[Bug libstdc++/11638] New: [3.3.1 prerelease] std::vector assign problem with null pointer constant

["nick at ilm dot com" <gcc-bugzilla at gcc dot gnu dot org>]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11638

           Summary: [3.3.1 prerelease] std::vector assign problem with null
                    pointer constant
           Product: gcc
           Version: 3.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: nick at ilm dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i386-redhat-linux
  GCC host triplet: i386-redhat-linux
GCC target triplet: i386-redhat-linux

The following code fails to compile with the prerelease:

----
#include <vector>

class A;

void
f()
{
    std::vector<A *> v;
    v.assign(5,0);
}
---

> /dept/rnd/vendor/gcc-3.3.1-20030720/bin/g++ -c testassign.C -o /dev/null
/dept/rnd/vendor/gcc-3.3.1-20030720/include/c++/3.3.1/bits/stl_vector.h: In 
   member function `void std::vector<_Tp, _Alloc>::_M_assign_dispatch(_Integer, 
   _Integer, __true_type) [with _Integer = int, _Tp = A*, _Alloc = 
   std::allocator<A*>]':
/dept/rnd/vendor/gcc-3.3.1-20030720/include/c++/3.3.1/bits/stl_vector.h:342:  
instantiated from `void std::vector<_Tp, _Alloc>::assign(_InputIterator,
_InputIterator) [with _InputIterator = int, _Tp = A*, _Alloc = std::allocator<A*>]'
testassign.C:9:   instantiated from here
/dept/rnd/vendor/gcc-3.3.1-20030720/include/c++/3.3.1/bits/stl_vector.h:841:
error: invalid
   static_cast from type `int' to type `A*'


The following code:
----
class A;

void
f()
{
    A *a = static_cast<A *>(0);
}
----

compiles correctly, so it looks like information's getting lost somewhere
in the templating. static_casting from 1 correctly returns the same error
as above.

This works with 3.2.3 but not 3.3 or the 3.3.1 prerelease.

-nick