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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 #2447)
This commit is contained in:
Bram Moolenaar
2017-12-18 12:37:55 +01:00
parent cb89c98c26
commit 9bca805ec4
3 changed files with 24 additions and 9 deletions
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23
src/buffer.c
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@@ -1665,7 +1665,8 @@ set_curbuf(buf_T *buf, int action)
#ifdef FEAT_SYN_HL
long old_tw = curbuf->b_p_tw;
#endif
bufref_T bufref;
bufref_T newbufref;
bufref_T prevbufref;
setpcmark();
if (!cmdmod.keepalt)
@@ -1675,18 +1676,22 @@ 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;
set_bufref(&bufref, prevbuf);
set_bufref(&prevbufref, prevbuf);
set_bufref(&newbufref, buf);
#ifdef FEAT_AUTOCMD
/* 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(&prevbufref)
&& bufref_valid(&newbufref)
# ifdef FEAT_EVAL
|| (bufref_valid(&bufref) && !aborting())
# else
|| bufref_valid(&bufref)
&& !aborting()
# endif
)
))
#endif
{
#ifdef FEAT_SYN_HL
@@ -1696,9 +1701,9 @@ set_curbuf(buf_T *buf, int action)
if (unload)
close_windows(prevbuf, FALSE);
#if defined(FEAT_AUTOCMD) && defined(FEAT_EVAL)
if (bufref_valid(&bufref) && !aborting())
if (bufref_valid(&prevbufref) && !aborting())
#else
if (bufref_valid(&bufref))
if (bufref_valid(&prevbufref))
#endif
{
win_T *previouswin = curwin;