7473 – [CTFE] Non-ref argument behaves as if it's a ref argument

The following code cannot be compiled by dmd v2.057 and v2.058(DEBUG).
 struct S{
 int i;
 }
 static assert({
 S s = S(1);
 assert(s.i == 1);
 fun(s);
 assert(s.i == 1); // fails!!
 return true;
 }());
 void fun(S s){
 s.i = 2;
 }

Not a regression - failed on D1.072.

https://github.com/D-Programming-Language/dmd/pull/761 

Commit pushed to dmd-1.x at https://github.com/D-Programming-Language/dmd
https://github.com/D-Programming-Language/dmd/commit/74a20d1ecddf6a677e73a08d2970db18856e49e5
fix Issue 7473 - [CTFE] Non-ref argument behaves as if it's a ref argument