https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110242
Bug ID: 110242
Summary: ICE on valid (decltype with lambda)
Product: gcc
Version: 12.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: stevenxia990430 at gmail dot com
Target Milestone: ---
The following program reports an internal compiler error: error reporting
routines re-entered.
To quickly reproduce: https://gcc.godbolt.org/z/h4aG89rWT
```
#include <tuple>
template <typename Tuple>
auto foo(const Tuple& t) -> decltype(([](auto&&... xs){return 0;})){
}
int main(){
const std::tuple<int> t{1};
return foo([](){ return 0;})(t);
}
```
Note that this code when tested on clang-trunk successfully compiles.
