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[Patch] Fix undefined behaviors in regex

From: Tim Shen <timshen91 at gmail dot com>
To: "libstdc++" <libstdc++ at gcc dot gnu dot org>, gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Wed, 16 Oct 2013 17:48:05 -0400
Subject: [Patch] Fix undefined behaviors in regex
Authentication-results: sourceware.org; auth=none

It's detected by `clang++ -g -std=c++11 -fsanitize=undefined` but not
detected by g++ with flags `g++ -g -std=c++11 -fsanitize=undefined
-lpthread`. Am I on the right way?

-m32 and -m64 tested :)

Thanks!


-- 
Tim Shen

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Follow-Ups:
- Re: [Patch] Fix undefined behaviors in regex
  - From: Paolo Carlini

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