[Bug c++/81016] [7/8 Regression] ICE: segfault with template struct specialisation

["trippels at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81016

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
      Known to work|                            |6.3.0
           Keywords|                            |ice-on-invalid-code
   Last reconfirmed|                            |2017-06-08
                 CC|                            |trippels at gcc dot gnu.org
     Ever confirmed|0                           |1
            Summary|7.1.0 ICE: segfault with    |[7/8 Regression] ICE:
                   |template struct             |segfault with template
                   |specialisation              |struct specialisation
      Known to fail|                            |7.1.0, 8.0

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
It was rightfully rejected with gcc-6.

foo.ii:2:30: internal compiler error: Segmentation fault
 template <typename c> struct b<bool, c::d>;
                              ^~~~~~~~~~~~~
0xd74307 crash_signal
        /home/markus/gcc/gcc/toplev.c:338
0x7f1551fda4cf ???
       
/home/markus/glibc/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x78a2af unify
        /home/markus/gcc/gcc/cp/pt.c:20348
0x78ce39 unify
        /home/markus/gcc/gcc/cp/pt.c:20629
0x78b0a9 unify
        /home/markus/gcc/gcc/cp/pt.c:20820
0x78ea5e get_partial_spec_bindings
        /home/markus/gcc/gcc/cp/pt.c:21626
0x7a57d0 process_partial_specialization
        /home/markus/gcc/gcc/cp/pt.c:4706
0x7a6c27 push_template_decl_real(tree_node*, bool)
        /home/markus/gcc/gcc/cp/pt.c:5431
0x7a9ed7 push_template_decl_real(tree_node*, bool)
        /home/markus/gcc/gcc/cp/pt.c:5261
0x7a9ed7 push_template_decl(tree_node*)
        /home/markus/gcc/gcc/cp/pt.c:5672
0x7a9ed7 maybe_process_partial_specialization(tree_node*)
        /home/markus/gcc/gcc/cp/pt.c:973
0x67e914 shadow_tag(cp_decl_specifier_seq*)
        /home/markus/gcc/gcc/cp/decl.c:4827
0x71f9fa cp_parser_single_declaration
        /home/markus/gcc/gcc/cp/parser.c:26689
0x742a72 cp_parser_template_declaration_after_parameters
        /home/markus/gcc/gcc/cp/parser.c:26352
0x7426f5 cp_parser_explicit_template_declaration
        /home/markus/gcc/gcc/cp/parser.c:26587
0x7426f5 cp_parser_template_declaration_after_export
        /home/markus/gcc/gcc/cp/parser.c:26606
0x74abc9 cp_parser_declaration
        /home/markus/gcc/gcc/cp/parser.c:12472
0x74c734 cp_parser_declaration_seq_opt
        /home/markus/gcc/gcc/cp/parser.c:12399
0x74ca51 cp_parser_translation_unit
        /home/markus/gcc/gcc/cp/parser.c:4364
0x74ca51 c_parse_file()
        /home/markus/gcc/gcc/cp/parser.c:38475