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Re: C-g crash redux
From: |
Chong Yidong |
Subject: |
Re: C-g crash redux |
Date: |
Thu, 03 Aug 2006 11:13:39 -0400 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
>> Emacs can be made to crash simply by evaluating (sit-for 4) in the scratch
>> buffer and typing C-g before four seconds elapse.
>>
>> It's due to this change:
>>
>> 2006-08-01 Kim F. Storm <address@hidden>
>>
>> * process.c (wait_reading_process_output_unwind): New function.
>> Restores waiting_for_user_input_p to saved value.
>> (wait_reading_process_output): Unwind protect waiting_for_user_input_p
>> instead of save/restore old value on stack.
>>
>> Presumably wait_reading_process_output is interrupted before it can do:
>>
>> unbind_to (count, Qnil);
>
> Huh? Is that really possible?
>
> What kind of interrupt can cause unwind_protect forms NOT to be run?
Typing C-g, which runs interrupt_signal, runs quit_throw_to_read_char
instead of Fsignal during when waiting_for_input is set (as it is
during wait_reading_process_output). If I understand correctly, the
purpose is to enable read-char to return a `C-g' character; and that's
why it's both undesirable and unnecesssary to use a
record_unwind_protect inside wait_reading_process_output.
I'll go ahead and revert the 2006-08-01 change.
- C-g crash redux, Romain Francoise, 2006/08/02
- Re: C-g crash redux, Nick Roberts, 2006/08/02
- Re: C-g crash redux, Kim F. Storm, 2006/08/02
- Re: C-g crash redux, Nick Roberts, 2006/08/02
- Re: C-g crash redux,
Chong Yidong <=
- Re: C-g crash redux, Kim F. Storm, 2006/08/03
- Re: C-g crash redux, Chong Yidong, 2006/08/03
- Re: C-g crash redux, Nick Roberts, 2006/08/03
- Re: C-g crash redux, Kim F. Storm, 2006/08/04
- Re: C-g crash redux, Chong Yidong, 2006/08/04
- Re: C-g crash redux, Chong Yidong, 2006/08/04
- Re: C-g crash redux, Richard Stallman, 2006/08/04
- Re: C-g crash redux, Nick Roberts, 2006/08/04
- Re: C-g crash redux, Kim F. Storm, 2006/08/04
- Re: C-g crash redux, David Kastrup, 2006/08/06