From 287153c5d481a09ffe98a95ad78390ff580bb557 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sun, 29 Nov 2020 14:20:27 +0100
Subject: patch 8.2.2069: the quickfix window is not updated after setqflist()

Problem:    The quickfix window is not updated after setqflist().
Solution:   Update the quickfix buffer. (Yegappan Lakshmanan, closes #7390,
            closes #7385)
---
 src/quickfix.c                |  6 +++--
 src/testdir/test_quickfix.vim | 58 +++++++++++++++++++++++++++++++++++++++++++
 src/version.c                 |  2 ++
 3 files changed, 64 insertions(+), 2 deletions(-)

diff --git a/src/quickfix.c b/src/quickfix.c
index 5e46ad2e9..d7a163dff 100644
--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -7349,7 +7349,7 @@ qf_setprop_items_from_lines(
     if (action == 'r')
 	qf_free_items(&qi->qf_lists[qf_idx]);
     if (qf_init_ext(qi, qf_idx, NULL, NULL, &di->di_tv, errorformat,
-		FALSE, (linenr_T)0, (linenr_T)0, NULL, NULL) > 0)
+		FALSE, (linenr_T)0, (linenr_T)0, NULL, NULL) >= 0)
 	retval = OK;
 
     return retval;
@@ -7474,8 +7474,10 @@ qf_set_properties(qf_info_T *qi, dict_T *what, int action, char_u *title)
     if ((di = dict_find(what, (char_u *)"quickfixtextfunc", -1)) != NULL)
 	retval = qf_setprop_qftf(qi, qfl, di);
 
-    if (retval == OK)
+    if (newlist || retval == OK)
 	qf_list_changed(qfl);
+    if (newlist)
+	qf_update_buffer(qi, NULL);
 
     return retval;
 }
diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index 759cb0d74..78fd6c90f 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -5253,4 +5253,62 @@ func Test_quickfix_window_fails_to_open()
   call delete('XquickfixFails')
 endfunc
 
+" Test for updating the quickfix buffer whenever the assocaited quickfix list
+" is changed.
+func Xqfbuf_update(cchar)
+  call s:setup_commands(a:cchar)
+
+  Xexpr "F1:1:line1"
+  Xopen
+  call assert_equal(['F1|1| line1'], getline(1, '$'))
+  call assert_equal(1, g:Xgetlist({'changedtick' : 0}).changedtick)
+
+  " Test setqflist() using the 'lines' key in 'what'
+  " add a new entry
+  call g:Xsetlist([], 'a', {'lines' : ['F2:2: line2']})
+  call assert_equal(['F1|1| line1', 'F2|2| line2'], getline(1, '$'))
+  call assert_equal(2, g:Xgetlist({'changedtick' : 0}).changedtick)
+  " replace all the entries with a single entry
+  call g:Xsetlist([], 'r', {'lines' : ['F3:3: line3']})
+  call assert_equal(['F3|3| line3'], getline(1, '$'))
+  call assert_equal(3, g:Xgetlist({'changedtick' : 0}).changedtick)
+  " remove all the entries
+  call g:Xsetlist([], 'r', {'lines' : []})
+  call assert_equal([''], getline(1, '$'))
+  call assert_equal(4, g:Xgetlist({'changedtick' : 0}).changedtick)
+  " add a new list
+  call g:Xsetlist([], ' ', {'lines' : ['F4:4: line4']})
+  call assert_equal(['F4|4| line4'], getline(1, '$'))
+  call assert_equal(1, g:Xgetlist({'changedtick' : 0}).changedtick)
+
+  " Test setqflist() using the 'items' key in 'what'
+  " add a new entry
+  call g:Xsetlist([], 'a', {'items' : [{'filename' : 'F5', 'lnum' : 5, 'text' : 'line5'}]})
+  call assert_equal(['F4|4| line4', 'F5|5| line5'], getline(1, '$'))
+  call assert_equal(2, g:Xgetlist({'changedtick' : 0}).changedtick)
+  " replace all the entries with a single entry
+  call g:Xsetlist([], 'r', {'items' : [{'filename' : 'F6', 'lnum' : 6, 'text' : 'line6'}]})
+  call assert_equal(['F6|6| line6'], getline(1, '$'))
+  call assert_equal(3, g:Xgetlist({'changedtick' : 0}).changedtick)
+  " remove all the entries
+  call g:Xsetlist([], 'r', {'items' : []})
+  call assert_equal([''], getline(1, '$'))
+  call assert_equal(4, g:Xgetlist({'changedtick' : 0}).changedtick)
+  " add a new list
+  call g:Xsetlist([], ' ', {'items' : [{'filename' : 'F7', 'lnum' : 7, 'text' : 'line7'}]})
+  call assert_equal(['F7|7| line7'], getline(1, '$'))
+  call assert_equal(1, g:Xgetlist({'changedtick' : 0}).changedtick)
+
+  call g:Xsetlist([], ' ', {})
+  call assert_equal([''], getline(1, '$'))
+  call assert_equal(1, g:Xgetlist({'changedtick' : 0}).changedtick)
+
+  Xclose
+endfunc
+
+func Test_qfbuf_update()
+  call Xqfbuf_update('c')
+  call Xqfbuf_update('l')
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
index 292872260..6e9dfbcd9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2069,
 /**/
     2068,
 /**/
-- 
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