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Date: Mon, 08 May 2006 15:37:00 -0000
Subject: [Bug c++/27496]  New: ICE on broken templated friend
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The following invalid code snippet causes an ICE since GCC 3.0:

===================================
template<int> struct A
{
    template<void> friend class X;
};

A<0> a;
===================================

bug.cc:3: error: 'void' is not a valid type for a template constant parameter
bug.cc: In instantiation of 'A<0>':
bug.cc:6:   instantiated from here
bug.cc:3: error: 'void' is not a valid type for a template constant parameter
bug.cc:3: internal compiler error: tree check: expected tree that contains
'decl common' structure, have 'error_mark'  in tsubst_friend_class, at
cp/pt.c:5443
Please submit a full bug report, [etc.]

GCC 2.95.3 wrongly accepted the code.


-- 
           Summary: ICE on broken templated friend
           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=27496