https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95999
Bug ID: 95999
Summary: ICE in tree check: expected integer_cst, have var_decl
in get_len, at tree.h:5951
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Keywords: error-recovery, ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: haoxintu at gmail dot com
CC: webrown.cpp at gmail dot com
Target Milestone: ---
CC: webrown.cpp at gmail dot com
This code, bug.cc, reduced by C-Reduce, makes GCC-trunk ICE.
$cat bug.cc
int a;
enum struct b;
template <typename = enum struct b { c = a d }
template <> enum struct b { e };
$g++ bug.cc
bug.cc:3:42: error: the value of ‘a’ is not usable in a constant expression
3 | template <typename = enum struct b { c = a d }
| ^
bug.cc:1:5: note: ‘int a’ is not const
1 | int a;
| ^
bug.cc:3:44: error: expected ‘}’ before ‘d’
3 | template <typename = enum struct b { c = a d }
| ~ ^
bug.cc:3:44: error: expected ‘>’ before ‘d’
bug.cc:3:46: error: expected unqualified-id before ‘}’ token
3 | template <typename = enum struct b { c = a d }
| ^
bug.cc:3:46: error: expected declaration before ‘}’ token
bug.cc:4:29: internal compiler error: tree check: expected integer_cst, have
var_decl in get_len, at tree.h:5951
4 | template <> enum struct b { e };
| ^
0x7c2dcf tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../gcc/tree.c:9685
0x61582f tree_check(tree_node const*, char const*, int, char const*, tree_code)
../../gcc/tree.h:3557
0x61582f wi::extended_tree<192>::get_len() const
../../gcc/tree.h:5951
0x61582f 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
0x61582f 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
0x61582f 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
0x61582f wi::binary_traits<generic_wide_int<wi::extended_tree<192> >, int,
wi::int_traits<generic_wide_int<wi::extended_tree<192> > >::precision_type,
wi::int_traits<int>::precision_type>::result_type
wi::add<generic_wide_int<wi::extended_tree<192> >,
int>(generic_wide_int<wi::extended_tree<192> > const&, int const&, signop,
wi::overflow_type*)
../../gcc/wide-int.h:2467
0x61582f build_enumerator(tree_node*, tree_node*, tree_node*, tree_node*,
unsigned int)
../../gcc/cp/decl.c:15857
0x9a2447 cp_parser_enumerator_definition
../../gcc/cp/parser.c:19545
0x9a2447 cp_parser_enumerator_list
../../gcc/cp/parser.c:19474
0x9a2447 cp_parser_enum_specifier
../../gcc/cp/parser.c:19405
0x9a2447 cp_parser_type_specifier
../../gcc/cp/parser.c:17734
0x9a2a02 cp_parser_decl_specifier_seq
../../gcc/cp/parser.c:14410
0x9c8f35 cp_parser_single_declaration
../../gcc/cp/parser.c:29459
0x9ca0f0 cp_parser_explicit_specialization
../../gcc/cp/parser.c:17654
0x9ccac9 cp_parser_declaration
../../gcc/cp/parser.c:13430
0x9cd06a cp_parser_translation_unit
../../gcc/cp/parser.c:4761
0x9cd06a c_parse_file()
../../gcc/cp/parser.c:44043
0xae4dbb c_common_parse_file()
../../gcc/c-family/c-opts.c:1190
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.
$g++ --version
g++ (GCC) 11.0.0 20200626 (experimental)
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
