[Boost-bugs] [Boost C++ Libraries] #10194: basic_xml_grammar<wchar_t> parses class_id failed

Subject: [Boost-bugs] [Boost C++ Libraries] #10194: basic_xml_grammar<wchar_t> parses class_id failed
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-07-14 16:02:00

#10194: basic_xml_grammar<wchar_t> parses class_id failed
 Reporter: Andrew Xu <xulei.js@…> | Type: Bugs
   Status: new | Milestone: To Be Determined
Component: None | Version: Boost 1.54.0
 Severity: Problem | Keywords:
 I found this issue when I used xml wserialization to save config in
 polymorphic case. After debugging, I found basic_xml_grammar<wchar_t>
 failed to parse "class_id" under some conditions. There are some info for
 this issue:
 1. Compile with NDEBUG, without NDEBUG no this issue.
 2. basic_xml_grammar<char> works fine.
 3. Compile with GCC (when compile with VS2010, no this issue)
 Detail of GCC:
 gcc -v
 Using built-in specs.
 Target: x86_64-redhat-linux
 Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
 --infodir=/usr/share/info --with-
 bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-
 shared --enable-threads=posix --enable-checking=release --with-system-zlib
 --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-
 object --enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-
 java-awt=gtk --disable-dssi --with-java-
 home=/usr/lib/jvm/java-1.5.0-gcj- --enable-libgcj-multifile
 --enable-java-maintainer-mode --with-ecj-jar=/usr/share/java/eclipse-
 ecj.jar --disable-libjava-multilib --with-ppl --with-cloog --with-
 tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
 Thread model: posix
 gcc version 4.4.7 20120313 (Red Hat 4.4.7-3) (GCC)

 I trimmed the test code:

 #include <boost/archive/impl/basic_xml_grammar.hpp>
 #include <fstream>
 #include <iostream>

 using namespace boost::archive;

 int main()
     std::wifstream ifs("./dashboard.xml");

     if (ifs) {
         basic_xml_grammar<wchar_t> xmlGrammer;

         std::wcout << "rv.class_id=" << xmlGrammer.rv.class_id <<
     else {
         std::cout << "File doesn't exist." << std::endl;

     return 0;

 and the dashboard.xml is very simple with only one line:
 <item class_id="4" class_name="ComponentDataChart" tracking_level="1"
 version="4" object_id="_3">

Ticket URL: <https://svn.boost.org/trac/boost/ticket/10194>
Boost C++ Libraries <http://www.boost.org/>
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