys.argv) > 1:
+        enc = sys.argv[1]
+    set_output_encoding(enc)
+
+    message_tbl = {
+            'utf-8': 'ÀÈÌÒÙ こんにちは 你好',
+            'latin1': 'ÀÈÌÒÙ',
+            'cp932': 'こんにちは',
+            'cp936': '你好',
+            }
+
+    print('Xfoobar.c(10) : %s (%s)' % (message_tbl[enc], enc))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/src/nvim/testdir/test_makeencoding.vim b/src/nvim/testdir/test_makeencoding.vim
new file mode 100644
index 0000000000..a3d5538a47
--- /dev/null
+++ b/src/nvim/testdir/test_makeencoding.vim
@@ -0,0 +1,106 @@
+" Tests for 'makeencoding'.
+if !has('multi_byte')
+  finish
+endif
+
+source shared.vim
+
+let s:python = PythonProg()
+if s:python == ''
+  " Can't run this test.
+  finish
+endif
+
+let s:script = 'test_makeencoding.py'
+
+let s:message_tbl = {
+      \ 'utf-8': 'ÀÈÌÒÙ こんにちは 你好',
+      \ 'latin1': 'ÀÈÌÒÙ',
+      \ 'cp932': 'こんにちは',
+      \ 'cp936': '你好',
+      \}
+
+
+" Tests for :cgetfile and :lgetfile.
+func Test_getfile()
+  set errorfile=Xerror.txt
+  set errorformat=%f(%l)\ :\ %m
+
+  " :cgetfile
+  for enc in keys(s:message_tbl)
+    let &makeencoding = enc
+    exec "silent !" . s:python . " " . s:script . " " . enc . " > " . &errorfile
+    cgetfile
+    copen
+    call assert_equal("Xfoobar.c|10| " . s:message_tbl[enc] . " (" . enc . ")",
+          \ getline('.'))
+    cclose
+  endfor
+
+  " :lgetfile
+  for enc in keys(s:message_tbl)
+    let &makeencoding = enc
+    exec "silent !" . s:python . " " . s:script . " " . enc . " > " . &errorfile
+    lgetfile
+    lopen
+    call assert_equal("Xfoobar.c|10| " . s:message_tbl[enc] . " (" . enc . ")",
+          \ getline('.'))
+    lclose
+  endfor
+
+  call delete(&errorfile)
+endfunc
+
+
+" Tests for :grep and :lgrep.
+func Test_grep()
+  let &grepprg = s:python
+  set grepformat=%f(%l)\ :\ %m
+
+  " :grep
+  for enc in keys(s:message_tbl)
+    let &makeencoding = enc
+    exec "silent grep! " . s:script . " " . enc
+    copen
+    call assert_equal("Xfoobar.c|10| " . s:message_tbl[enc] . " (" . enc . ")",
+          \ getline('.'))
+    cclose
+  endfor
+
+  " :lgrep
+  for enc in keys(s:message_tbl)
+    let &makeencoding = enc
+    exec "silent lgrep! " . s:script . " " . enc
+    lopen
+    call assert_equal("Xfoobar.c|10| " . s:message_tbl[enc] . " (" . enc . ")",
+          \ getline('.'))
+    lclose
+  endfor
+endfunc
+
+
+" Tests for :make and :lmake.
+func Test_make()
+  let &makeprg = s:python
+  set errorformat=%f(%l)\ :\ %m
+
+  " :make
+  for enc in keys(s:message_tbl)
+    let &makeencoding = enc
+    exec "silent make! " . s:script . " " . enc
+    copen
+    call assert_equal("Xfoobar.c|10| " . s:message_tbl[enc] . " (" . enc . ")",
+          \ getline('.'))
+    cclose
+  endfor
+
+  " :lmake
+  for enc in keys(s:message_tbl)
+    let &makeencoding = enc
+    exec "silent lmake! " . s:script . " " . enc
+    lopen
+    call assert_equal("Xfoobar.c|10| " . s:message_tbl[enc] . " (" . enc . ")",
+          \ getline('.'))
+    lclose
+  endfor
+endfunc
diff --git a/src/nvim/testdir/test_quickfix.vim b/src/nvim/testdir/test_quickfix.vim
index aff5fc2eed..30023dddc9 100644
--- a/src/nvim/testdir/test_quickfix.vim
+++ b/src/nvim/testdir/test_quickfix.vim
@@ -24,19 +24,21 @@ func s:setup_commands(cchar)
     command! -nargs=* Xgetbuffer <mods>cgetbuffer <args>
     command! -nargs=* Xaddbuffer <mods>caddbuffer <args>
     command! -nargs=* Xrewind <mods>crewind <args>
-    command! -nargs=* -bang Xnext <mods>cnext<bang> <args>
-    command! -nargs=* -bang Xprev <mods>cprev<bang> <args>
+    command! -count -nargs=* -bang Xnext <mods><count>cnext<bang> <args>
+    command! -count -nargs=* -bang Xprev <mods><count>cprev<bang> <args>
     command! -nargs=* -bang Xfirst <mods>cfirst<bang> <args>
     command! -nargs=* -bang Xlast <mods>clast<bang> <args>
     command! -nargs=* -bang Xnfile <mods>cnfile<bang> <args>
     command! -nargs=* -bang Xpfile <mods>cpfile<bang> <args>
     command! -nargs=* Xexpr <mods>cexpr <args>
-    command! -nargs=* Xvimgrep <mods>vimgrep <args>
+    command! -range -nargs=* Xvimgrep <mods><count>vimgrep <args>
+    command! -nargs=* Xvimgrepadd <mods>vimgrepadd <args>
     command! -nargs=* Xgrep <mods> grep <args>
     command! -nargs=* Xgrepadd <mods> grepadd <args>
     command! -nargs=* Xhelpgrep helpgrep <args>
     let g:Xgetlist = function('getqflist')
     let g:Xsetlist = function('setqflist')
+    call setqflist([], 'f')
   else
     command! -nargs=* -bang Xlist <mods>llist<bang> <args>
     command! -nargs=* Xgetexpr <mods>lgetexpr <args>
@@ -54,19 +56,21 @@ func s:setup_commands(cchar)
     command! -nargs=* Xgetbuffer <mods>lgetbuffer <args>
     command! -nargs=* Xaddbuffer <mods>laddbuffer <args>
     command! -nargs=* Xrewind <mods>lrewind <args>
-    command! -nargs=* -bang Xnext <mods>lnext<bang> <args>
-    command! -nargs=* -bang Xprev <mods>lprev<bang> <args>
+    command! -count -nargs=* -bang Xnext <mods><count>lnext<bang> <args>
+    command! -count -nargs=* -bang Xprev <mods><count>lprev<bang> <args>
     command! -nargs=* -bang Xfirst <mods>lfirst<bang> <args>
     command! -nargs=* -bang Xlast <mods>llast<bang> <args>
     command! -nargs=* -bang Xnfile <mods>lnfile<bang> <args>
     command! -nargs=* -bang Xpfile <mods>lpfile<bang> <args>
     command! -nargs=* Xexpr <mods>lexpr <args>
-    command! -nargs=* Xvimgrep <mods>lvimgrep <args>
+    command! -range -nargs=* Xvimgrep <mods><count>lvimgrep <args>
+    command! -nargs=* Xvimgrepadd <mods>lvimgrepadd <args>
     command! -nargs=* Xgrep <mods> lgrep <args>
     command! -nargs=* Xgrepadd <mods> lgrepadd <args>
     command! -nargs=* Xhelpgrep lhelpgrep <args>
     let g:Xgetlist = function('getloclist', [0])
     let g:Xsetlist = function('setloclist', [0])
+    call setloclist(0, [], 'f')
   endif
 endfunc
 
