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patch 8.1.2197: ExitPre autocommand may cause accessing freed memory

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Problem:    ExitPre autocommand may cause accessing freed memory.
Solution:   Check the window pointer is still valid. (closes #5093)
This commit is contained in:
Bram Moolenaar
2019-10-20 22:27:10 +02:00
parent d53ebfc624
commit 34ba06b6e6
3 changed files with 31 additions and 6 deletions
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22
src/testdir/test_exit.vim
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@@ -40,6 +40,7 @@ func Test_exiting()
endif
call delete('Xtestout')
" ExitPre autocommand splits the window, so that it's no longer the last one.
let after =<< trim [CODE]
au QuitPre * call writefile(["QuitPre"], "Xtestout", "a")
au ExitPre * call writefile(["ExitPre"], "Xtestout", "a")
@@ -58,4 +59,25 @@ func Test_exiting()
\ readfile('Xtestout'))
endif
call delete('Xtestout')
" ExitPre autocommand splits and closes the window, so that there is still
" one window but it's a different one.
let after =<< trim [CODE]
au QuitPre * call writefile(["QuitPre"], "Xtestout", "a")
au ExitPre * call writefile(["ExitPre"], "Xtestout", "a")
augroup nasty
au ExitPre * split | only
augroup END
quit
augroup nasty
au! ExitPre
augroup END
quit
[CODE]
if RunVim([], after, '')
call assert_equal(['QuitPre', 'ExitPre', 'QuitPre', 'ExitPre'],
\ readfile('Xtestout'))
endif
call delete('Xtestout')
endfunc