Re: [Boost-bugs] [Boost C++ Libraries] #7814: Signal 6 coredump on lexical_cast with gcc option trapv

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #7814: Signal 6 coredump on lexical_cast with gcc option trapv
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-12-23 06:20:21

#7814: Signal 6 coredump on lexical_cast with gcc option trapv
------------------------------------------------+---------------------------
  Reporter:  Bernd Raum <braum@…>               |       Owner:  apolukhin                        
      Type:  Bugs                               |      Status:  assigned                         
 Milestone:  To Be Determined                   |   Component:  lexical_cast                     
   Version:  Boost 1.51.0                       |    Severity:  Problem                          
Resolution:                                     |    Keywords:  lexical_cast long trapv core dump
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Comment (by alexey kutumov <alexey.kutumov@…>):

 The problem is in numeric_limits::min, because negating of minimum value
 of signed type is not representable as signed type (but representable as
 unsigned), so this line is incorrect:
   utype const comp_val =
 static_cast<utype>(-(std::numeric_limits<Type>::min)());

 Patch 7814.patch solves this problem

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7814#comment:2>
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