[Bug c++/84618] New: internal compiler error: in build_capture_proxy, at cp/lambda.c:460

[vegard.nossum at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84618

            Bug ID: 84618
           Summary: internal compiler error: in build_capture_proxy, at
                    cp/lambda.c:460
           Product: gcc
           Version: 8.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vegard.nossum at gmail dot com
  Target Milestone: ---

Input:

template<int>
void a() {
  struct {
    void b() const;
    void b() { [b] }
  };
};

Output:

$ xgcc -x c++ -S input.cc
input.cc: In lambda function:
input.cc:5:18: internal compiler error: in build_capture_proxy, at
cp/lambda.c:460
     void b() { [b] }
                  ^
0xd425db build_capture_proxy
        /home/vegard/git/gcc/gcc/cp/lambda.c:460
0xd55770 start_lambda_function(tree_node*, tree_node*)
        /home/vegard/git/gcc/gcc/cp/lambda.c:1377
0xfd1f1d cp_parser_lambda_body
        /home/vegard/git/gcc/gcc/cp/parser.c:10668
0xfd1f1d cp_parser_lambda_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:10182
0xf37404 cp_parser_primary_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:5257
0xf78edb cp_parser_postfix_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:7026
0xf2cc47 cp_parser_unary_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:8318
0xec1cba cp_parser_cast_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:9086
0xec42e6 cp_parser_binary_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:9187
0xec80ba cp_parser_assignment_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:9482
0xecc026 cp_parser_expression
        /home/vegard/git/gcc/gcc/cp/parser.c:9651
0xee05a6 cp_parser_expression_statement
        /home/vegard/git/gcc/gcc/cp/parser.c:11127
0xefbf30 cp_parser_statement
        /home/vegard/git/gcc/gcc/cp/parser.c:10931
0xf0043b cp_parser_statement_seq_opt
        /home/vegard/git/gcc/gcc/cp/parser.c:11270
0xf00eda cp_parser_compound_statement
        /home/vegard/git/gcc/gcc/cp/parser.c:11224
0xf953eb cp_parser_function_body
        /home/vegard/git/gcc/gcc/cp/parser.c:21767
0xf953eb cp_parser_ctor_initializer_opt_and_function_body
        /home/vegard/git/gcc/gcc/cp/parser.c:21802
0xf9e5f5 cp_parser_function_definition_after_declarator
        /home/vegard/git/gcc/gcc/cp/parser.c:26703
0xfa08bc cp_parser_late_parsing_for_member
        /home/vegard/git/gcc/gcc/cp/parser.c:27584
0xf19ac5 cp_parser_class_specifier_1
        /home/vegard/git/gcc/gcc/cp/parser.c:22731

xgcc --version
xgcc (GCC) 8.0.1 20180228 (experimental)

This looks potentially similar to bug #84160, but I'm running a more recent
version where that bug should be already fixed.