@@ -74,6 +78,9 @@ endfunc
 func XlistTests(cchar)
   call s:setup_commands(a:cchar)
 
+  if a:cchar == 'l'
+      call assert_fails('llist', 'E776:')
+  endif
   " With an empty list, command should return error
   Xgetexpr []
   silent! Xlist
@@ -85,49 +92,52 @@ func XlistTests(cchar)
 		  \ 'non-error 3', 'Xtestfile3:3:1:Line3']
 
   " List only valid entries
-  redir => result
-  Xlist
-  redir END
-  let l = split(result, "\n")
+  let l = split(execute('Xlist', ''), "\n")
   call assert_equal([' 2 Xtestfile1:1 col 3: Line1',
 		   \ ' 4 Xtestfile2:2 col 2: Line2',
 		   \ ' 6 Xtestfile3:3 col 1: Line3'], l)
 
   " List all the entries
-  redir => result
-  Xlist!
-  redir END
-  let l = split(result, "\n")
+  let l = split(execute('Xlist!', ''), "\n")
   call assert_equal([' 1: non-error 1', ' 2 Xtestfile1:1 col 3: Line1',
 		   \ ' 3: non-error 2', ' 4 Xtestfile2:2 col 2: Line2',
 		   \ ' 5: non-error 3', ' 6 Xtestfile3:3 col 1: Line3'], l)
 
   " List a range of errors
-  redir => result
-  Xlist 3,6
-  redir END
-  let l = split(result, "\n")
+  let l = split(execute('Xlist 3,6', ''), "\n")
   call assert_equal([' 4 Xtestfile2:2 col 2: Line2',
 		   \ ' 6 Xtestfile3:3 col 1: Line3'], l)
 
-  redir => result
-  Xlist! 3,4
-  redir END
-  let l = split(result, "\n")
+  let l = split(execute('Xlist! 3,4', ''), "\n")
   call assert_equal([' 3: non-error 2', ' 4 Xtestfile2:2 col 2: Line2'], l)
 
-  redir => result
-  Xlist -6,-4
-  redir END
-  let l = split(result, "\n")
+  let l = split(execute('Xlist -6,-4', ''), "\n")
   call assert_equal([' 2 Xtestfile1:1 col 3: Line1'], l)
 
-  redir => result
-  Xlist! -5,-3
-  redir END
-  let l = split(result, "\n")
+  let l = split(execute('Xlist! -5,-3', ''), "\n")
   call assert_equal([' 2 Xtestfile1:1 col 3: Line1',
 		   \ ' 3: non-error 2', ' 4 Xtestfile2:2 col 2: Line2'], l)
+
+  " Test for '+'
+  let l = split(execute('Xlist! +2', ''), "\n")
+  call assert_equal([' 2 Xtestfile1:1 col 3: Line1',
+		   \ ' 3: non-error 2', ' 4 Xtestfile2:2 col 2: Line2'], l)
+
+  " Different types of errors
+  call g:Xsetlist([{'lnum':10,'col':5,'type':'W', 'text':'Warning','nr':11},
+	      \ {'lnum':20,'col':10,'type':'e','text':'Error','nr':22},
+	      \ {'lnum':30,'col':15,'type':'i','text':'Info','nr':33},
+	      \ {'lnum':40,'col':20,'type':'x', 'text':'Other','nr':44},
+	      \ {'lnum':50,'col':25,'type':"\<C-A>",'text':'one','nr':55}])
+  let l = split(execute('Xlist', ""), "\n")
+  call assert_equal([' 1:10 col 5 warning  11: Warning',
+	      \ ' 2:20 col 10 error  22: Error',
+	      \ ' 3:30 col 15 info  33: Info',
+	      \ ' 4:40 col 20 x  44: Other',
+	      \ ' 5:50 col 25  55: one'], l)
+
+  " Error cases
+  call assert_fails('Xlist abc', 'E488:')
 endfunc
 
 func Test_clist()
@@ -141,6 +151,9 @@ endfunc
 func XageTests(cchar)
   call s:setup_commands(a:cchar)
 
