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vim-patch:8.0.1402: crash with nasty autocommand

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Problem:    Crash with nasty autocommand. (gy741, Dominique Pelle)
Solution:   Check that the new current buffer isn't wiped out. (closes vim/vim#2447)

9bca805ec4
This commit is contained in:
Justin M. Keyes 2018-02-02 02:56:28 +01:00
parent e578d586f2
commit 5ae90c84ea
2 changed files with 13 additions and 5 deletions
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15
src/nvim/buffer.c
View File

@ -1387,20 +1387,25 @@ void set_curbuf(buf_T *buf, int action)
/* Don't restart Select mode after switching to another buffer. */
VIsual_reselect = FALSE;
/* close_windows() or apply_autocmds() may change curbuf */
// close_windows() or apply_autocmds() may change curbuf and wipe out "buf"
prevbuf = curbuf;
bufref_T bufref;
set_bufref(&bufref, prevbuf);
bufref_T newbufref;
bufref_T prevbufref;
set_bufref(&prevbufref, prevbuf);
set_bufref(&newbufref, buf);
// Autocommands may delete the curren buffer and/or the buffer we wan to go
// to. In those cases don't close the buffer.
if (!apply_autocmds(EVENT_BUFLEAVE, NULL, NULL, false, curbuf)
|| (bufref_valid(&bufref) && !aborting())) {
|| (bufref_valid(&prevbufref) && bufref_valid(&newbufref)
&& !aborting())) {
if (prevbuf == curwin->w_buffer) {
reset_synblock(curwin);
}
if (unload) {
close_windows(prevbuf, false);
}
if (bufref_valid(&bufref) && !aborting()) {
if (bufref_valid(&prevbufref) && !aborting()) {
win_T *previouswin = curwin;
if (prevbuf == curbuf)
u_sync(FALSE);

3
src/nvim/testdir/test_autocmd.vim
View File

@ -434,6 +434,7 @@ func s:AutoCommandOptionSet(match)
endfunc
func Test_OptionSet()
throw 'skipped: Nvim does not support test_override()'
if !has("eval") || !has("autocmd") || !exists("+autochdir")
return
endif
@ -573,6 +574,7 @@ func Test_OptionSet()
endfunc
func Test_OptionSet_diffmode()
throw 'skipped: Nvim does not support test_override()'
call test_override('starting', 1)
" 18: Changing an option when enetering diff mode
new
@ -606,6 +608,7 @@ func Test_OptionSet_diffmode()
endfunc
func Test_OptionSet_diffmode_close()
throw 'skipped: Nvim does not support test_override()'
call test_override('starting', 1)
" 19: Try to close the current window when entering diff mode
" should not segfault