6325 – ICE(glue.c) forward reference error in template constraint

Original test-case was posted as comment for Issue6296. IMHO, it isn't a duplicate of those issue. DustMite-d testcase:
template Rebindable(T) if( is(T) )
{
}
template hasUnsharedAliasing(R : Rebindable!R)
{
}
struct S
{
 static Z f() { assert(0); }
 alias typeof(this) Z;
}
void main()
{
 S.f();
}

One note: the main() is unnecessary for me.

(In reply to comment #1)
> One note: the main() is unnecessary for me.
For me it isn't unnecessary to call it "main". It can be "g", but it must contain this body.

Sorry, main() is unnecessary if I compile with -g.

Corrected version of my previous comment:
For me it isn't necessary to call it "main" (if compiling without -g). It can be "f" or "g", but it must contain "S.f();" in it's body.

$ dmd -c bug6325.d 
DMD v2.054 DEBUG
ty = 36, '_error_'
access violation
and after removing the templates:
$ dmd -c bug6325.d 
DMD v2.054 DEBUG
ty = 38, 'typeof(this)'
Error: forward reference of typeof(this)
ty = 38, 'typeof(this)'
Error: forward reference of typeof(this)
Linux x64

Probably the same issue as bug 6774.

This compiles without error on dmd 2.064 head.