vim-patch:8.0.0580: cannot set the valid flag with setqflist()

Problem:    Cannot set the valid flag with setqflist().
Solution:   Add the "valid" argument. (Yegappan Lakshmanan, closes vim/vim#1642)

https://github.com/vim/vim/commit/f1d21c8cc83f40c815b6bf13cd2043152db533ee

2 files changed, 24 insertions, 0 deletions

diff --git a/src/nvim/quickfix.c b/src/nvim/quickfix.c
index ee3bb1dfba..d77cec4fd8 100644
--- a/src/nvim/quickfix.c
+++ b/src/nvim/quickfix.c
@@ -4189,6 +4189,11 @@ 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,
diff --git a/src/nvim/testdir/test_quickfix.vim b/src/nvim/testdir/test_quickfix.vim
index 7e4100cca0..dd64e37ce3 100644
--- a/src/nvim/testdir/test_quickfix.vim
+++ b/src/nvim/testdir/test_quickfix.vim
@@ -1183,6 +1183,25 @@ func SetXlistTests(cchar, bnum)
   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}," .