https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103868
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> --- Created attachment 52116 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52116&action=edit Partially reduced test-case The test-case fails with the following on master: $ ./xgcc -B. /tmp/x.ii -c -std=c++20 -w during RTL pass: expand /tmp/x.ii: In function ‘void malloy::test::client_ws_handler_coro(client_ws_handler_coro<false>(malloy::error_code, std::shared_ptr<malloy::websocket::connection<true> >)::_ZN6malloy4test22client_ws_handler_coroILb0EEEN5boost4asio9awaitableIvNS3_15any_io_executorEEENS2_6system10error_codeESt10shared_ptrINS_9websocket10connectionILb1EEEE.Frame*)’: /tmp/x.ii:1035:70: internal compiler error: in make_decl_rtl, at varasm.c:1446 1035 | auto size = co_await conn->read(*buffer, boost::asio::use_awaitable); | ^ 0x8f7d91 make_decl_rtl(tree_node*) /home/marxin/Programming/gcc/gcc/varasm.c:1446 0xe7ede7 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) /home/marxin/Programming/gcc/gcc/expr.c:10550 0xe87d77 expand_expr /home/marxin/Programming/gcc/gcc/expr.h:301 0xe87d77 expand_expr_addr_expr_1 /home/marxin/Programming/gcc/gcc/expr.c:8427 0xe7e2c4 expand_expr_addr_expr /home/marxin/Programming/gcc/gcc/expr.c:8548 0xe7e2c4 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) /home/marxin/Programming/gcc/gcc/expr.c:11764 0xe8aa46 store_expr(tree_node*, rtx_def*, int, bool, bool) /home/marxin/Programming/gcc/gcc/expr.c:6087 0xe8c25d expand_assignment(tree_node*, tree_node*, bool) /home/marxin/Programming/gcc/gcc/expr.c:5819 0xd4b07a expand_gimple_stmt_1 /home/marxin/Programming/gcc/gcc/cfgexpand.c:3930 0xd4b07a expand_gimple_stmt /home/marxin/Programming/gcc/gcc/cfgexpand.c:4028 0xd5155c expand_gimple_basic_block /home/marxin/Programming/gcc/gcc/cfgexpand.c:6069 0xd53727 execute /home/marxin/Programming/gcc/gcc/cfgexpand.c:6795 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. Note it uses coroutines and -fconcepts. $ (gdb) p debug_tree(decl) <var_decl 0x7ffff7434d80 _Coro_promise type <record_type 0x7ffff7462bd0 promise_type sizes-gimplified cxx-odr-p type_5 type_6 QI size <integer_cst 0x7ffff75f3048 constant 8> unit-size <integer_cst 0x7ffff75f3060 constant 1> align:8 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type 0x7ffff7462b28 fields <function_decl 0x7ffff7140000 __dt type <method_type 0x7ffff713b2a0> public abstract external autoinline decl_3 decl_8 QI /tmp/x.ii:982:7 align:16 warn_if_not_align:0 context <record_type 0x7ffff7462b28 awaitable_frame> full-name "constexpr boost::asio::detail::awaitable_frame<void, boost::asio::any_io_executor>::~awaitable_frame() noexcept (<uninstantiated>)" not-really-extern chain <function_decl 0x7ffff7140200 __dt_base >> context <namespace_decl 0x7ffff7338e40 detail> full-name "std::__n4861::coroutine_traits<boost::asio::awaitable<void>, boost::system::error_code, std::shared_ptr<malloy::websocket::connection<true> > >::promise_type" X() X(constX&) this=(X&) n_parents=1 use_template=1 interface-unknown pointer_to_this <pointer_type 0x7ffff7469498> chain <type_decl 0x7ffff7450d10 awaitable_frame>> addressable used read QI /tmp/x.ii:1035:70 size <integer_cst 0x7ffff75f3048 8> unit-size <integer_cst 0x7ffff75f3060 1> align:8 warn_if_not_align:0> $1 = void
