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regex no longer needs to depend on malloc-gnu

From: Nathan Kennedy
Subject: regex no longer needs to depend on malloc-gnu
Date: Thu, 17 Apr 2014 18:33:55 -0400
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0

The malloc-gnu (then malloc) dependency was added at 91f0c71300fb4f48cd39df121b8434f56012502c in response to a bug report with sed built against uClibc: http://lists.gnu.org/archive/html/bug-gnu-utils/2005-08/msg00112.html

The error was directly fixed at bbf0d723ed2335add96bcc0f842885d8a5d8b6da so I think this dependency can be removed.

Also, I filed bug 16851 against glibc/regex to get the bbf0d72... fix in glibc. For the sake of glibc/gnulib regex harmonization, I also observed that the MALLOC_0_IS_NONNULL macro attempting to check for malloc(0) failure is not needed. It should be enough to add "&& size != 0".


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