GNU bug report logs - #14207
24.2; insert-file-contents clobbers match data

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Message #11 received at 14207 <at> debbugs.gnu.org (full text, mbox):

From: Aidan Gauland <aidalgol <at> no8wireless.co.nz>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 14207 <at> debbugs.gnu.org
Subject: Re: bug#14207: 24.2; insert-file-contents clobbers match data
Date: Tue, 16 Apr 2013 13:22:12 +1200

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Aidan Gauland <aidalgol <at> no8wireless.co.nz>
>> Date: Mon, 15 Apr 2013 12:56:26 +1200
>> 
>> If (and only if) the match data is non-nil when `insert-file-contents'
>> is called, it clobbers the match-data.
>
> And why is that a bug?
>
> From the ELisp manual (node "Match Data"):
>
>      Notice that all functions are allowed to overwrite the match data
>   unless they're explicitly documented not to do so.
>
> 'insert-file-contents' is not documented to preserve match data.

Oh, OK.  I thought it was the other way around: functions are supposed
to explicitly be documented as modifying the match data.

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