6123 – [CTFE] Cannot call a template member method inside delegate/function literal with -inline.

Test case:
-------------------------
struct Bug6123(T) {
 void f() {}
 // can also trigger if the struct is normal but f is template
}
static assert({
 auto piece = Bug6123!int(); 
 piece.f();
 return true;
}());
-------------------------
Error: Cannot interpret &this at compile time
x.d(8): Error: cannot evaluate delegate bool()
{
Bug6123!(int) piece = Bug6123();
ref Bug6123!(int) this = piece;
 , assert(&this,"null this");
return true;
}
() at compile time
x.d(4): Error: static assert (delegate bool()
{
Bug6123!(int) piece = Bug6123();
ref Bug6123!(int) this = piece;
 , assert(&this,"null this");
return true;
}
()) is not evaluatable at compile time
-------------------------
(Why that 'assert' is generated in CTFE anyway?)

Fixed by implementing pointers in CTFE.
https://github.com/D-Programming-Language/dmd/commit/846aa2683ec63c364e72281c4c655387806558e2
D1 fix:
https://github.com/D-Programming-Language/dmd/commit/16c9700caab0bece92212c5e1a52b323258d7633