+  let list = [{'bufnr': 1, 'lnum': 1}]
+  call g:Xsetlist(list)
+
   " Jumping to a non existent list should return error
   silent! Xolder 99
   call assert_true(v:errmsg ==# 'E380: At bottom of quickfix stack')
@@ -174,11 +187,7 @@ func XageTests(cchar)
 endfunc
 
 func Test_cage()
-  let list = [{'bufnr': 1, 'lnum': 1}]
-  call setqflist(list)
   call XageTests('c')
-
-  call setloclist(0, list)
   call XageTests('l')
 endfunc
 
@@ -187,6 +196,11 @@ endfunc
 func XwindowTests(cchar)
   call s:setup_commands(a:cchar)
 
+  " Opening the location list window without any errors should fail
+  if a:cchar == 'l'
+      call assert_fails('lopen', 'E776:')
+  endif
+
   " Create a list with no valid entries
   Xgetexpr ['non-error 1', 'non-error 2', 'non-error 3']
 
@@ -227,6 +241,19 @@ func XwindowTests(cchar)
   " Calling cwindow should close the quickfix window with no valid errors
   Xwindow
   call assert_true(winnr('$') == 1)
+
+  if a:cchar == 'c'
+      " Opening the quickfix window in multiple tab pages should reuse the
+      " quickfix buffer
+      Xgetexpr ['Xtestfile1:1:3:Line1', 'Xtestfile2:2:2:Line2',
+		  \ 'Xtestfile3:3:1:Line3']
+      Xopen
+      let qfbufnum = bufnr('%')
+      tabnew
+      Xopen
+      call assert_equal(qfbufnum, bufnr('%'))
+      new | only | tabonly
+  endif
 endfunc
 
 func Test_cwindow()
@@ -316,6 +343,23 @@ func XbufferTests(cchar)
 	\ l[3].lnum == 750 && l[3].col == 25 && l[3].text ==# 'Line 750')
   enew!
 
+  " Check for invalid buffer
+  call assert_fails('Xbuffer 199', 'E474:')
+
+  " Check for unloaded buffer
+  edit Xtestfile1
+  let bnr = bufnr('%')
+  enew!
+  call assert_fails('Xbuffer ' . bnr, 'E681:')
+
+  " Check for invalid range
+  " Using Xbuffer will not run the range check in the cbuffer/lbuffer
+  " commands. So directly call the commands.
+  if (a:cchar == 'c')
+      call assert_fails('900,999cbuffer', 'E16:')
+  else
+      call assert_fails('900,999lbuffer', 'E16:')
+  endif
 endfunc
 
 func Test_cbuffer()
@@ -338,13 +382,22 @@ endfunc
 func Xtest_browse(cchar)
   call s:setup_commands(a:cchar)
 
+  " Jumping to first or next location list entry without any error should
+  " result in failure
+  if a:cchar == 'l'
+      call assert_fails('lfirst', 'E776:')
+      call assert_fails('lnext', 'E776:')
+  endif
+
   call s:create_test_file('Xqftestfile1')
   call s:create_test_file('Xqftestfile2')
 
   Xgetexpr ['Xqftestfile1:5:Line5',
 		\ 'Xqftestfile1:6:Line6',
 		\ 'Xqftestfile2:10:Line10',
-		\ 'Xqftestfile2:11:Line11']
+		\ 'Xqftestfile2:11:Line11',
+		\ 'RegularLine1',
+		\ 'RegularLine2']
 
   Xfirst
   call assert_fails('Xprev', 'E553')
@@ -356,6 +409,7 @@ func Xtest_browse(cchar)
   call assert_equal('Xqftestfile1', bufname('%'))
   call assert_equal(6, line('.'))
   Xlast
+  Xprev
   call assert_equal('Xqftestfile2', bufname('%'))
   call assert_equal(11, line('.'))
   call assert_fails('Xnext', 'E553')
@@ -364,6 +418,16 @@ func Xtest_browse(cchar)
   call assert_equal('Xqftestfile1', bufname('%'))
   call assert_equal(5, line('.'))
 
+  10Xnext
+  call assert_equal('Xqftestfile2', bufname('%'))
+  call assert_equal(11, line('.'))
+  10Xprev
+  call assert_equal('Xqftestfile1', bufname('%'))
+  call assert_equal(5, line('.'))
+
+  Xexpr ""
+  call assert_fails('Xnext', 'E42:')
+
   call delete('Xqftestfile1')
   call delete('Xqftestfile2')
 endfunc
@@ -383,8 +447,32 @@ func s:test_xhelpgrep(cchar)
     let title_text = ':lhelpgrep quickfix'
   endif
   call assert_true(w:quickfix_title =~ title_text, w:quickfix_title)
+
+  " Jumping to a help topic should open the help window
+  only
+  Xnext
+  call assert_true(&buftype == 'help')
+  call assert_true(winnr('$') == 2)
+  " Jumping to the next match should reuse the help window
+  Xnext
+  call assert_true(&buftype == 'help')
+  call assert_true(winnr() == 1)
+  call assert_true(winnr('$') == 2)
+  " Jumping to the next match from the quickfix window should reuse the help
+  " window
+  Xopen
+  Xnext
+  call assert_true(&buftype == 'help')
+  call assert_true(winnr() == 1)
+  call assert_true(winnr('$') == 2)
+
   " This wipes out the buffer, make sure that doesn't cause trouble.
   Xclose
+
+  new | only
+
+  " Search for non existing help string
+  call assert_fails('Xhelpgrep a1b2c3', 'E480:')
 endfunc
 
 func Test_helpgrep()
@@ -521,10 +609,7 @@ func Test_locationlist()
     lrewind
     enew
     lopen
-    lnext
-    lnext
-    lnext
-    lnext
+    4lnext
     vert split
     wincmd L
     lopen
@@ -578,7 +663,7 @@ func Test_locationlist()
     wincmd n | only
 
     augroup! testgroup
-  endfunc
+endfunc
 
 func Test_locationlist_curwin_was_closed()
     augroup testgroup
@@ -597,7 +682,7 @@ func Test_locationlist_curwin_was_closed()
     call assert_fails('lrewind', 'E924:')
 
     augroup! testgroup
-  endfunc
+endfunc
 
 func Test_locationlist_cross_tab_jump()
   call writefile(['loclistfoo'], 'loclistfoo')
@@ -734,7 +819,7 @@ func Test_efm1()
     call delete('Xerrorfile1')
     call delete('Xerrorfile2')
     call delete('Xtestfile')
-  endfunc
+endfunc
 
