patch 9.1.0112: Remove undo information, when cleaning quickfix buffer
Problem: When the quickfix buffer has been modified an autocommand
may invalidate the undo stack (kawarimidoll)
Solution: When clearing the quickfix buffer, also wipe the undo stack
fixes: #13905
closes: #13928
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index 6e12232..90dc3c1 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -4413,4 +4413,32 @@
delfunc SetupVimTest_shm
endfunc
+func Test_autocmd_invalidates_undo_on_textchanged()
+ CheckRunVimInTerminal
+ let script =<< trim END
+ set hidden
+ " create quickfix list (at least 2 lines to move line)
+ vimgrep /u/j %
+
+ " enter quickfix window
+ cwindow
+
+ " set modifiable
+ setlocal modifiable
+
+ " set autocmd to clear quickfix list
+
+ autocmd! TextChanged <buffer> call setqflist([])
+ " move line
+ move+1
+ END
+ call writefile(script, 'XTest_autocmd_invalidates_undo_on_textchanged', 'D')
+ let buf = RunVimInTerminal('XTest_autocmd_invalidates_undo_on_textchanged', {'rows': 20})
+ call term_sendkeys(buf, ":so %\<cr>")
+ call term_sendkeys(buf, "G")
+ call WaitForAssert({-> assert_match('^XTest_autocmd_invalidates_undo_on_textchanged\s*$', term_getline(buf, 20))}, 1000)
+
+ call StopVimInTerminal(buf)
+endfunc
+
" vim: shiftwidth=2 sts=2 expandtab