Re: [Boost-bugs] [Boost C++ Libraries] #4636: Run-Time Check Failure #1 in feed_args.hpp using Visual Studio 2010

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4636: Run-Time Check Failure #1 in feed_args.hpp using Visual Studio 2010
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-10-11 18:56:14

#4636: Run-Time Check Failure #1 in feed_args.hpp using Visual Studio 2010
-------------------------------------+-------------------------------------
  Reporter:  Rüdiger Brünner         |      Owner:  James E. King, III
  <rbruenner@…>                      |
      Type:  Bugs                    |     Status:  new
 Milestone:  To Be Determined        |  Component:  format
   Version:  Boost 1.43.0            |   Severity:  Problem
Resolution:                          |   Keywords:  format Run-Time Check
                                     |  Failure VS2010
-------------------------------------+-------------------------------------
Changes (by James E. King, III):

 * owner:  Samuel Krempp => James E. King, III

Comment:

 I am looking into this.

 Event without /RTCsuc I am able to see the same thing using a numeric_cast
 as follows:

 {{{
             size_type res_size = (std::min)(
                 numeric_cast<size_type>(specs.truncate_) - !!prefix_space,
                 buf.pcount() );
 }}}

 Which results in the error:

 class boost::numeric::positive_overflow: bad numeric conversion: positive
 overflow

 Inspecting it in the debugger I see:

 {{{
 -               specs   {argN_=0 res_="" appendix_="00" ...}    const
 boost::io::detail::format_item<char,std::char_traits<char>,std::allocator<char>
 > &
                 argN_   0       int
 +               res_    ""
 std::basic_string<char,std::char_traits<char>,std::allocator<char> >
 +               appendix_       "00"
 std::basic_string<char,std::char_traits<char>,std::allocator<char> >
 +               fmtstate_       {width_=0 precision_=6 fill_=32 ' ' ...}
 boost::io::detail::stream_format_state<char,std::char_traits<char> >
                 truncate_       9223372036854775807     __int64
                 pad_scheme_     0       unsigned int
 }}}

 The offending test is in format_test1.cpp:

 {{{
   if(str( format("%%##%%##%%1 %1%00") % "Escaped OK" ) != "%##%##%1
 Escaped OK00")
 }}}

 At first glance I would say that the value of truncate_ is wrong here, and
 figuring that out will end up being the root cause.

-- 
Ticket URL: <https://svn.boost.org/trac10/boost/ticket/4636#comment:15>
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