[Bug c++/50853] New: Internal Compiler Error returning a template type using brace initialization

["public at alisdairm dot net" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50853

             Bug #: 50853
           Summary: Internal Compiler Error returning a template type
                    using brace initialization
    Classification: Unclassified
           Product: gcc
           Version: 4.6.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: public@alisdairm.net


The following obscure code produces an ICE when the function template 'test' is
called:


template<int> struct MyType{};

template<int VAL>
auto test(MyType<VAL>) -> MyType<int{VAL}> { return {}; }

int main() {
   MyType<int{256}>{};
   test( MyType<256>{} );  // no error without this call
}

The ICE produced is:

internal compiler error: in tsubst_copy_and_build, at cp/pt.c:13389