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Subject: [Bug c++/98356] New: [9/10/11 Regression] ICE in
 cp_parser_dot_deref_incomplete, at cp/parser.c:7899
Date: Thu, 17 Dec 2020 16:52:19 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98356

            Bug ID: 98356
           Summary: [9/10/11 Regression] ICE in
                    cp_parser_dot_deref_incomplete, at cp/parser.c:7899
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Changed between 20190210 (error) and 20190217 (ICE) :
(typo ; -> .)


$ cat z1.cc
template <template <typename> class T> struct S
{
  using A =3D T<int>;
  using A::foo;
  void foo ();
  void bar () {foo.}
};


$ g++-11-20201213 -c z1.cc
z1.cc: In member function 'void S<T>::bar()':
z1.cc:6:19: internal compiler error: Segmentation fault
    6 |   void bar () {foo.}
      |                   ^
0xc8f5ff crash_signal
        ../../gcc/toplev.c:327
0x7d8279 cxx_incomplete_type_diagnostic(unsigned int, tree_node const*,
tree_node const*, diagnostic_t)
        ../../gcc/cp/typeck2.c:373
0x72725e cp_parser_dot_deref_incomplete(tree_node**, cp_expr*, bool*)
        ../../gcc/cp/parser.c:7899
0x743cb5 cp_parser_postfix_dot_deref_expression
        ../../gcc/cp/parser.c:7973
0x7414d3 cp_parser_postfix_expression
        ../../gcc/cp/parser.c:7736
0x751a35 cp_parser_unary_expression
        ../../gcc/cp/parser.c:8808
0x72b84f cp_parser_cast_expression
        ../../gcc/cp/parser.c:9712
0x72c082 cp_parser_binary_expression
        ../../gcc/cp/parser.c:9814
0x72c7e0 cp_parser_assignment_expression
        ../../gcc/cp/parser.c:10118
0x72d65c cp_parser_expression
        ../../gcc/cp/parser.c:10288
0x7301e7 cp_parser_expression_statement
        ../../gcc/cp/parser.c:11955
0x73d44f cp_parser_statement
        ../../gcc/cp/parser.c:11751
0x73e344 cp_parser_statement_seq_opt
        ../../gcc/cp/parser.c:12102
0x73e3ff cp_parser_compound_statement
        ../../gcc/cp/parser.c:12052
0x758ff8 cp_parser_function_body
        ../../gcc/cp/parser.c:23975
0x758ff8 cp_parser_ctor_initializer_opt_and_function_body
        ../../gcc/cp/parser.c:24026
0x7594a6 cp_parser_function_definition_after_declarator
        ../../gcc/cp/parser.c:29916
0x759804 cp_parser_late_parsing_for_member
        ../../gcc/cp/parser.c:30827
0x73866a cp_parser_class_specifier_1
        ../../gcc/cp/parser.c:25088
0x739639 cp_parser_class_specifier
        ../../gcc/cp/parser.c:25112=