https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119437

            Bug ID: 119437
           Summary: ICE in build_base_path, at cp/class.cc:302
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rush102333 at gmail dot com
  Target Milestone: ---

Goes back to gcc-8: https://godbolt.org/z/Ysez18sqG

Test input:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  template<typename T>
  struct A {
    typedef int n;
    int f();
    struct B {};
    struct C : B {
      int g() {
        auto res=[&](){
        return f(); 
        }();
        return res;
    }
};
};

  template<> struct A<int>::B : A<int> {};
  A<int>::C::n n = A<int>::C().g();

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Stack Dump:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

<source>: In instantiation of 'int A<T>::C::g() [with T = int]':
<source>:17:33:   required from here
   17 |   A<int>::C::n n = A<int>::C().g();
      |                    ~~~~~~~~~~~~~^~
<source>:9:17: internal compiler error: in build_base_path, at cp/class.cc:302
    9 |         return f();
      |                ~^~
0x291f785 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
        ???:0
0x2936756 internal_error(char const*, ...)
        ???:0
0xacfde6 fancy_abort(char const*, int, char const*)
        ???:0
0xaf0a63 build_new_method_call(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, tree_node*, int, tree_node**, int)
        ???:0
0xd72f15 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
        ???:0
0xd44f85 tsubst_lambda_expr(tree_node*, tree_node*, int, tree_node*)
        ???:0
0xd1cb4d instantiate_decl(tree_node*, bool, bool)
        ???:0
0xd56cfb instantiate_pending_templates(int)
        ???:0
0xbdd170 c_parse_final_cleanups()
        ???:0
0xe54628 c_common_parse_file()
        ???: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.

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