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vim-patch:8.2.2163: crash when discarded exception is the current exception

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Problem:    Crash when discarded exception is the current exception.
Solution:   Compare the execption with current_exception. (closes vim/vim#7499)
13656f02e4
This commit is contained in:
Jan Edmund Lazo
2020-12-19 21:31:23 -05:00
parent 6ee8964d46
commit e465157ecd
1 changed files with 18 additions and 17 deletions
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35
src/nvim/ex_eval.c
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@@ -518,10 +518,13 @@ fail:
* Discard an exception. "was_finished" is set when the exception has been
* caught and the catch clause has been ended normally.
*/
static void discard_exception(except_T *excp, int was_finished)
static void discard_exception(except_T *excp, bool was_finished)
{
char_u *saved_IObuff;
if (current_exception == excp) {
current_exception = NULL;
}
if (excp == NULL) {
internal_error("discard_exception()");
return;
@@ -569,7 +572,6 @@ void discard_current_exception(void)
{
if (current_exception != NULL) {
discard_exception(current_exception, false);
current_exception = NULL;
}
// Note: all globals manipulated here should be saved/restored in
// try_enter/try_leave.
@@ -652,8 +654,8 @@ static void finish_exception(except_T *excp)
set_vim_var_string(VV_THROWPOINT, NULL, -1);
}
/* Discard the exception, but use the finish message for 'verbose'. */
discard_exception(excp, TRUE);
// Discard the exception, but use the finish message for 'verbose'.
discard_exception(excp, true);
}
/*
@@ -1812,11 +1814,12 @@ void leave_cleanup(cleanup_T *csp)
* made pending by it. Report this to the user if required by the
* 'verbose' option or when debugging. */
if (aborting() || need_rethrow) {
if (pending & CSTP_THROW)
/* Cancel the pending exception (includes report). */
discard_exception(csp->exception, FALSE);
else
if (pending & CSTP_THROW) {
// Cancel the pending exception (includes report).
discard_exception(csp->exception, false);
} else {
report_discard_pending(pending, NULL);
}
/* If an error was about to be converted to an exception when
* enter_cleanup() was called, free the message list. */
@@ -1916,15 +1919,13 @@ int cleanup_conditionals(cstack_T *cstack, int searched_cond, int inclusive)
default:
if (cstack->cs_flags[idx] & CSF_FINALLY) {
if (cstack->cs_pending[idx] & CSTP_THROW) {
/* Cancel the pending exception. This is in the
* finally clause, so that the stack of the
* caught exceptions is not involved. */
discard_exception((except_T *)
cstack->cs_exception[idx],
FALSE);
} else
report_discard_pending(cstack->cs_pending[idx],
NULL);
// Cancel the pending exception. This is in the
// finally clause, so that the stack of the
// caught exceptions is not involved.
discard_exception((except_T *)cstack->cs_exception[idx], false);
} else {
report_discard_pending(cstack->cs_pending[idx], NULL);
}
cstack->cs_pending[idx] = CSTP_NONE;
}
break;