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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/67544] New: ICE: SIGSEGV in tree_check3 (tree.h:2896) with -fconcepts
Date: Thu, 10 Sep 2015 19:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67544

            Bug ID: 67544
           Summary: ICE: SIGSEGV in tree_check3 (tree.h:2896) with
                    -fconcepts
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---

Created attachment 36322
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36322&action=edit
reduced testcase

Compiler output:
$ gcc -fconcepts testcase.C                                
testcase.C:8:45: internal compiler error: Segmentation fault
   template<typename T> friend struct A<T>::B;
                                             ^
0xd160cf crash_signal
        /mnt/svn/gcc-trunk/gcc/toplev.c:352
0x762540 tree_check3(tree_node*, char const*, int, char const*, tree_code,
tree_code, tree_code)
        /mnt/svn/gcc-trunk/gcc/tree.h:2896
0x762540 lookup_member(tree_node*, tree_node*, int, bool, int)
        /mnt/svn/gcc-trunk/gcc/cp/search.c:1281
0x74718b make_friend_class(tree_node*, tree_node*, bool)
        /mnt/svn/gcc-trunk/gcc/cp/friend.c:321
0x70faa9 cp_parser_template_declaration_after_parameters
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:24506
0x710384 cp_parser_explicit_template_declaration
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:24722
0x710384 cp_parser_template_declaration_after_export
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:24740
0x71095d cp_parser_member_declaration
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:21314
0x6ed064 cp_parser_member_specification_opt
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:21241
0x6ed064 cp_parser_class_specifier_1
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:20433
0x6ed064 cp_parser_class_specifier
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:20669
0x6ed064 cp_parser_type_specifier
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:15076
0x6fcd8b cp_parser_decl_specifier_seq
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:12042
0x7115f0 cp_parser_simple_declaration
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:11608
0x70afb4 cp_parser_block_declaration
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:11555
0x717147 cp_parser_declaration
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:11452
0x7158ea cp_parser_declaration_seq_opt
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:11334
0x715c05 cp_parser_translation_unit
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:4154
0x715c05 c_parse_file()
        /mnt/svn/gcc-trunk/gcc/cp/parser.c:34271
0x861852 c_common_parse_file()
        /mnt/svn/gcc-trunk/gcc/c-family/c-opts.c:1058
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r227604 - ICE