Liviu Nicoara commented on STDCXX-1071:

The file punct-mt.cpp is a multi-threaded program that tests either the 
numpunct or the moneypunct facet accessor interface. If TEST_MONEYPUNCT is 
defined, the test tests moneypunct. The test fails with 4.2.x and presumably 
with all others. The moneypunct version does not fail in my local runs. I have 
used SUNPro 5.12 on Linux, but I noticed failures with gcc 4.7.1 as well. The 
test case is pointing at the numpunct facet caching code.
> numpunct facet cache initialization is not thread -safe
> -------------------------------------------------------
>                 Key: STDCXX-1071
>                 URL: https://issues.apache.org/jira/browse/STDCXX-1071
>             Project: C++ Standard Library
>          Issue Type: Bug
>          Components: 22. Localization, Thread Safety
>    Affects Versions: 4.2.1, 4.2.x, 4.3.x, 5.0.0
>         Environment: $ uname -a; CC -V
> Linux behemoth #3 SMP Sat Apr 9 22:49:32 CDT 2011 x86_64 AMD 
> Opteron(tm) Processor 6134 AuthenticAMD GNU/Linux
> CC: Sun C++ 5.12 Linux_i386 2011/11/16
>            Reporter: Liviu Nicoara
>            Priority: Critical
>              Labels: DCII, localization, numpunct, thread-safety
>             Fix For: 4.2.1, 4.2.x, 4.3.x, 5.0.0
>         Attachments: library-reduction.cpp, punct-mt.cpp
>   Original Estimate: 8h
>  Remaining Estimate: 8h
> The bug affects the initialization of the cached data in numpunct facet. The 
> failing test is 22.locale.numpunct.cpp in certain builds: Linux with SUNPro 
> 5.12, optimized, most likely to fail. It has been reported (see linked 
> incidents) to fail on SPARC as well. It manifests in variate ways: sometimes 
> as heap corruption, sometimes as access violations, etc. Test cases and 
> library reduction programs to follow. 

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