[Bug c++/105228] New: [9/10/11/12 Regression] ICE tree check: expected tree that contains 'decl minimal' structure, have 'error_mark' in decl_anon_ns_mem_p, at cp/tree.cc:3826

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105228

            Bug ID: 105228
           Summary: [9/10/11/12 Regression] ICE tree check: expected tree
                    that contains 'decl minimal' structure, have
                    'error_mark' in decl_anon_ns_mem_p, at cp/tree.cc:3826
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Started with r7 :
(gcc configured with --enable-checking=yes)


$ cat z1.cc
template<template<void> class> struct A
{
  template<typename ... Args>
  static void foo() { foo(); }
};


$ g++-12-20220410 -c z1.cc
z1.cc:1:19: error: 'void' is not a valid type for a template non-type parameter
    1 | template<template<void> class> struct A
      |                   ^~~~
z1.cc: In substitution of 'template<template<<typeprefixerror><anonymous> >
class<template-parameter-1-1> > template<class ... Args> static void A<
<template-parameter-1-1> >::foo() [with Args = <missing>;
<template-parameter-1-1> = {}]':
z1.cc:4:26:   required from here
z1.cc:4:15: internal compiler error: tree check: expected tree that contains
'decl minimal' structure, have 'error_mark' in decl_anon_ns_mem_p, at
cp/tree.cc:3826
    4 |   static void foo() { foo(); }
      |               ^~~
0x6c9ab3 tree_contains_struct_check_failed(tree_node const*,
tree_node_structure_enum, char const*, int, char const*)
        ../../gcc/tree.cc:8953
0xa1b4ac contains_struct_check(tree_node const*, tree_node_structure_enum, char
const*, int, char const*)
        ../../gcc/tree.h:3827
0xa1b4ac decl_anon_ns_mem_p(tree_node const*)
        ../../gcc/cp/tree.cc:3826
0x8182b7 determine_visibility(tree_node*)
        ../../gcc/cp/decl2.cc:2867
0x9ae8bf tsubst_function_decl
        ../../gcc/cp/pt.cc:14305
0x9924f3 tsubst_decl
        ../../gcc/cp/pt.cc:14585
0x97ad67 tsubst(tree_node*, tree_node*, int, tree_node*)
        ../../gcc/cp/pt.cc:15565
0x9b4cb2 instantiate_template_1
        ../../gcc/cp/pt.cc:21625
0x9b4cb2 instantiate_template(tree_node*, tree_node*, int)
        ../../gcc/cp/pt.cc:21684
0x9bc656 fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, conversion**, bool,
bool)
        ../../gcc/cp/pt.cc:22150
0x72543b add_template_candidate_real
        ../../gcc/cp/call.cc:3544
0x7265a1 add_template_candidate
        ../../gcc/cp/call.cc:3636
0x7265a1 add_candidates
        ../../gcc/cp/call.cc:6176
0x736240 add_candidates
        ../../gcc/cp/call.cc:10994
0x736240 build_new_method_call(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, tree_node*, int, tree_node**, int)
        ../../gcc/cp/call.cc:11038
0x9e7dde finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
        ../../gcc/cp/semantics.cc:2791
0x9189d8 cp_parser_postfix_expression
        ../../gcc/cp/parser.cc:7880
0x92ffb1 cp_parser_unary_expression
        ../../gcc/cp/parser.cc:9029
0x8fd91f cp_parser_cast_expression
        ../../gcc/cp/parser.cc:9933
0x8fe1e1 cp_parser_binary_expression
        ../../gcc/cp/parser.cc:10035