</pre>

<p>
An interface type <code>T</code> may not embed a type element
that is, contains, or embeds <code>T</code>, directly or indirectly.
</p>

<pre>
// illegal: Bad may not embed itself
type Bad interface {
	Bad
}

// illegal: Bad1 may not embed itself using Bad2
type Bad1 interface {
	Bad2
}
type Bad2 interface {
	Bad1
}