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bug#15344: 24.3; Crash when yanking in c-mode

From: Daniel Colascione
Subject: bug#15344: 24.3; Crash when yanking in c-mode
Date: Mon, 13 Jan 2014 05:59:33 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0

On 01/13/2014 05:39 AM, Thien-Thi Nguyen wrote:
Here is a script to make debugging easier:

Thanks. Does this patch have any unwanted side effects? It seems perfectly reasonable to me that we could reach the end of the interval tree without finding anything to modify or going past our bound.

=== modified file 'src/textprop.c'
--- src/textprop.c      2014-01-01 07:43:34 +0000
+++ src/textprop.c      2014-01-13 13:56:18 +0000
@@ -1741,6 +1741,8 @@
       len -= LENGTH (i);
       i = next_interval (i);
+      if (!i)
+        return Qnil;

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