https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99809
Bug ID: 99809
Summary: ICE: sorry, unimplemented: unexpected AST of kind
nontype_argument_pack
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/4dnnTTzMW
#include <concepts>
auto f(auto... args) {
return [](std::same_as<decltype(args)> auto) {};
}
int main() {
f(0)(0);
}
<source>:4:10: sorry, unimplemented: unexpected AST of kind
nontype_argument_pack
4 | return [](std::same_as<decltype(args)> auto) {};
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<source>:4:10: internal compiler error: in potential_constant_expression_1, at
cp/constexpr.c:8854
0x1cfb7f9 internal_error(char const*, ...)
???:0
0x6ba871 fancy_abort(char const*, int, char const*)
???:0
0x72ac1e is_nondependent_constant_expression(tree_node*)
???:0
0x91465c instantiate_non_dependent_expr_sfinae(tree_node*, int)
???:0
0x98afc1 finish_decltype_type(tree_node*, bool, int)
???:0
0x915dc3 tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0x941bb6 tsubst_template_args(tree_node*, tree_node*, int, tree_node*)
???:0
0x739946 tsubst_constraint(tree_node*, tree_node*, int, tree_node*)
???:0
0x949a91 tsubst_lambda_expr(tree_node*, tree_node*, int, tree_node*)
???:0
0x91c84f instantiate_decl(tree_node*, bool, bool)
???:0
0x7c6c0e maybe_instantiate_decl(tree_node*)
???:0
0x7c8370 mark_used(tree_node*, int)
???:0
0x6de097 build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
???:0
0x980c6c 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.
