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bug#33114: 25.2; Emacs hangs on closing a perenthesis in a regexp in cpe


From: Alan Mackenzie
Subject: bug#33114: 25.2; Emacs hangs on closing a perenthesis in a regexp in cperl mode
Date: 23 Oct 2018 14:46:24 -0000
User-agent: tin/2.4.2-20171224 ("Lochhead") (UNIX) (FreeBSD/11.2-RELEASE-p4 (amd64))

In article <address@hidden> you wrote:

> Consider the following file:

> # -*- mode: cperl -*-
> s/./(/e;

> 1. Open it with "emacs -Q".
> 2. Put the cursor just after the opening parenthesis.
> 3. Type ')' (closing parenthesis).

> This makes Emacs hang. A C-g alone has no effect. Several C-g in a row
> may give the control back to the user.

I tried this in Emacs 25.2 -Q under Gentoo.  I haven't yet been able to
reproduce the error.  Instead, on typing the ), I get the error message:

    End of `s/ ... // ... /' string/RE not found: (scan-error Unbalanced 
parentheses 29 32)

.  Maybe something in your Emacs build configuration is clashing with
something in cperl mode.

> Tested under Debian/unstable.

> In GNU Emacs 25.2.2 (x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
>  of 2018-07-11, modified by Debian built on x86-ubc-01
> Windowing system distributor 'The X.Org Foundation', version 11.0.12001000
> System Description:     Debian GNU/Linux stable-updates (sid)

-- 
Alan Mackenzie (Nuremberg, Germany).






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