 " Test for quickfix directory stack support
 func s:dir_stack_tests(cchar)
@@ -893,30 +978,44 @@ func Test_efm2()
   call assert_equal(l[0].pattern, '^\VLine search text\$')
   call assert_equal(l[0].lnum, 0)
 
+  let l = split(execute('clist', ''), "\n")
+  call assert_equal([' 1 Xtestfile:^\VLine search text\$:  '], l)
+
   " Test for %P, %Q and %t format specifiers
   let lines=["[Xtestfile1]",
 	      \ "(1,17)  error: ';' missing",
 	      \ "(21,2)  warning: variable 'z' not defined",
 	      \ "(67,3)  error: end of file found before string ended",
+	      \ "--",
 	      \ "",
 	      \ "[Xtestfile2]",
+	      \ "--",
 	      \ "",
 	      \ "[Xtestfile3]",
 	      \ "NEW compiler v1.1",
 	      \ "(2,2)   warning: variable 'x' not defined",
-	      \ "(67,3)  warning: 's' already defined"
+	      \ "(67,3)  warning: 's' already defined",
+	      \ "--"
 	      \]
-  set efm=%+P[%f],(%l\\,%c)%*[\ ]%t%*[^:]:\ %m,%-Q
+  set efm=%+P[%f]%r,(%l\\,%c)%*[\ ]%t%*[^:]:\ %m,%+Q--%r
+  " To exercise the push/pop file functionality in quickfix, the test files
+  " need to be created.
+  call writefile(['Line1'], 'Xtestfile1')
+  call writefile(['Line2'], 'Xtestfile2')
+  call writefile(['Line3'], 'Xtestfile3')
   cexpr ""
   for l in lines
       caddexpr l
   endfor
   let l = getqflist()
-  call assert_equal(9, len(l))
+  call assert_equal(12, len(l))
   call assert_equal(21, l[2].lnum)
   call assert_equal(2, l[2].col)
   call assert_equal('w', l[2].type)
   call assert_equal('e', l[3].type)
+  call delete('Xtestfile1')
+  call delete('Xtestfile2')
+  call delete('Xtestfile3')
 
   " Tests for %E, %C and %Z format specifiers
   let lines = ["Error 275",
@@ -968,6 +1067,25 @@ func Test_efm2()
   call assert_equal(1, l[4].valid)
   call assert_equal('unittests/dbfacadeTest.py', bufname(l[4].bufnr))
 
+  " The following sequence of commands used to crash Vim
+  set efm=%W%m
+  cgetexpr ['msg1']
+  let l = getqflist()
+  call assert_equal(1, len(l), string(l))
+  call assert_equal('msg1', l[0].text)
+  set efm=%C%m
+  lexpr 'msg2'
+  let l = getloclist(0)
+  call assert_equal(1, len(l), string(l))
+  call assert_equal('msg2', l[0].text)
+  lopen
+  call setqflist([], 'r')
+  caddbuf
+  let l = getqflist()
+  call assert_equal(1, len(l), string(l))
+  call assert_equal('|| msg2', l[0].text)
+
+  new | only
   let &efm = save_efm
 endfunc
 
@@ -1064,6 +1182,32 @@ func SetXlistTests(cchar, bnum)
   call g:Xsetlist([])
   let l = g:Xgetlist()
   call assert_equal(0, len(l))
+
+  " Tests for setting the 'valid' flag
+  call g:Xsetlist([{'bufnr':a:bnum, 'lnum':4, 'valid':0}])
+  Xwindow
+  call assert_equal(1, winnr('$'))
+  let l = g:Xgetlist()
+  call g:Xsetlist(l)
+  call assert_equal(0, g:Xgetlist()[0].valid)
+  call g:Xsetlist([{'text':'Text1', 'valid':1}])
+  Xwindow
+  call assert_equal(2, winnr('$'))
+  Xclose
+  let save_efm = &efm
+  set efm=%m
+  Xgetexpr 'TestMessage'
+  let l = g:Xgetlist()
+  call g:Xsetlist(l)
+  call assert_equal(1, g:Xgetlist()[0].valid)
+  let &efm = save_efm
+
+  " Error cases:
+  " Refer to a non-existing buffer and pass a non-dictionary type
+  call assert_fails("call g:Xsetlist([{'bufnr':998, 'lnum':4}," .
+	      \ " {'bufnr':999, 'lnum':5}])", 'E92:')
+  call g:Xsetlist([[1, 2,3]])
+  call assert_equal(0, len(g:Xgetlist()))
 endfunc
 
 func Test_setqflist()
@@ -1082,7 +1226,8 @@ func Xlist_empty_middle(cchar)
   call s:setup_commands(a:cchar)
 
   " create three quickfix lists
-  Xvimgrep Test_ test_quickfix.vim
+  let @/ = 'Test_'
+  Xvimgrep // test_quickfix.vim
   let testlen = len(g:Xgetlist())
   call assert_true(testlen > 0)
   Xvimgrep empty test_quickfix.vim
@@ -1290,18 +1435,18 @@ func Test_switchbuf()
   let winid = win_getid()
   cfirst | cnext
   call assert_equal(winid, win_getid())
-  cnext | cnext
+  2cnext
   call assert_equal(winid, win_getid())
-  cnext | cnext
+  2cnext
   call assert_equal(winid, win_getid())
   enew
 
   set switchbuf=useopen
   cfirst | cnext
   call assert_equal(file1_winid, win_getid())
-  cnext | cnext
+  2cnext
   call assert_equal(file2_winid, win_getid())
-  cnext | cnext
+  2cnext
   call assert_equal(file2_winid, win_getid())
 
   enew | only
@@ -1311,9 +1456,9 @@ func Test_switchbuf()
   tabfirst
   cfirst | cnext
   call assert_equal(2, tabpagenr())
-  cnext | cnext
+  2cnext
   call assert_equal(3, tabpagenr())
-  cnext | cnext
+  2cnext
   call assert_equal(3, tabpagenr())
   tabfirst | tabonly | enew
 
