https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116952
Bug ID: 116952
Summary: Error on lambda NTTP argument to type constraint in
template parameter list of generic lambda
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: eczbek.void at gmail dot com
Target Milestone: ---
This causes an error:
```
template<typename, auto>
concept A = true;
auto b = []<A<[] {}>> {};
```
<source>:4:15: error: lambda-expression in template parameter type
4 | auto b = []<A<[] {}>> {};
| ^
<source>:4:13: error: template argument 2 is invalid
4 | auto b = []<A<[] {}>> {};
| ^~~
Compiler returned: 1
Compiler Explorer link: https://godbolt.org/z/WWG35bsdG
This code compiles fine with Clang and MSVC
