patch 8.2.2036: buffer messed up if creating the quickfix window fails
Problem: Current buffer is messed up if creating a new buffer for the
quickfix window fails.
Solution: Check that creating the buffer succeeds. (closes #7352)
diff --git a/src/testdir/dumps/Test_quickfix_window_fails.dump b/src/testdir/dumps/Test_quickfix_window_fails.dump
new file mode 100644
index 0000000..769e30a
--- /dev/null
+++ b/src/testdir/dumps/Test_quickfix_window_fails.dump
@@ -0,0 +1,13 @@
+|a+0&#ffffff0|n|y|t|h|i|n|g| @66
+> @74
+|t|r|y| @71
+|X+3&&|q|u|i|c|k|f|i|x|F|a|i|l|s| |[|+|]| @38|2|,|0|-|1| @9|T|o|p
+| +0&&@74
+|t|r|y| @71
+@2|a|n|y|t|h|i|n|g| @64
+|X+1&&|q|u|i|c|k|f|i|x|F|a|i|l|s| |[|+|]| @38|2|,|0|-|1| @9|5|0|%
+| +0&&@74
+|~+0#4040ff13&| @73
+|~| @73
+|[+1#0000000&|N|o| |N|a|m|e|]| @47|0|,|0|-|1| @9|A|l@1
+| +0&&@74
diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index cbdc610..759cb0d 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -5218,4 +5218,39 @@
cclose
endfunc
+" Test for very weird problem: autocommand causes a failure, resulting opening
+" the quickfix window to fail. This still splits the window, but otherwise
+" should not mess up buffers.
+func Test_quickfix_window_fails_to_open()
+ CheckScreendump
+
+ let lines =<< trim END
+ anything
+ try
+ anything
+ endtry
+ END
+ call writefile(lines, 'XquickfixFails')
+
+ let lines =<< trim END
+ split XquickfixFails
+ silent vimgrep anything %
+ normal o
+ au BufLeave * ++once source XquickfixFails
+ " This will trigger the autocommand, which causes an error, what follows
+ " is aborted but the window was already split.
+ silent! cwindow
+ END
+ call writefile(lines, 'XtestWinFails')
+ let buf = RunVimInTerminal('-S XtestWinFails', #{rows: 13})
+ call VerifyScreenDump(buf, 'Test_quickfix_window_fails', {})
+
+ " clean up
+ call term_sendkeys(buf, ":bwipe!\<CR>")
+ call term_wait(buf)
+ call StopVimInTerminal(buf)
+ call delete('XtestWinFails')
+ call delete('XquickfixFails')
+endfunc
+
" vim: shiftwidth=2 sts=2 expandtab