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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/103328] [11/12 Regression] ICE in remap_gimple_stmt, at
 tree-inline.c:1921 since r11-7419-g0f161cc8494cf728
Date: Fri, 19 Nov 2021 11:26:48 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103328

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is a bad bisection, just change it like:
--- pr103328.C~ 2021-11-19 06:20:59.000000000 -0500
+++ pr103328.C  2021-11-19 06:21:57.000000000 -0500
@@ -530,7 +530,7 @@ void server_impl::send_message(server_id
   visit(
       [this, id](auto m) {
         _append_request_status[id].f.then(
-            [this, cm(m), cid =3D id] noexcept -> future<> {
+            [this, cm(m), cid =3D id] () noexcept -> future<> {
               auto m(cm);
               auto id =3D cid;
               try {
and you'll see it started earlier.
I then bisect it to r11-4386-g9e2256dcd481ffe3a8c79b65eba19fbb14b7ff8d
but that just means we need to use a replacement for __is_nothrow_construct=
ible
to bisect it further.
I'm pretty sure the bug is in coroutines handling...=