erik-kallen/SaltarelleCompiler — pull request #228 by jam40jeff (2013-07-27 01:13:06+00:00)
Title: Type system does not honor covariance and contravariance for IsAssignableFrom().

Given the following type definitions:

````
private interface I
{
}

private interface I : I
{
}

private class C : I
{
}
````

The following assignments are all valid:

````
I i1 = null;
I