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bug#3943: 23.0.96; CPerl-mode is too electric

From: Chong Yidong
Subject: bug#3943: 23.0.96; CPerl-mode is too electric
Date: Sun, 16 Aug 2009 19:24:23 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)

Ilya Zakharevich <address@hidden> writes:

>> Could you take a look at the following bug report?  Thanks.
>> http://emacsbugs.donarmstrong.com/cgi-bin/bugreport.cgi?bug=3943
> The home of CPerl is ilyaz.org/software/emacs
> Please report results with my version.  (The shipped-with-Emacs
> version is hopelessly buggy...)

The problem exists in upstream CPerl as well.  The bug arises from line
3763 (cperl-electric-paren):

  (if (eq last-command-char ?<)
        (and abbrev-mode ; later it is too late, may be after `for'
        (cperl-after-expr-p nil "{;(,:="))

Because one abbrev expansion already takes place when typing "while ",
this code leads to another, extra expansion.  Removing the
(and abbrev-mode...) expression fixes the problem.

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