From: Lars Ingebrigtsen <larsi@gnus.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: rhstanton@berkeley.edu, 54996@debbugs.gnu.org
Subject: bug#54996: Emacs hangs when editing Python code with debug-on-error set to t
Date: Mon, 18 Apr 2022 11:45:30 +0200 [thread overview]
Message-ID: <87fsmak9mt.fsf@gnus.org> (raw)
In-Reply-To: <83mtgjvt84.fsf@gnu.org> (Eli Zaretskii's message of "Mon, 18 Apr 2022 08:46:51 +0300")
Eli Zaretskii <eliz@gnu.org> writes:
> And I cannot reproduce at all. Does the recipe involve the Python
> interpreter in any way? If so, that might be the reason why it
> doesn't reproduce here.
Nope, just font locking.
> It is also not clear to me whether I should insert ‘ or ' (I tried
> both).
It's '
>> But it's bizarre that the debug-on-error setting should affect this.
>> I've skimmed through python.el looking for anything obvious (like a
>> `condition-case-unless-debug' but can't find anything).
>
> Calling a debugger triggers a redisplay cycle, and maybe that explains
> the problem.
Hm, yes...
>> The culprit must be in python-syntax-stringify -- if I just remove that,
>> the hang is gone. But there's no odd error handling there that I can
>> see (unless it's hiding in syntax-ppss)... anybody got any ideas?
>
> Catching a backtrace on the C level might explain what happens. But
> since I cannot reproduce the problem, I cannot show such a backtrace,
> either.
Do you have any suggestions about where to put a breakpoint? I tried to
put a breakpoint on call_debugger, but nothing...
My test case is:
gdb --args ./src/emacs -geometry -0+0 --eval "(setq debug-on-error t)" -Q /tmp/foo.py
with foo.py containing just that triple-quoted string.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
next prev parent reply other threads:[~2022-04-18 9:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-17 20:16 bug#54996: Emacs hangs when editing Python code with debug-on-error set to t Richard Stanton
2022-04-17 20:43 ` Lars Ingebrigtsen
2022-04-18 5:46 ` Eli Zaretskii
2022-04-18 9:45 ` Lars Ingebrigtsen [this message]
2022-04-18 10:02 ` Eli Zaretskii
2022-04-18 11:07 ` Lars Ingebrigtsen
2022-04-18 11:18 ` Lars Ingebrigtsen
2022-04-18 14:17 ` Philipp Stephani
2022-04-18 14:23 ` Lars Ingebrigtsen
2022-04-18 10:56 ` Daniel Martín via Bug reports for GNU Emacs, the Swiss army knife of text editors
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