[Bug c++/107484] New: [13 Regression] ICE: Segmentation fault (in decls_match)

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107484

            Bug ID: 107484
           Summary: [13 Regression] ICE: Segmentation fault (in
                    decls_match)
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---

g++ 13.0.0 20221030 snapshot (g:f36bba013361d8d4f9c7237c3307630de0cc0416) ICEs
when compiling the following testcase, reduced from test/SemaCXX/friend.cpp
from the clang 14 test suite:

namespace qualified_friend_no_match {
  void f(int);
  template<typename T> void f(T*);
  struct X {
    friend void qualified_friend_no_match::f(double);
  };
}

% g++-13 -c ivdlqc5m.cpp
ivdlqc5m.cpp:5:52: internal compiler error: Segmentation fault
    5 |     friend void qualified_friend_no_match::f(double);
      |                                                    ^
0x11ef2cf crash_signal
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/toplev.cc:314
0xa1a521 tree_check(tree_node*, char const*, int, char const*, tree_code)
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/tree.h:3531
0xa1a521 decls_match(tree_node*, tree_node*, bool)
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/decl.cc:1010
0xa41b64 find_last_decl
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/decl2.cc:1627
0xa41b64 cplus_decl_attributes(tree_node**, tree_node*, int)
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/decl2.cc:1739
0xa29c39 grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/decl.cc:14216
0xa4799f grokfield(cp_declarator const*, cp_decl_specifier_seq*, tree_node*,
bool, tree_node*, tree_node*)
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/decl2.cc:990
0xb3c1ad cp_parser_member_declaration
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/parser.cc:27522
0xb07047 cp_parser_member_specification_opt
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/parser.cc:26932
0xb07047 cp_parser_class_specifier
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/parser.cc:26007
0xb07047 cp_parser_type_specifier
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/parser.cc:19383
0xb08fa1 cp_parser_decl_specifier_seq
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/parser.cc:15933
0xb0a1c7 cp_parser_simple_declaration
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/parser.cc:15157
0xb3dfa1 cp_parser_declaration
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/parser.cc:14970
0xb3d4b9 cp_parser_toplevel_declaration
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/parser.cc:14991
0xb3d4b9 cp_parser_declaration_seq_opt
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/parser.cc:14742
0xb3d914 cp_parser_namespace_body
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/parser.cc:21436
0xb3d914 cp_parser_namespace_definition
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/parser.cc:21414
0xb3e2f5 cp_parser_declaration
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/parser.cc:14950
0xb3eae9 cp_parser_toplevel_declaration
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221030/work/gcc-13-20221030/gcc/cp/parser.cc:14991