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Subject: [Bug c++/48856] New: Crash when compiling certain source code with C++0x
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48856

           Summary: Crash when compiling certain source code with C++0x
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: critical
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: thiago@kde.org


GCC crashes when compiling the attached source file in C++0x mode.

Steps to Reproduce:
1. Compile the attached preprocessed source file (Copyright Nokia, LGPL 2.1)
with C++0x support. That is, run:
   g++ -std=c++0x qxmlschema.ii

This results in the following message:
====
In file included from
/home/tmacieir/src/troll/qt-main/src/xmlpatterns/parser/qmaintainingreader_p.h:226:0,
                 from
/home/tmacieir/src/troll/qt-main/src/xmlpatterns/schema/qxsdschemaparsercontext_p.h:55,
                 from
/home/tmacieir/src/troll/qt-main/src/xmlpatterns/schema/qxsdschemaparser_p.h:67,
                 from
/home/tmacieir/src/troll/qt-main/src/xmlpatterns/api/qxmlschema_p.h:62,
                 from
/home/tmacieir/src/troll/qt-main/src/xmlpatterns/api/qxmlschema.cpp:43:
/home/tmacieir/src/troll/qt-main/src/xmlpatterns/parser/qmaintainingreader.cpp:
In member function 'QXmlStreamReader::TokenType
QPatternist::MaintainingReader<TokenLookupClass, LookupKey>::readNext()':
/home/tmacieir/src/troll/qt-main/src/xmlpatterns/parser/qmaintainingreader.cpp:86:57:
internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://qa.mandriva.com/> for instructions.
====

I have looked at Mandriva patches to GCC 4.6 and they do not seem to be related
at all (nothing related to the C++ engine at all), so I believe this is a GCC
issue.

The compiler also crashes if I preprocess the sources without -std=c++0x but
compile with it. The crash happens with the exact same messages.

This crash was not present on GCC 4.5.3.