AliasSeq + isExpression type specialization behavior

[Brian Schott via Digitalmars-d-learn]

Given the following code:
```
import std.meta;

static assert(is(char : dchar));
static assert(is(AliasSeq!(int, char) : AliasSeq!(int, char)));
static assert(is(AliasSeq!(int, char) : AliasSeq!(int, dchar)));
```

The third static assert fails. Should it, given that the first 
and second pass?