@@ -1351,11 +1496,25 @@ func Test_switchbuf()
   call assert_equal(2, winnr('$'))
   call assert_equal(1, bufwinnr('Xqftestfile3'))
 
+  " If only quickfix window is open in the current tabpage, jumping to an
+  " entry with 'switchubf' set to 'usetab' should search in other tabpages.
   enew | only
+  set switchbuf=usetab
+  tabedit Xqftestfile1
+  tabedit Xqftestfile2
+  tabedit Xqftestfile3
+  tabfirst
+  copen | only
+  clast
+  call assert_equal(4, tabpagenr())
+  tabfirst | tabonly | enew | only
 
   call delete('Xqftestfile1')
   call delete('Xqftestfile2')
   call delete('Xqftestfile3')
+  set switchbuf&vim
+
+  enew | only
 endfunc
 
 func Xadjust_qflnum(cchar)
@@ -1468,6 +1627,11 @@ endfunc
 func XbottomTests(cchar)
   call s:setup_commands(a:cchar)
 
+  " Calling lbottom without any errors should fail
+  if a:cchar == 'l'
+      call assert_fails('lbottom', 'E776:')
+  endif
+
   call g:Xsetlist([{'filename': 'foo', 'lnum': 42}]) 
   Xopen
   let wid = win_getid()
@@ -1489,10 +1653,9 @@ endfunc
 func HistoryTest(cchar)
   call s:setup_commands(a:cchar)
 
-  call assert_fails(a:cchar . 'older 99', 'E380:')
   " clear all lists after the first one, then replace the first one.
   call g:Xsetlist([])
-  Xolder
+  call assert_fails('Xolder 99', 'E380:')
   let entry = {'filename': 'foo', 'lnum': 42}
   call g:Xsetlist([entry], 'r')
   call g:Xsetlist([entry, entry])
@@ -1535,6 +1698,7 @@ func Xproperty_tests(cchar)
     call assert_fails('call g:Xsetlist([], "a", [])', 'E715:')
 
     " Set and get the title
+    call g:Xsetlist([])
     Xopen
     wincmd p
     call g:Xsetlist([{'filename':'foo', 'lnum':27}])
@@ -1561,6 +1725,22 @@ func Xproperty_tests(cchar)
     call g:Xsetlist([], ' ', {'title' : 'N3'})
     call assert_equal('N2', g:Xgetlist({'nr':2, 'title':1}).title)
 
+    " Changing the title of an earlier quickfix list
+    call g:Xsetlist([], ' ', {'title' : 'NewTitle', 'nr' : 2})
+    call assert_equal('NewTitle', g:Xgetlist({'nr':2, 'title':1}).title)
+
+    " Changing the title of an invalid quickfix list
+    call assert_equal(-1, g:Xsetlist([], ' ',
+		\ {'title' : 'SomeTitle', 'nr' : 99}))
+    call assert_equal(-1, g:Xsetlist([], ' ',
+		\ {'title' : 'SomeTitle', 'nr' : 'abc'}))
+
+    if a:cchar == 'c'
+	copen
+	call assert_equal({'winid':win_getid()}, getqflist({'winid':1}))
+	cclose
+    endif
+
     " Invalid arguments
     call assert_fails('call g:Xgetlist([])', 'E715')
     call assert_fails('call g:Xsetlist([], "a", [])', 'E715')
@@ -1568,16 +1748,81 @@ func Xproperty_tests(cchar)
     call assert_equal(-1, s)
 
     call assert_equal({}, g:Xgetlist({'abc':1}))
+    call assert_equal({}, g:Xgetlist({'nr':99, 'title':1}))
+    call assert_equal({}, g:Xgetlist({'nr':[], 'title':1}))
 
     if a:cchar == 'l'
-        call assert_equal({}, getloclist(99, {'title': 1}))
+	call assert_equal({}, getloclist(99, {'title': 1}))
     endif
-  endfunc
+
+    " Context related tests
+    call g:Xsetlist([], 'a', {'context':[1,2,3]})
+    call test_garbagecollect_now()
+    let d = g:Xgetlist({'context':1})
+    call assert_equal([1,2,3], d.context)
+    call g:Xsetlist([], 'a', {'context':{'color':'green'}})
+    let d = g:Xgetlist({'context':1})
+    call assert_equal({'color':'green'}, d.context)
+    call g:Xsetlist([], 'a', {'context':"Context info"})
+    let d = g:Xgetlist({'context':1})
+    call assert_equal("Context info", d.context)
+    call g:Xsetlist([], 'a', {'context':246})
+    let d = g:Xgetlist({'context':1})
+    call assert_equal(246, d.context)
+    if a:cchar == 'l'
+	" Test for copying context across two different location lists
+	new | only
+	let w1_id = win_getid()
+	let l = [1]
+	call setloclist(0, [], 'a', {'context':l})
+	new
+	let w2_id = win_getid()
+	call add(l, 2)
+	call assert_equal([1, 2], getloclist(w1_id, {'context':1}).context)
+	call assert_equal([1, 2], getloclist(w2_id, {'context':1}).context)
+	unlet! l
+	call assert_equal([1, 2], getloclist(w2_id, {'context':1}).context)
+	only
+	call setloclist(0, [], 'f')
+	call assert_equal({}, getloclist(0, {'context':1}))
+    endif
+
+    " Test for changing the context of previous quickfix lists
+    call g:Xsetlist([], 'f')
+    Xexpr "One"
+    Xexpr "Two"
+    Xexpr "Three"
+    call g:Xsetlist([], ' ', {'context' : [1], 'nr' : 1})
+    call g:Xsetlist([], ' ', {'context' : [2], 'nr' : 2})
+    " Also, check for setting the context using quickfix list number zero.
+    call g:Xsetlist([], ' ', {'context' : [3], 'nr' : 0})
+    call test_garbagecollect_now()
+    let l = g:Xgetlist({'nr' : 1, 'context' : 1})
+    call assert_equal([1], l.context)
+    let l = g:Xgetlist({'nr' : 2, 'context' : 1})
+    call assert_equal([2], l.context)
+    let l = g:Xgetlist({'nr' : 3, 'context' : 1})
+    call assert_equal([3], l.context)
+
+    " Test for changing the context through reference and for garbage
+    " collection of quickfix context
+    let l = ["red"]
+    call g:Xsetlist([], ' ', {'context' : l})
+    call add(l, "blue")
+    let x = g:Xgetlist({'context' : 1})
+    call add(x.context, "green")
+    call assert_equal(["red", "blue", "green"], l)
+    call assert_equal(["red", "blue", "green"], x.context)
+    unlet l
+    call test_garbagecollect_now()
+    let m = g:Xgetlist({'context' : 1})
+    call assert_equal(["red", "blue", "green"], m.context)
+endfunc
 
