Mixin template parameter overloading bug?

[Andrey Zherikov]

On Saturday, 14 June 2025 at 03:17:09 UTC, monkyyy wrote:
> 
>
> ```d
> import std;
> mixin template f(int function(int) F){}
> mixin template f(void function(int) 
> F){unittest{"void".writeln;}}
>
> //mixin f!((_){}); //FAILS
>
>
> mixin template g(void function(int) 
> F){unittest{"void".writeln;}}
> mixin template g(int function(int) F){}
>
> mixin g!((_){});  //works
> ```
> this example makes it purely a compiler bug
>
> I cant escape any useful information(I tried `typeof(return)`), 
> seems to be limited to just void return functions

I created https://github.com/dlang/dmd/issues/21447