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bug#24358: 25.1.50; re-search-forward errors with "Variable binding dept


From: npostavs
Subject: bug#24358: 25.1.50; re-search-forward errors with "Variable binding depth exceeds max-specpdl-size"
Date: Thu, 20 Oct 2016 21:22:25 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux)

Eli Zaretskii <address@hidden> writes:
>
>> +#ifdef emacs
>> +#define STR_BASE_PTR(obj)                   \
>> +  (NILP(obj)? current_buffer->text->beg :   \
>           ^
> Please leave a blank before the left parenthesis where indicated.
> Also, another blank between the right parenthesis and the following
> question mark.
>
>> +   STRINGP (obj)? SDATA (obj) :             \
>
> Likewise here.

Damn, I can't I believe I'm still making these formatting errors,
there's got to be a way to catch these automatically.

>> +   It is used for looking up syntax properties, and also to recompute
>> +   pointers in case the object is relocated by GC.
>
> Not "by GC", but "as a side effect of calling malloc".  Maybe it's a
> good idea to also mention ralloc.c here.
>
>> +  /* Get pointers and sizes of the two strings that make up the
>> +     visible portion of the buffer.  Note that we can use pointers
>> +     here, unlike in search_buffer, because we only call re_match_2
>> +     once.  */
>
> I'm not sure the reader will understand the significance of calling
> re_match_2 only once.  It would be good to clarify the comment.

Okay, I've added some more explanations to these comments.

>
> Otherwise, I think this should go in.

This is for emacs-25, right?  Technically, the bug seems to be present
in 24.5 and earlier, though I can only trigger it in 25.1.

Attachment: v3-0001-Fix-handling-of-allocation-in-regex-matching.patch
Description: patch v3


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