 func Test_qf_property()
     call Xproperty_tests('c')
     call Xproperty_tests('l')
-  endfunc
+endfunc
 
 " Tests for the QuickFixCmdPre/QuickFixCmdPost autocommands
 func QfAutoCmdHandler(loc, cmd)
@@ -1673,3 +1918,187 @@ func Test_dirstack_cleanup()
   caddbuffer
   let &efm = save_efm
 endfunc
+
+" Tests for jumping to entries from the location list window and quickfix
+" window
+func Test_cwindow_jump()
+  set efm=%f%%%l%%%m
+  lgetexpr ["F1%10%Line 10", "F2%20%Line 20", "F3%30%Line 30"]
+  lopen | only
+  lfirst
+  call assert_true(winnr('$') == 2)
+  call assert_true(winnr() == 1)
+  " Location list for the new window should be set
+  call assert_true(getloclist(0)[2].text == 'Line 30')
+
+  " Open a scratch buffer
+  " Open a new window and create a location list
+  " Open the location list window and close the other window
+  " Jump to an entry.
+  " Should create a new window and jump to the entry. The scrtach buffer
+  " should not be used.
+  enew | only
+  set buftype=nofile
+  below new
+  lgetexpr ["F1%10%Line 10", "F2%20%Line 20", "F3%30%Line 30"]
+  lopen
+  2wincmd c
+  lnext
+  call assert_true(winnr('$') == 3)
+  call assert_true(winnr() == 2)
+
+  " Open two windows with two different location lists
+  " Open the location list window and close the previous window
+  " Jump to an entry in the location list window
+  " Should open the file in the first window and not set the location list.
+  enew | only
+  lgetexpr ["F1%5%Line 5"]
+  below new
+  lgetexpr ["F1%10%Line 10", "F2%20%Line 20", "F3%30%Line 30"]
+  lopen
+  2wincmd c
+  lnext
+  call assert_true(winnr() == 1)
+  call assert_true(getloclist(0)[0].text == 'Line 5')
+
+  enew | only
+  cgetexpr ["F1%10%Line 10", "F2%20%Line 20", "F3%30%Line 30"]
+  copen
+  cnext
+  call assert_true(winnr('$') == 2)
+  call assert_true(winnr() == 1)
+
+  enew | only
+  set efm&vim
+endfunc
+
+func XvimgrepTests(cchar)
+  call s:setup_commands(a:cchar)
+
+  call writefile(['Editor:VIM vim',
+	      \ 'Editor:Emacs EmAcS',
+	      \ 'Editor:Notepad NOTEPAD'], 'Xtestfile1')
+  call writefile(['Linux', 'MacOS', 'MS-Windows'], 'Xtestfile2')
+
+  " Error cases
+  call assert_fails('Xvimgrep /abc *', 'E682:')
+
+  let @/=''
+  call assert_fails('Xvimgrep // *', 'E35:')
+
+  call assert_fails('Xvimgrep abc', 'E683:')
+  call assert_fails('Xvimgrep a1b2c3 Xtestfile1', 'E480:')
+  call assert_fails('Xvimgrep pat Xa1b2c3', 'E480:')
+
+  Xexpr ""
+  Xvimgrepadd Notepad Xtestfile1
+  Xvimgrepadd MacOS Xtestfile2
+  let l = g:Xgetlist()
+  call assert_equal(2, len(l))
+  call assert_equal('Editor:Notepad NOTEPAD', l[0].text)
+
+  Xvimgrep #\cvim#g Xtestfile?
+  let l = g:Xgetlist()
+  call assert_equal(2, len(l))
+  call assert_equal(8, l[0].col)
+  call assert_equal(12, l[1].col)
+
+  1Xvimgrep ?Editor? Xtestfile*
+  let l = g:Xgetlist()
+  call assert_equal(1, len(l))
+  call assert_equal('Editor:VIM vim', l[0].text)
+
+  edit +3 Xtestfile2
+  Xvimgrep +\cemacs+j Xtestfile1
+  let l = g:Xgetlist()
+  call assert_equal('Xtestfile2', bufname(''))
+  call assert_equal('Editor:Emacs EmAcS', l[0].text)
+
+  call delete('Xtestfile1')
+  call delete('Xtestfile2')
+endfunc
+
+" Tests for the :vimgrep command
+func Test_vimgrep()
+  call XvimgrepTests('c')
+  call XvimgrepTests('l')
+endfunc
+
+func XfreeTests(cchar)
+  call s:setup_commands(a:cchar)
+
+  enew | only
+
+  " Deleting the quickfix stack should work even When the current list is
+  " somewhere in the middle of the stack
+  Xexpr ['Xfile1:10:10:Line 10', 'Xfile1:15:15:Line 15']
+  Xexpr ['Xfile2:20:20:Line 20', 'Xfile2:25:25:Line 25']
+  Xexpr ['Xfile3:30:30:Line 30', 'Xfile3:35:35:Line 35']
+  Xolder
+  call g:Xsetlist([], 'f')
+  call assert_equal(0, len(g:Xgetlist()))
+
+  " After deleting the stack, adding a new list should create a stack with a
+  " single list.
+  Xexpr ['Xfile1:10:10:Line 10', 'Xfile1:15:15:Line 15']
+  call assert_equal(1, g:Xgetlist({'all':1}).nr)
+
+  " Deleting the stack from a quickfix window should update/clear the
+  " quickfix/location list window.
+  Xexpr ['Xfile1:10:10:Line 10', 'Xfile1:15:15:Line 15']
+  Xexpr ['Xfile2:20:20:Line 20', 'Xfile2:25:25:Line 25']
+  Xexpr ['Xfile3:30:30:Line 30', 'Xfile3:35:35:Line 35']
+  Xolder
+  Xwindow
+  call g:Xsetlist([], 'f')
+  call assert_equal(2, winnr('$'))
+  call assert_equal(1, line('$'))
+  Xclose
+
+  " Deleting the stack from a non-quickfix window should update/clear the
+  " quickfix/location list window.
+  Xexpr ['Xfile1:10:10:Line 10', 'Xfile1:15:15:Line 15']
+  Xexpr ['Xfile2:20:20:Line 20', 'Xfile2:25:25:Line 25']
+  Xexpr ['Xfile3:30:30:Line 30', 'Xfile3:35:35:Line 35']
+  Xolder
+  Xwindow
+  wincmd p
+  call g:Xsetlist([], 'f')
+  call assert_equal(0, len(g:Xgetlist()))
+  wincmd p
+  call assert_equal(2, winnr('$'))
+  call assert_equal(1, line('$'))
+
+  " After deleting the location list stack, if the location list window is
+  " opened, then a new location list should be created. So opening the
+  " location list window again should not create a new window.
+  if a:cchar == 'l'
+      lexpr ['Xfile1:10:10:Line 10', 'Xfile1:15:15:Line 15']
+      wincmd p
+      lopen
+      call assert_equal(2, winnr('$'))
+  endif
+  Xclose
+endfunc
+
+" Tests for the quickifx free functionality
+func Test_qf_free()
+  call XfreeTests('c')
+  call XfreeTests('l')
+endfunc
+
+" Test for buffer overflow when parsing lines and adding new entries to
+" the quickfix list.
+func Test_bufoverflow()
+  set efm=%f:%l:%m
+  cgetexpr ['File1:100:' . repeat('x', 1025)]
+
+  set efm=%+GCompiler:\ %.%#,%f:%l:%m
+  cgetexpr ['Compiler: ' . repeat('a', 1015), 'File1:10:Hello World']
+
+  set efm=%DEntering\ directory\ %f,%f:%l:%m
+  cgetexpr ['Entering directory ' . repeat('a', 1006),
+	      \ 'File1:10:Hello World']
+  set efm&vim
+endfunc
+
diff --git a/src/nvim/tui/tui.c b/src/nvim/tui/tui.c
index 021bb6eac4..dbe1222dc0 100644
--- a/src/nvim/tui/tui.c
+++ b/src/nvim/tui/tui.c
@@ -70,7 +70,6 @@ typedef struct {
   UIBridgeData *bridge;
   Loop *loop;
   bool stop;
-  uv_timer_t after_startup_timer;
   unibi_var_t params[9];
   char buf[OUTBUF_SIZE];
   size_t bufpos;
@@ -291,18 +290,6 @@ static void terminfo_stop(UI *ui)
   unibi_destroy(data->ut);
 }
 
