https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120595
Bug ID: 120595
Summary: internal compiler error: in tsubst_stmt, at
cp/pt.cc:19111 since 7.1
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mario.rodriguezb1 at um dot es
Target Milestone: ---
ICE on:
```
#include <tuple>
#include <functional>
#include <iostream>
struct Printer {
template<typename... Args>
void operator()(Args&&... args) {
std::apply(
[&args...](auto&&... args) {
([&args...](auto arg) {}(args), ...);
},
std::forward_as_tuple(args...));
}
};
int main() {
Printer{}(1, "foo", 0.5);
}
```
Stack dump
```
<source>:9:37: internal compiler error: in tsubst_stmt, at cp/pt.cc:19111
9 | ([&args...](auto arg) {}(args), ...);
| ^
0x282f1c5 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x284d556 internal_error(char const*, ...)
???:0
0xadeeec fancy_abort(char const*, int, char const*)
???:0
0xd56435 tsubst_lambda_expr(tree_node*, tree_node*, int, tree_node*)
???:0
0xd4fd54 tsubst_pack_expansion(tree_node*, tree_node*, int, tree_node*)
???:0
0xd5cafd instantiate_decl(tree_node*, bool, bool)
???:0
0xbe6aa3 maybe_instantiate_decl(tree_node*)
???:0
0xbe8817 mark_used(tree_node*, int)
???:0
0xb1b143 build_op_call(tree_node*, vec<tree_node*, va_gc, vl_embed>**, int)
???:0
0xd86ece finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
???:0
0xc3a2bb build_invoke(tree_node*, tree_node const*, int)
???:0
0xd90ddd finish_trait_expr(unsigned long, cp_trait_kind, tree_node*,
tree_node*)
???:0
0xd44901 tsubst_template_arg(tree_node*, tree_node*, int, tree_node*)
???:0
0xd550a9 tsubst_template_args(tree_node*, tree_node*, int, tree_node*)
???:0
0xd39acb tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0xd3a6c6 tsubst(tree_node*, tree_node*, int, tree_node*)
???:0
0xd6850b instantiate_class_template(tree_node*)
???:0
0xd7767b lookup_member(tree_node*, tree_node*, int, bool, int,
access_failure_info*)
???:0
0xc935a9 lookup_qualified_name(tree_node*, tree_node*, LOOK_want, bool)
???:0
0xd5cafd instantiate_decl(tree_node*, bool, bool)
???:0
```
To quickly reproduce:
https://godbolt.org/z/TPboErzY8
