https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101943
Bug ID: 101943
Summary: [12 Regression] ICE: Segmentation fault (in
cat_tag_for)
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-12.0.0-alpha20210815 snapshot (g:bbf19f9c20515da9fcd23f08c8139427374e8d77)
ICEs when compiling the following testcase, extracted from
test/CXX/class/class.compare/class.compare.default/p2.cpp from the clang 12.0.0
test suite, w/ -std=c++20:
struct A1 {
int x;
bool operator<=>(const A1&) const = default;
};
void f(A1 a) {
void(a <=> a);
}
% gcc-12.0.0 -std=c++20 -c xbo4cxcm.cpp
xbo4cxcm.cpp: In function 'void f(A1)':
xbo4cxcm.cpp:8:14: error: use of deleted function 'constexpr bool
A1::operator<=>(const A1&) const'
8 | void(a <=> a);
| ^
xbo4cxcm.cpp:4:8: note: 'constexpr bool A1::operator<=>(const A1&) const' is
implicitly deleted because the default definition would be ill-formed:
4 | bool operator<=>(const A1&) const = default;
| ^~~~~~~~
xbo4cxcm.cpp:2:7: error: 'strong_ordering' is not a member of 'std'
2 | int x;
| ^
xbo4cxcm.cpp:1:1: note: 'std::strong_ordering' is defined in header
'<compare>'; did you forget to '#include <compare>'?
+++ |+#include <compare>
1 | struct A1 {
xbo4cxcm.cpp:2:7: note: forming type of 'operator<=>'
2 | int x;
| ^
xbo4cxcm.cpp:4:8: internal compiler error: Segmentation fault
4 | bool operator<=>(const A1&) const = default;
| ^~~~~~~~
0x11210bf crash_signal
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/toplev.c:328
0xa03000 cat_tag_for
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/method.c:1032
0xa05302 genericize_spaceship(unsigned int, tree_node*, tree_node*, tree_node*)
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/method.c:1076
0xa05ecb build_comparison_op
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/method.c:1507
0xa0d92c maybe_explain_implicit_delete(tree_node*)
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/method.c:2749
0x9bffd5 mark_used(tree_node*, int)
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/decl2.c:5658
0x90717e build_over_call
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/call.c:9557
0x90d9d0 build_new_op_1
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/call.c:6547
0x90e18d build_new_op(op_location_t const&, tree_code, int, tree_node*,
tree_node*, tree_node*, tree_node**, int)
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/call.c:6806
0xb5516d build_x_binary_op(op_location_t const&, tree_code, tree_node*,
tree_code, tree_node*, tree_code, tree_node**, int)
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/typeck.c:4330
0xa6acb8 cp_parser_binary_expression
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/parser.c:10062
0xa6b45d cp_parser_assignment_expression
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/parser.c:10200
0xa6fcb6 cp_parser_parenthesized_expression_list
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/parser.c:8310
0xa70b12 cp_parser_functional_cast
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/parser.c:31561
0xa810b0 cp_parser_postfix_expression
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/parser.c:7492
0xa6ab02 cp_parser_binary_expression
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/parser.c:9896
0xa6b45d cp_parser_assignment_expression
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/parser.c:10200
0xa6ca82 cp_parser_expression
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/parser.c:10370
0xa70298 cp_parser_expression_statement
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/parser.c:12539
0xa7c2f3 cp_parser_statement
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210815/work/gcc-12-20210815/gcc/cp/parser.c:12335
