https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107299
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> --- I can build trunk without --enable-checking=release now, but I get some FAILs in the libstdc++ testsuite: during GIMPLE pass: threadfull /home/test/src/gcc/libstdc++-v3/testsuite/20_util/to_chars/float128_c++23.cc: In function 'void test(std::chars_format)': /home/test/src/gcc/libstdc++-v3/testsuite/20_util/to_chars/float128_c++23.cc:34: internal compiler error: in fold_stmt, at gimple-range-fold.cc:522 0x11ed1b03 fold_using_range::fold_stmt(vrange&, gimple*, fur_source&, tree_node*) /home/test/src/gcc/gcc/gimple-range-fold.cc:522 0x11ebd503 gimple_ranger::fold_range_internal(vrange&, gimple*, tree_node*) /home/test/src/gcc/gcc/gimple-range.cc:257 0x11ebd503 gimple_ranger::range_of_stmt(vrange&, gimple*, tree_node*) /home/test/src/gcc/gcc/gimple-range.cc:318 0x11ebb64f gimple_ranger::range_on_entry(vrange&, basic_block_def*, tree_node*) /home/test/src/gcc/gcc/gimple-range.cc:153 0x112368c3 path_range_query::range_on_path_entry(vrange&, tree_node*) /home/test/src/gcc/gcc/gimple-range-path.cc:160 0x11238063 path_range_query::internal_range_of_expr(vrange&, tree_node*, gimple*) /home/test/src/gcc/gcc/gimple-range-path.cc:176 0x112382b7 path_range_query::range_of_expr(vrange&, tree_node*, gimple*) /home/test/src/gcc/gcc/gimple-range-path.cc:202 0x11ecb723 fur_stmt::get_operand(vrange&, tree_node*) /home/test/src/gcc/gcc/gimple-range-fold.cc:157 0x11ecf48f fold_using_range::range_of_range_op(vrange&, gimple_range_op_handler&, fur_source&) /home/test/src/gcc/gcc/gimple-range-fold.cc:577 0x11ed1a03 fold_using_range::fold_stmt(vrange&, gimple*, fur_source&, tree_node*) /home/test/src/gcc/gcc/gimple-range-fold.cc:489 0x11237733 path_range_query::range_of_stmt(vrange&, gimple*, tree_node*) /home/test/src/gcc/gcc/gimple-range-path.cc:721 0x112f0db3 back_threader::find_taken_edge_cond(vec<basic_block_def*, va_heap, vl_ptr> const&, gcond*) /home/test/src/gcc/gcc/tree-ssa-threadbackward.cc:325 0x112f1087 back_threader::maybe_register_path(back_threader_profitability&) /home/test/src/gcc/gcc/tree-ssa-threadbackward.cc:248 0x112f1503 back_threader::find_paths_to_names(basic_block_def*, bitmap_head*, unsigned int, back_threader_profitability&) /home/test/src/gcc/gcc/tree-ssa-threadbackward.cc:371 0x112f1b27 back_threader::find_paths_to_names(basic_block_def*, bitmap_head*, unsigned int, back_threader_profitability&) /home/test/src/gcc/gcc/tree-ssa-threadbackward.cc:479 0x112f282b back_threader::maybe_thread_block(basic_block_def*) /home/test/src/gcc/gcc/tree-ssa-threadbackward.cc:551 0x112f2a73 back_threader::thread_blocks() /home/test/src/gcc/gcc/tree-ssa-threadbackward.cc:975 0x112f2b83 execute /home/test/src/gcc/gcc/tree-ssa-threadbackward.cc:1105 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. compiler exited with status 1 FAIL: 20_util/to_chars/float128_c++23.cc (test for excess errors)