Patch 8.0.0702
Problem: An error in a timer can make Vim unusable.
Solution: Don't set the error flag or exception from a timer. Stop a timer
if it causes an error 3 out of 3 times. Discard an exception
caused inside a timer.
Files: src/ex_cmds2.c, src/structs.h, src/testdir/test_timers.vim,
runtime/doc/eval.txt
*** ../vim-8.0.0701/src/ex_cmds2.c 2017-07-07 14:50:40.919158114 +0200
--- src/ex_cmds2.c 2017-07-08 22:25:28.836619866 +0200
***************
*** 1197,1207 ****
long current_id = last_timer_id;
# ifdef WIN3264
LARGE_INTEGER fr;
! /* Don't run any timers while exiting. */
! if (exiting)
return next_due;
QueryPerformanceFrequency(&fr);
# endif
profile_start(&now);
--- 1197,1209 ----
long current_id = last_timer_id;
# ifdef WIN3264
LARGE_INTEGER fr;
+ # endif
! /* Don't run any timers while exiting or dealing with an error. */
! if (exiting || aborting())
return next_due;
+ # ifdef WIN3264
QueryPerformanceFrequency(&fr);
# endif
profile_start(&now);
***************
*** 1216,1224 ****
--- 1218,1230 ----
{
int save_timer_busy = timer_busy;
int save_vgetc_busy = vgetc_busy;
+ int did_emsg_save = did_emsg;
+ int called_emsg_save = called_emsg;
+ int did_throw_save = did_throw;
timer_busy = timer_busy > 0 || vgetc_busy > 0;
vgetc_busy = 0;
+ called_emsg = FALSE;
timer->tr_firing = TRUE;
timer_callback(timer);
timer->tr_firing = FALSE;
***************
*** 1226,1235 ****
did_one = TRUE;
timer_busy = save_timer_busy;
vgetc_busy = save_vgetc_busy;
/* Only fire the timer again if it repeats and stop_timer() wasn't
* called while inside the callback (tr_id == -1). */
! if (timer->tr_repeat != 0 && timer->tr_id != -1)
{
profile_setlimit(timer->tr_interval, &timer->tr_due);
this_due = GET_TIMEDIFF(timer, now);
--- 1232,1250 ----
did_one = TRUE;
timer_busy = save_timer_busy;
vgetc_busy = save_vgetc_busy;
+ if (called_emsg)
+ {
+ ++timer->tr_emsg_count;
+ if (!did_throw_save && current_exception != NULL)
+ discard_current_exception();
+ }
+ did_emsg = did_emsg_save;
+ called_emsg = called_emsg_save;
/* Only fire the timer again if it repeats and stop_timer() wasn't
* called while inside the callback (tr_id == -1). */
! if (timer->tr_repeat != 0 && timer->tr_id != -1
! && timer->tr_emsg_count < 3)
{
profile_setlimit(timer->tr_interval, &timer->tr_due);
this_due = GET_TIMEDIFF(timer, now);
*** ../vim-8.0.0701/src/structs.h 2017-07-07 11:53:29.507876589 +0200
--- src/structs.h 2017-07-08 17:24:30.875940359 +0200
***************
*** 3243,3248 ****
--- 3243,3249 ----
long tr_interval; /* msec */
char_u *tr_callback; /* allocated */
partial_T *tr_partial;
+ int tr_emsg_count;
#endif
};
*** ../vim-8.0.0701/src/testdir/test_timers.vim 2017-06-24 16:03:02.751998272
+0200
--- src/testdir/test_timers.vim 2017-07-08 17:53:08.022644231 +0200
***************
*** 189,192 ****
--- 189,210 ----
call assert_equal('hello', g:val)
endfunc
+ func FuncWithError(timer)
+ let g:call_count += 1
+ if g:call_count == 4
+ return
+ endif
+ doesnotexist
+ endfunc
+
+ func Test_timer_errors()
+ let g:call_count = 0
+ let timer = timer_start(10, 'FuncWithError', {'repeat': -1})
+ " Timer will be stopped after failing 3 out of 3 times.
+ call WaitFor('g:call_count == 3')
+ sleep 50m
+ call assert_equal(3, g:call_count)
+ endfunc
+
+
" vim: shiftwidth=2 sts=2 expandtab
*** ../vim-8.0.0701/runtime/doc/eval.txt 2017-06-28 21:26:24.122302194
+0200
--- runtime/doc/eval.txt 2017-07-08 22:33:53.324688990 +0200
***************
*** 8009,8014 ****
--- 8017,8026 ----
"repeat" Number of times to repeat calling the
callback. -1 means forever. When not present
the callback will be called once.
+ If the timer causes an error three times in a
+ row the repeat is cancelled. This avoids that
+ Vim becomes unusable because of all the error
+ messages.
Example: >
func MyHandler(timer)
*** ../vim-8.0.0701/src/version.c 2017-07-08 17:03:15.373760938 +0200
--- src/version.c 2017-07-08 22:31:58.817580630 +0200
***************
*** 766,767 ****
--- 766,769 ----
{ /* Add new patch number below this line */
+ /**/
+ 702,
/**/
--
hundred-and-one symptoms of being an internet addict:
128. You can access the Net -- via your portable and cellular phone.
/// Bram Moolenaar -- b...@moolenaar.net -- http://www.Moolenaar.net \\\
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