[Issue 23339] Internal Compiler Error with extern(C++) class declared in function template

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23339

--- Comment #4 from naydef <naydef at abv.bg> ---
Sorry for the comment spam

Another example caused by the same issue, probably:
-----------------------------------------------
import std.stdio;
import std.traits;

extern(C++) class Delegate(string Linkage)
{
    void opCall()
    {
        string myString = Linkage;
    }
}

void main()
{
    auto special = new Delegate!("C");
}
-----------------------------------------------
onlineapp.d(14): Error: template instance `onlineapp.Delegate!"C"` Internal
Compiler Error: C++ `string` template value parameter is not supported
-----------------------------------------------

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