[Bug c++/27427] New: [4.0/4.1/4.2 regression] ICE with invalid template parameter

[reichelt at gcc dot gnu dot org]

The following invalid code snippet crashes the C++ frontend sionce GCC 3.4.0:

==================================
struct A;

template<A&> void foo();

A a;

void bar()
{
  foo<a>();
}
==================================

bug.cc:5: error: aggregate 'A a' has incomplete type and cannot be defined
bug.cc: In function 'void bar()':
bug.cc:9: internal compiler error: tree check: expected class 'type', have
'exceptional' (error_mark) in convert_nontype_argument, at cp/pt.c:3583
Please submit a full bug report, [etc.]


-- 
           Summary: [4.0/4.1/4.2 regression] ICE with invalid template
                    parameter
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code, error-recovery, monitored
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27427