https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99811
Bug ID: 99811
Summary: ICE: tree check: accessed elt 2 of 'tree_vec' with 1
elts in tsubst_pack_expansion, at cp/pt.c:13002
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: hewillk at gmail dot com
Target Milestone: ---
https://godbolt.org/z/shj7Tr65M
related to PR 99809:
#include <concepts>
template <typename... Ts>
auto f(Ts...) {
return []<typename... Us>(std::same_as<Ts> auto...) {};
}
int main() {
f(0, 0.5)();
}
<source>:9:12: internal compiler error: tree check: accessed elt 2 of
'tree_vec' with 1 elts in tsubst_pack_expansion, at cp/pt.c:13002
9 | f(0, 0.5)();
| ~~~~~~~~~^~
0x1cfb7f9 internal_error(char const*, ...)
???:0
0x67bcb2 tree_vec_elt_check_failed(int, int, char const*, int, char const*)
???:0
0x93095c tsubst_pack_expansion(tree_node*, tree_node*, int, tree_node*)
???:0
0x73efca constraints_satisfied_p(tree_node*, tree_node*)
???:0
0x954963 fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, conversion**, bool,
bool)
???:0
0x6e225e build_op_call(tree_node*, vec<tree_node*, va_gc, vl_embed>**, int)
???:0
0x980ae5 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
???:0
0x8e12ad c_parse_file()
???:0
0xa600a2 c_common_parse_file()
???:0
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
