[Bug c++/115331] New: [15 regression] ICE-on-invalid passing a typoed lambda to a list-initializer

["blubban at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115331

            Bug ID: 115331
           Summary: [15 regression] ICE-on-invalid passing a typoed lambda
                    to a list-initializer
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: blubban at gmail dot com
  Target Milestone: ---

struct has_ctor
{
    has_ctor(auto arg) {}
};

void aaa()
{
    has_ctor{[]<(){}}; // typo intentional
}


-std=c++20


<source>: In function 'void aaa()':
<source>:8:17: error: expected identifier before '(' token
    8 |     has_ctor{[]<(){}};
      |                 ^
<source>:8:19: error: expected '>' before '{' token
    8 |     has_ctor{[]<(){}};
      |                   ^
<source>: In instantiation of 'has_ctor::has_ctor(auto:1) [with auto:1 =
aaa()::<lambda()>]':
<source>:3:5:   required from here
    3 |     has_ctor(auto arg) {}
      |     ^~~~~~~~
<source>:3:5: internal compiler error: tree check: expected tree that contains
'decl common' structure, have 'error_mark' in decl_template_parm_check, at
cp/cp-tree.h:5138
0x269996c internal_error(char const*, ...)
        ???:0
0x96eb0f tree_contains_struct_check_failed(tree_node const*,
tree_node_structure_enum, char const*, int, char const*)
        ???:0
0xba20c6 mangle_decl(tree_node*)
        ???:0
0x16c5fc5 decl_assembler_name(tree_node*)
        ???:0
0x16eea01 assign_assembler_name_if_needed(tree_node*)
        ???:0
0xe8c11d cgraph_node::analyze()
        ???:0
0xe8f6d1 symbol_table::finalize_compilation_unit()
        ???:0
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1


Online reproducer: https://godbolt.org/z/K1hjEsaf5


The ICE does not reproduce on 14.1, it's trunk only (tested on
Compiler-Explorer-Build-gcc-cbf2ed4b309d54039d74be5d730299012e7681b3-binutils-2.42,
15.0.0 20240603).