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bug#11982: 24.1.50; (Contains ERT Test) show-paren-mode doesn't work in

From: Noam Postavsky
Subject: bug#11982: 24.1.50; (Contains ERT Test) show-paren-mode doesn't work in C comments if there's a quote between the parenthesis (affects c-mode and modes derived from it)
Date: Thu, 22 Aug 2019 11:48:48 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1.92 (windows-nt)

fixed 11982 27.1
notfixed 11982 26.1

Vincent Lefevre <address@hidden> writes:

> On 2019-08-22 11:05:04 -0400, Noam Postavsky wrote:
>> I can reproduce up to 25.3, but it seems to be fixed in 26.1.
> No, not fixed in 26.1, where this depends on some context.
> This is rather random, but here's a way to reproduce the
> bug in Debian:
> 1. emacs-gtk -Q foo.c
>    (where foo.c does not exist)
> 2. Paste "// Comments are good (aren't they?)"
> 3. Type C-M-p
> I get an error:
> forward-list: Scan error: "Unbalanced parentheses", 35, 1
> This problem does not occur without the apostrophe.

Oh, interesting, if I delete and re-insert the apostrophe, it stops
happening, i.e., there is some hidden state which affects things as

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