https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109810
--- Comment #2 from Gaius Mulley <gaius at gcc dot gnu.org> --- gm2 -g highice.mod highice.mod:6:6: warning: string constant is too large to be assigned to the array 6 | a := '12' | ^~ *** WARNING *** there are active plugins, do not report this as a bug unless you can reproduce it without enabling any plugins. Event | Plugins PLUGIN_FINISH | m2rte during GIMPLE pass: lower In function ‘_M2_highice_init’: cc1gm2: internal compiler error: in constant_byte_string, at expr.cc:12378 0x725205 constant_byte_string ../../gcc-13.1.0-RC-20230419/gcc/expr.cc:12378 0x9dde49 c_strlen(tree_node*, int, c_strlen_data*, unsigned int) ../../gcc-13.1.0-RC-20230419/gcc/builtins.cc:609 0xbc4f43 gimple_fold_builtin_memory_op ../../gcc-13.1.0-RC-20230419/gcc/gimple-fold.cc:976 0xbc6b8c gimple_fold_builtin ../../gcc-13.1.0-RC-20230419/gcc/gimple-fold.cc:5018 0xbc6b8c gimple_fold_call ../../gcc-13.1.0-RC-20230419/gcc/gimple-fold.cc:5576 0xbc8a3b fold_stmt_1 ../../gcc-13.1.0-RC-20230419/gcc/gimple-fold.cc:6328 0x1c11ae7 lower_stmt ../../gcc-13.1.0-RC-20230419/gcc/gimple-low.cc:793 0x1c12752 lower_sequence ../../gcc-13.1.0-RC-20230419/gcc/gimple-low.cc:229 0x1c12752 lower_gimple_bind ../../gcc-13.1.0-RC-20230419/gcc/gimple-low.cc:882 0x1c128fb lower_function_body ../../gcc-13.1.0-RC-20230419/gcc/gimple-low.cc:119 0x1c128fb execute ../../gcc-13.1.0-RC-20230419/gcc/gimple-low.cc:206 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