Re: [Boost-bugs] [Boost C++ Libraries] #11633: chrono IO may throw bad_cast

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #11633: chrono IO may throw bad_cast
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-09-10 05:41:22

#11633: chrono IO may throw bad_cast
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  Reporter:  Sébastien Barthélémy <barthelemy@…>  |      Owner:
      Type:  Bugs                                 |     Status:  new
 Milestone:  To Be Determined                     |  Component:  None
   Version:  Boost 1.58.0                         |   Severity:  Problem
Resolution:                                       |   Keywords:
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Comment (by viboes):

 For what I understand std::ios_base::imbue is not thread-safe.

 Version 1 is bugged as it does an imbue if the facet is not present,
 raising possible undefined behavior.

 Version 2 duration operator<< doesn't imbues the facet by itself. If not
 present, it uses duration_put.

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/11633#comment:3>
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