https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96360
Bug ID: 96360 Summary: ICE in tree check: expected integer_cst, have truth_orif_expr in get_len, at tree.h:5954 Product: gcc Version: 11.0 Status: UNCONFIRMED Keywords: ice-on-invalid-code Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: haoxintu at gmail dot com Target Milestone: --- Hi, all. This invalid code makes GCC ICE and without any error diagnostic messages. Input: //small.cc short a = 0; long const b = 0; enum class c {e}; template <typename = enum class c { d = b || a}> class A{}; template <> enum class c {}; Command: g++ small.cc Ouput: small.cc:6:27: internal compiler error: tree check: expected integer_cst, have truth_orif_expr in get_len, at tree.h:5954 6 | template <> enum class c {}; | ^ 0x7ebb15 tree_check_failed(tree_node const*, char const*, int, char const*, ...) ../../gcc/tree.c:9687 0x8aeb5a tree_check(tree_node const*, char const*, int, char const*, tree_code) ../../gcc/tree.h:3559 0x8aeb5a wi::extended_tree<192>::get_len() const ../../gcc/tree.h:5954 0x8aeb5a wi::int_traits<generic_wide_int<wi::extended_tree<192> > >::decompose(long*, unsigned int, generic_wide_int<wi::extended_tree<192> > const&) ../../gcc/wide-int.h:985 0x8aeb5a wide_int_ref_storage<true, false>::wide_int_ref_storage<generic_wide_int<wi::extended_tree<192> > >(generic_wide_int<wi::extended_tree<192> > const&, unsigned int) ../../gcc/wide-int.h:1034 0x8aeb5a generic_wide_int<wide_int_ref_storage<true, false> >::generic_wide_int<generic_wide_int<wi::extended_tree<192> > >(generic_wide_int<wi::extended_tree<192> > const&, unsigned int) ../../gcc/wide-int.h:790 0x8aeb5a bool wi::lts_p<generic_wide_int<wi::extended_tree<192> >, generic_wide_int<wi::extended_tree<192> > >(generic_wide_int<wi::extended_tree<192> > const&, generic_wide_int<wi::extended_tree<192> > const&) ../../gcc/wide-int.h:1901 0x93b738 wi::binary_traits<generic_wide_int<wi::extended_tree<192> >, generic_wide_int<wi::extended_tree<192> >, wi::int_traits<generic_wide_int<wi::extended_tree<192> > >::precision_type, wi::int_traits<generic_wide_int<wi::extended_tree<192> > >::precision_type>::signed_predicate_result operator< <generic_wide_int<wi::extended_tree<192> >, generic_wide_int<wi::extended_tree<192> > >(generic_wide_int<wi::extended_tree<192> > const&, generic_wide_int<wi::extended_tree<192> > const&) ../../gcc/wide-int.h:3248 0x93b738 tree_int_cst_lt(tree_node const*, tree_node const*) ../../gcc/tree.h:6110 0x93b738 finish_enum_value_list(tree_node*) ../../gcc/cp/decl.c:15574 0x9cc32b cp_parser_enum_specifier ../../gcc/cp/parser.c:19471 0x9cc32b cp_parser_type_specifier ../../gcc/cp/parser.c:17757 0x9ccc0e cp_parser_decl_specifier_seq ../../gcc/cp/parser.c:14424 0x9f46d5 cp_parser_single_declaration ../../gcc/cp/parser.c:29487 0x9f59f0 cp_parser_explicit_specialization ../../gcc/cp/parser.c:17677 0x9f8e5d cp_parser_declaration ../../gcc/cp/parser.c:13444 0x9f941b cp_parser_translation_unit ../../gcc/cp/parser.c:4781 0x9f941b c_parse_file() ../../gcc/cp/parser.c:44069 0xb13e2d c_common_parse_file() ../../gcc/c-family/c-opts.c:1188 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. Every version of GCC-6.1 onwards behaves the same. (I didn't test older versions)