https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101719
Bug ID: 101719
Summary: "Already defined" error in case of function
specialization with concept
Product: gcc
Version: 11.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: fchelnokov at gmail dot com
Target Milestone: ---
The following correct code:
```
#include <iostream>
constexpr int p(auto) { return 0; }
constexpr int q() { return p(0); }
constexpr int p(auto) requires true { return 1; }
static_assert(p(0) == 1);
static_assert(q() == 0);
int main()
{
std::cout << q() << p(0) << '\n';
}
```
produces the error
```
Error: symbol `_Z1pIiEiT_' is already defined
```
