Big pile of exceptions

So I was using IDEA 139.872.1 with plugin version plugin version 1.2.44
and I wanted to use a construct that I couldn't remember the syntax for
and Scala started throwing exceptions (13 different ones) and corrupted
the cache. I had to invalidate the cache and restart to get everything
working correctly. I reported all of the exceptions, but with that many,
I didn't bother with the numbers.