[Boost-bugs] [Boost C++ Libraries] #7704: lexical_cast to filesystem::path fails for string::length > 22

Subject: [Boost-bugs] [Boost C++ Libraries] #7704: lexical_cast to filesystem::path fails for string::length > 22
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-11-16 19:32:52

#7704: lexical_cast to filesystem::path fails for string::length > 22
----------------------------------------------------+-----------------------
 Reporter:  Braden McDaniel <braden@…>              |        Type:  Bugs            
   Status:  new                                     |   Milestone:  To Be Determined
Component:  None                                    |     Version:  Boost 1.52.0    
 Severity:  Problem                                 |    Keywords:                  
----------------------------------------------------+-----------------------
 When building with clang on Darwin using `-stdlib=libc++`, a
 `lexical_cast` to a `filesystem::path` will fail if the input string is
 longer than 22 elements.

 Consider this test program:

 {{{
 #!C++
 #include <boost/lexical_cast.hpp>
 #include <boost/filesystem/path.hpp>

 int main()
 {
   try {
     boost::filesystem::path p;
     std::string s1 = "aaaaaaaaaaaaaaaaaaaaaaa";
     p = boost::lexical_cast<boost::filesystem::path>(s1);
   } catch (std::exception & ex) {
     std::cerr << ex.what() << std::endl;
     return EXIT_FAILURE;
   }
 }
 }}}
 …compiled thusly:
 {{{
 clang++ -stdlib=libc++ -I /Users/bradenmcdaniel/Source/boost_1_52_0 -L
 /Users/bradenmcdaniel/Source/boost_1_52_0/stage/lib -lboost_filesystem
 -lboost_system -o lexical-cast-path lexical_cast_path.cpp
 }}}

 When run, it produces this output:
 {{{
 $ ./lexical-cast-path
 bad lexical cast: source type value could not be interpreted as target
 }}}

 If the length of `s1` is reduced by 1 (from 23 to 22), the test program
 will succeed.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7704>
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