[Bug c++/59347] [4.9 Regression] ICE on invalid: tree check: expected class 'type', have 'exceptional' (error_mark) in tsubst_decl, at cp/pt.c:10798

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59347

Volker Reichelt <reichelt at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
      Known to work|                            |4.7.0, 4.8.0
           Keywords|                            |error-recovery,
                   |                            |ice-on-invalid-code
   Last reconfirmed|                            |2014-02-14
                 CC|                            |reichelt at gcc dot gnu.org
     Ever confirmed|0                           |1
            Summary|ICE on invalid: tree check: |[4.9 Regression] ICE on
                   |expected class 'type', have |invalid: tree check:
                   |'exceptional' (error_mark)  |expected class 'type', have
                   |in tsubst_decl, at          |'exceptional' (error_mark)
                   |cp/pt.c:10798               |in tsubst_decl, at
                   |                            |cp/pt.c:10798
   Target Milestone|---                         |4.9.0
      Known to fail|                            |4.9.0

--- Comment #1 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Confirmed.

Here's a simplified testcase that produces less error message before crashing:

===============================
template<int> struct A
{
  typedef int ::X;
};

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

The problem might be related to PR60200.