[Bug c++/11987] New: ICE/accepts-invalid with inherited nested type

["bangerth at dealii dot org" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11987

           Summary: ICE/accepts-invalid with inherited nested type
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code, accepts-invalid
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bangerth at dealii dot org
                CC: gcc-bugs at gcc dot gnu dot org

This piece of invalid code 
---------------------------------------- 
template <int dim> struct X { 
    struct I { I(); }; 
}; 
 
template <int dim> struct Y : X<dim> { 
    typedef typename X<dim>::I I; 
}; 
 
template <int dim> 
Y<dim>::I::I () {}  // note: I is nested type in X, not Y! 
 
template struct Y<1>; 
------------------------------------------------ 
ICEs everything up to and including 3.3: 
parameter-estimation/libparest> /ices/bangerth/bin/gcc-3.3/bin/g++ -c x.cc 
x.cc:10: internal compiler error: Segmentation fault 
Please submit a full bug report, 
with preprocessed source if appropriate. 
 
On the other hand, present mainline accepts it, which I think is spurious. So 
we traded an ICE for an accepts-invalid. 
 
W.