tree cf4036af894091891626668f883959ce2b01e7a3
parent cf6edbd7b0dc59b82311b65dcb62d5993349f577
author Patrick Walton <pcwalton@fb.com> 1627691108 -0700
committer Emilio Cobos Álvarez <emilio@crisal.io> 1629798655 +0200

Detect and avoid cycles when resolving items.

These can happen in certain cases involving incomplete qualified dependent
types. To avoid looping forever, we need to check for them.

Closes #2085.