https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103328
Bug ID: 103328 Summary: IC in remap_gimple_stmt, at tree-inline.c:1921 Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: a...@cloudius-systems.com Target Milestone: --- Created attachment 51836 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51836&action=edit reduced reproducer. Thanks cvise. The attached test case, compiled with g++ -O2 --std=gnu++20 -c -o out.o raft-server.i produces during GIMPLE pass: einline raft-server.i: In static member function ‘static seastar::futurize<T>::type seastar::futurize<T>::invoke(Func&&, FuncArgs&& ...) [with Func = const std::server_impl::send_message<std::variant<{anonymous}::append_request> >({anonymous}::server_id, std::variant<{anonymous}::append_request>)::<lambda(auto:1)>::<lambda()>&; FuncArgs = {}; T = const std::server_impl::send_message<std::variant<{anonymous}::append_request> >({anonymous}::server_id, std::variant<{anonymous}::append_request>)::<lambda(auto:1)>::<lambda()>&]’: raft-server.i:405:7: internal compiler error: in remap_gimple_stmt, at tree-inline.c:1921 405 | func(); | ~~~~^~ 0xd11c4f remap_gimple_stmt ../../gcc/gcc/tree-inline.c:1921 0xd14357 copy_bb ../../gcc/gcc/tree-inline.c:2022 0xd15744 copy_cfg_body ../../gcc/gcc/tree-inline.c:3054 0xd15744 copy_body ../../gcc/gcc/tree-inline.c:3309 0xd189af expand_call_inline ../../gcc/gcc/tree-inline.c:5129 0xd19f59 gimple_expand_calls_inline ../../gcc/gcc/tree-inline.c:5319 0xd19f59 optimize_inline_calls(tree_node*) ../../gcc/gcc/tree-inline.c:5492 0x15ee69e early_inliner(function*) ../../gcc/gcc/ipa-inline.c:3007 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. The test case is invalid code now, but pre-reduction was valid (and accepted by clang) and produced the same error. Tested with current gcc releases/gcc-11 branch HEAD (f62039efd679ffa8719732c71535457eb3ec61e0) + one patch backported (daa9c6b015a33fa98af0ee7cd6919120248ab5f9).