Re: [Boost-bugs] [Boost C++ Libraries] #4671: std::bad_cast crash seems to be linked to boost_regex

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4671: std::bad_cast crash seems to be linked to boost_regex
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-11-16 09:09:41

#4671: std::bad_cast crash seems to be linked to boost_regex
------------------------------------------+---------------------------------
  Reporter:  Spinach <spinachio@…>        |       Owner:  johnmaddock
      Type:  Bugs                         |      Status:  new        
 Milestone:  To Be Determined             |   Component:  regex      
   Version:  Boost 1.44.0                 |    Severity:  Problem    
Resolution:                               |    Keywords:             
------------------------------------------+---------------------------------

Comment (by anonymous):

 This is a problem with the locale you are using - for whatever reason it
 doesn't contain a std::collate<char> facet - as it's required to do so by
 the standard.

 You could try and reproduce with:

 {{{
 std::locale l;
 std::use_facet<std::collate<char> >(l);
 }}}

 and see if that also throws.

 If it does, I'm not sure what the cause/solution is - it certainly should
 be reported to the libstdc++ developers if it's reproducable.  I'm also
 not sure why we don't see this problem on any of our MacOS test machines.
 As a workaround you could try defining BOOST_REGEX_USE_C_LOCALE in
 boost/regex/user.hpp so the library doesn't use the C++ locale at all (and
 rebuild obviously).

 One final check, I note that you're building the library with
 _GLIBCXX_DEBUG defined, I assume that your app is also built with that
 defined?  If not it will crash for sure as in general you can't mix object
 files with and without that define.

 HTH, John.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4671#comment:2>
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