-static void after_startup_timer_cb(uv_timer_t *handle)
-  FUNC_ATTR_NONNULL_ALL
-{
-  UI *ui = handle->data;
-  TUIData *data = ui->data;
-  uv_timer_stop(&data->after_startup_timer);
-
-  // Emit this after Nvim startup, not during.  This works around a tmux
-  // 2.3 bug(?) which caused slow drawing during startup.  #7649
-  unibi_out_ext(ui, data->unibi_ext.enable_focus_reporting);
-}
-
 static void tui_terminal_start(UI *ui)
 {
   TUIData *data = ui->data;
@@ -312,8 +299,16 @@ static void tui_terminal_start(UI *ui)
   update_size(ui);
   signal_watcher_start(&data->winch_handle, sigwinch_cb, SIGWINCH);
   term_input_start(&data->input);
+}
+
+static void tui_terminal_after_startup(UI *ui)
+  FUNC_ATTR_NONNULL_ALL
+{
+  TUIData *data = ui->data;
 
-  uv_timer_start(&data->after_startup_timer, after_startup_timer_cb, 500, 0);
+  // Emit this after Nvim startup, not during.  This works around a tmux
+  // 2.3 bug(?) which caused slow drawing during startup.  #7649
+  unibi_out_ext(ui, data->unibi_ext.enable_focus_reporting);
 }
 
 static void tui_terminal_stop(UI *ui)
@@ -347,8 +342,6 @@ static void tui_main(UIBridgeData *bridge, UI *ui)
 #ifdef UNIX
   signal_watcher_start(&data->cont_handle, sigcont_cb, SIGCONT);
 #endif
-  uv_timer_init(&data->loop->uv, &data->after_startup_timer);
-  data->after_startup_timer.data = ui;
 
 #if TERMKEY_VERSION_MAJOR > 0 || TERMKEY_VERSION_MINOR > 18
   data->input.tk_ti_hook_fn = tui_tk_ti_getstr;
@@ -363,11 +356,21 @@ static void tui_main(UIBridgeData *bridge, UI *ui)
   loop_schedule_deferred(&main_loop,
                          event_create(show_termcap_event, 1, data->ut));
 
+  // "Active" loop: first ~100 ms of startup.
+  for (size_t ms = 0; ms < 100 && !data->stop;) {
+    ms += (loop_poll_events(&tui_loop, 20) ? 20 : 1);
+  }
+  if (!data->stop) {
+    tui_terminal_after_startup(ui);
+    // Tickle `main_loop` with a dummy event, else the initial "focus-gained"
+    // terminal response may not get processed until user hits a key.
+    loop_schedule_deferred(&main_loop, event_create(tui_dummy_event, 0));
+  }
+  // "Passive" (I/O-driven) loop: TUI thread "main loop".
   while (!data->stop) {
     loop_poll_events(&tui_loop, -1);  // tui_loop.events is never processed
   }
 
