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patch 9.1.0149: null pointer member access when accessing 'winfixbuf' property

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Problem:  qf_goto_win_with_qfl_file may check if prevwin has 'winfixbuf'
          set without checking if it's valid first.
Solution: Reverse the condition. Add a test, a modeline, and a missing
          CheckFeature. (Searn Dewar)

closes: #14140

Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Sean Dewar
2024-03-04 19:09:26 +01:00
committed by Christian Brabandt
parent e84490311b
commit 5131f224da
3 changed files with 22 additions and 1 deletions
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2
src/quickfix.c
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@@ -3146,7 +3146,7 @@ qf_goto_win_with_qfl_file(int qf_fnum)
// Didn't find it, go to the window before the quickfix
// window, unless 'switchbuf' contains 'uselast': in this case we
// try to jump to the previously used window first.
if ((swb_flags & SWB_USELAST) && !prevwin->w_p_wfb && win_valid(prevwin))
if ((swb_flags & SWB_USELAST) && win_valid(prevwin) && !prevwin->w_p_wfb)
win = prevwin;
else if (altwin != NULL)
win = altwin;