5 files changed, 65 insertions, 11 deletions
diff --git a/src/nvim/ex_cmds2.c b/src/nvim/ex_cmds2.c
index f8c470f213..df6b575c1c 100644
--- a/src/nvim/ex_cmds2.c
+++ b/src/nvim/ex_cmds2.c
@@ -2623,23 +2623,31 @@ theend:
   xfree(ffname);
 }
 
-static bool did_source_packages = false;
+/// Add all packages in the "start" directory to 'runtimepath'.
+void add_pack_start_dirs(void)
+{
+  do_in_path(p_pp, (char_u *)"pack/*/start/*", DIP_ALL + DIP_DIR,  // NOLINT
+             add_pack_plugin, &APP_ADD_DIR);
+}
+
+/// Load plugins from all packages in the "start" directory.
+void load_start_packages(void)
+{
+  did_source_packages = true;
+  do_in_path(p_pp, (char_u *)"pack/*/start/*", DIP_ALL + DIP_DIR,  // NOLINT
+             add_pack_plugin, &APP_LOAD);
+}
 
 // ":packloadall"
 // Find plugins in the package directories and source them.
-// "eap" is NULL when invoked during startup.
 void ex_packloadall(exarg_T *eap)
 {
-  if (!did_source_packages || (eap != NULL && eap->forceit)) {
-    did_source_packages = true;
-
+  if (!did_source_packages || eap->forceit) {
     // First do a round to add all directories to 'runtimepath', then load
     // the plugins. This allows for plugins to use an autoload directory
     // of another plugin.
-    do_in_path(p_pp, (char_u *)"pack/*/start/*", DIP_ALL + DIP_DIR,  // NOLINT
-               add_pack_plugin, &APP_ADD_DIR);
-    do_in_path(p_pp, (char_u *)"pack/*/start/*", DIP_ALL + DIP_DIR,  // NOLINT
-               add_pack_plugin, &APP_LOAD);
+    add_pack_start_dirs();
+    load_start_packages();
   }
 }
 
diff --git a/src/nvim/globals.h b/src/nvim/globals.h
index 13ecafcbe3..2ee72cdb6a 100644
--- a/src/nvim/globals.h
+++ b/src/nvim/globals.h
@@ -407,6 +407,9 @@ EXTERN int garbage_collect_at_exit INIT(= FALSE);
 
 /* ID of script being sourced or was sourced to define the current function. */
 EXTERN scid_T current_SID INIT(= 0);
+
+EXTERN bool did_source_packages INIT(= false);
+
 // Scope information for the code that indirectly triggered the current
 // provider function call
 EXTERN struct caller_scope {
diff --git a/src/nvim/main.c b/src/nvim/main.c
index a665ad1de2..6e85fbc130 100644
--- a/src/nvim/main.c
+++ b/src/nvim/main.c
@@ -1291,10 +1291,21 @@ static void set_window_layout(mparm_T *paramp)
 static void load_plugins(void)
 {
   if (p_lpl) {
+    // First add all package directories to 'runtimepath', so that their
+    // autoload directories can be found.  Only if not done already with a
+    // :packloadall command.
+    if (!did_source_packages) {
+      add_pack_start_dirs();
+    }
+
     source_runtime((char_u *)"plugin/**/*.vim", DIP_ALL | DIP_NOAFTER);  // NOLINT
     TIME_MSG("loading plugins");
 
-    ex_packloadall(NULL);
+    // Only source "start" packages if not done already with a :packloadall
+    // command.
+    if (!did_source_packages) {
+      load_start_packages();
+    }
     TIME_MSG("loading packages");
 
     source_runtime((char_u *)"plugin/**/*.vim", DIP_ALL | DIP_AFTER);
diff --git a/src/nvim/testdir/test_startup.vim b/src/nvim/testdir/test_startup.vim
index 5a38178bd5..2dce7faded 100644
--- a/src/nvim/testdir/test_startup.vim
+++ b/src/nvim/testdir/test_startup.vim
@@ -62,6 +62,38 @@ func Test_after_comes_later()
   call delete('Xafter', 'rf')
 endfunc
 
+func Test_pack_in_rtp_when_plugins_run()
+  if !has('packages')
+    return
+  endif
+  let before = [
+	\ 'set nocp viminfo+=nviminfo',
+	\ 'set guioptions+=M',
+	\ 'let $HOME = "/does/not/exist"',
+	\ 'set loadplugins',
+	\ 'set rtp=Xhere',
+	\ 'set packpath=Xhere',
+	\ 'set nomore',
+	\ ]
+  let after = [
+	\ 'quit',
+	\ ]
+  call mkdir('Xhere/plugin', 'p')
+  call writefile(['redir! > Xtestout', 'silent set runtimepath?', 'silent! call foo#Trigger()', 'redir END'], 'Xhere/plugin/here.vim')
+  call mkdir('Xhere/pack/foo/start/foobar/autoload', 'p')
+  call writefile(['function! foo#Trigger()', 'echo "autoloaded foo"', 'endfunction'], 'Xhere/pack/foo/start/foobar/autoload/foo.vim')
+
+  if RunVim(before, after, '')
+
+    let lines = filter(readfile('Xtestout'), '!empty(v:val)')
+    call assert_match('Xhere[/\\]pack[/\\]foo[/\\]start[/\\]foobar', get(lines, 0))
+    call assert_match('autoloaded foo', get(lines, 1))
+  endif
+
+  call delete('Xtestout')
+  call delete('Xhere', 'rf')
+endfunc
+
 func Test_help_arg()
   if !has('unix') && has('gui')
     " this doesn't work with gvim on MS-Windows
diff --git a/src/nvim/version.c b/src/nvim/version.c
index d4cbf32009..3313ffdfa9 100644
--- a/src/nvim/version.c
+++ b/src/nvim/version.c
@@ -340,7 +340,7 @@ static const int included_patches[] = {
   // 615,
   614,
   // 613,
-  // 612,
+  612,
   // 611,
   // 610,
   // 609,