[Bug c++/32260] New: too many warning: dereferencing type-punned pointer will break strict-aliasing rules

[sylvain dot pion at sophia dot inria dot fr]

The following code, compiled with -O2 -Wall (g++ 4.3 as of 20070607),
produces the following unexpected/annoying warning:

test_typeinfo.cpp: In function 'int main()':
test_typeinfo.cpp:5: warning: dereferencing type-punned pointer will break
strict-aliasing rules
test_typeinfo.cpp:5: warning: unused variable 't'


~> cat test_typeinfo.cpp 
#include <typeinfo>

int main()
{
  const std::type_info & t = typeid(int);
}


Is this really meant to warn for such a code???


-- 
           Summary: too many warning: dereferencing type-punned pointer will
                    break strict-aliasing rules
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: sylvain dot pion at sophia dot inria dot fr
  GCC host triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32260