-  uv_close((uv_handle_t *)&data->after_startup_timer, NULL);
   ui_bridge_stopped(bridge);
   term_input_destroy(&data->input);
   signal_watcher_stop(&data->cont_handle);
@@ -379,6 +382,10 @@ static void tui_main(UIBridgeData *bridge, UI *ui)
   xfree(ui);
 }
 
+static void tui_dummy_event(void **argv)
+{
+}
+
 static void tui_scheduler(Event event, void *d)
 {
   UI *ui = d;
@@ -1100,6 +1107,7 @@ static void suspend_event(void **argv)
     loop_poll_events(data->loop, -1);
   }
   tui_terminal_start(ui);
+  tui_terminal_after_startup(ui);
   if (enable_mouse) {
     tui_mouse_on(ui);
   }
diff --git a/test/functional/helpers.lua b/test/functional/helpers.lua
index f939567693..bff8d065f8 100644
--- a/test/functional/helpers.lua
+++ b/test/functional/helpers.lua
@@ -614,7 +614,7 @@ local function new_pipename()
 end
 
 local function missing_provider(provider)
-  if provider == 'ruby' then
+  if provider == 'ruby' or provider == 'node' then
     local prog = funcs['provider#' .. provider .. '#Detect']()
     return prog == '' and (provider .. ' not detected') or false
   elseif provider == 'python' or provider == 'python3' then
diff --git a/test/functional/provider/nodejs_spec.lua b/test/functional/provider/nodejs_spec.lua
new file mode 100644
index 0000000000..0a12b1a154
--- /dev/null
+++ b/test/functional/provider/nodejs_spec.lua
@@ -0,0 +1,61 @@
+local helpers = require('test.functional.helpers')(after_each)
+local eq, clear = helpers.eq, helpers.clear
+local missing_provider = helpers.missing_provider
+local command = helpers.command
+local write_file = helpers.write_file
+local eval = helpers.eval
+local retry = helpers.retry
+
+do
+  clear()
+  if missing_provider('node') then
+    pending("Missing nodejs host, or nodejs version is too old.", function()end)
+    return
+  end
+end
+
+before_each(function()
+  clear()
+  command([[let $NODE_PATH = get(split(system('npm root -g'), "\n"), 0, '')]])
+end)
+
+describe('nodejs host', function()
+  teardown(function ()
+    os.remove('Xtest-nodejs-hello.js')
+    os.remove('Xtest-nodejs-hello-plugin.js')
+  end)
+
+  it('works', function()
+    local fname = 'Xtest-nodejs-hello.js'
+    write_file(fname, [[
+      const socket = process.env.NVIM_LISTEN_ADDRESS;
+      const neovim = require('neovim');
+      const nvim = neovim.attach({socket: socket});
+      nvim.command('let g:job_out = "hello"');
+      nvim.command('call jobstop(g:job_id)');
+    ]])
+    command('let g:job_id = jobstart(["node", "'..fname..'"])')
+    retry(nil, 1000, function() eq('hello', eval('g:job_out')) end)
+  end)
+  it('plugin works', function()
+    local fname = 'Xtest-nodejs-hello-plugin.js'
+    write_file(fname, [[
+      const socket = process.env.NVIM_LISTEN_ADDRESS;
+      const neovim = require('neovim');
+      const nvim = neovim.attach({socket: socket});
+
+      class TestPlugin {
+          hello() {
+              this.nvim.command('let g:job_out = "hello-plugin"')
+          }
+      }
+
+      const PluginClass = neovim.Plugin(TestPlugin);
+      const plugin = new PluginClass(nvim);
+      plugin.hello();
+      nvim.command('call jobstop(g:job_id)');
+    ]])
+    command('let g:job_id = jobstart(["node", "'..fname..'"])')
+    retry(nil, 1000, function() eq('hello-plugin', eval('g:job_out')) end)
+  end)
+end)
diff --git a/test/functional/provider/ruby_spec.lua b/test/functional/provider/ruby_spec.lua
index c70f90da1c..a2c6c6a10e 100644
--- a/test/functional/provider/ruby_spec.lua
+++ b/test/functional/provider/ruby_spec.lua
@@ -15,9 +15,7 @@ local missing_provider = helpers.missing_provider
 do
   clear()
   if missing_provider('ruby') then
-    pending(
-      "Cannot find the neovim RubyGem. Try :checkhealth",
-      function() end)
+    pending("Missing neovim RubyGem.", function() end)
     return
   end
 end
diff --git a/third-party/CMakeLists.txt b/third-party/CMakeLists.txt
index ab9ff1f60d..66f921ffcc 100644
--- a/third-party/CMakeLists.txt
+++ b/third-party/CMakeLists.txt
@@ -103,8 +103,8 @@ set(LUA_SHA256 2640fc56a795f29d28ef15e13c34a47e223960b0240e8cb0a82d9b0738695333)
 set(LUAROCKS_URL https://github.com/luarocks/luarocks/archive/v2.4.2.tar.gz)
 set(LUAROCKS_SHA256 eef88c2429c715a7beb921e4b1ba571dddb7c74a250fbb0d3cc0d4be7a5865d9)
 
-set(UNIBILIUM_URL https://github.com/mauke/unibilium/archive/v1.2.0.tar.gz)
-set(UNIBILIUM_SHA256 623af1099515e673abfd3cae5f2fa808a09ca55dda1c65a7b5c9424eb304ead8)
+set(UNIBILIUM_URL https://github.com/mauke/unibilium/archive/v1.2.1.tar.gz)
+set(UNIBILIUM_SHA256 6045b4f6adca7b1123284007675ca71f718f70942d3a93d8b9fa5bd442006ec1)
 
 if(WIN32)
 set(LIBTERMKEY_URL https://github.com/equalsraf/libtermkey/archive/tb-windows.zip)