[Bug c++/110552] ICE on valid code in maybe_instantiate_noexcept

["pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110552

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 55470
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55470&action=edit
reduced but invalid code

This is the reduced testcase I got but it became invalid code; maybe the
original is invalid too. But clang's error message is:
<source>:31:25: error: member reference base type '__tag_t' (aka 'void') is not
a structure or union
   31 |       noexcept(__tag_t().get_env(__self))) {}
      |                ~~~~~~~~~^~~~~~~~
<source>:30:15: note: in instantiation of exception specification for
'tag_invoke<stdexec::__env::get_env_t, stdexec::__basic_sender<stdexec::(lambda
at <source>:33:25)>>' requested here
   30 |   friend auto tag_invoke(_Tag, const _Self &__self) noexcept(
      |               ^
<source>:6:14: note: in instantiation of function template specialization
'stdexec::tag_invoke<stdexec::__env::get_env_t,
stdexec::__basic_sender<stdexec::(lambda at <source>:33:25)>>' requested here
    6 |     decltype(tag_invoke(__declval<_Tag>(), __declval<_Args>()...));
      |              ^
<source>:13:10: note: in instantiation of template type alias
'tag_invoke_result_t' requested here
   13 |       -> tag_invoke_result_t<get_env_t, const _EnvProvider &> {}
      |          ^
<source>:19:36: note: while substituting deduced template arguments into
function template 'operator()' [with _EnvProvider =
stdexec::__basic_sender<stdexec::(lambda at <source>:33:25)>]
   19 |                                  { get_env(__ep) };
      |                                    ^
<source>:19:36: note: in instantiation of requirement here
   19 |                                  { get_env(__ep) };
      |                                    ^~~~~~~~~~~~~
<source>:18:32: note: while substituting template arguments into constraint
expression here
   18 | concept environment_provider = requires(_EnvProvider &__ep) {
      |                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   19 |                                  { get_env(__ep) };
      |                                  ~~~~~~~~~~~~~~~~~~
   20 |                                };
      |                                ~
<source>:35:15: note: while checking the satisfaction of concept
'environment_provider<stdexec::__basic_sender<stdexec::(lambda at
<source>:33:25)>>' requested here
   35 | static_assert(stdexec::environment_provider<S>);
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~