PyCharm and Pypy - Unresolved reference

Question

For some weird reason, my PyCharm loves to show unresolved errors everywhere.
But only with pypy. The source runs just fine, even PyCharm can run the code perfect.

But the red lines everywhere are really annoying.
The problem:

Ps.: I tried the Invalidate cache method, but it didn't help.

Answer 1

It's a known bug with PyPy support in PyCharm, see http://youtrack.jetbrains.com/issue/PY-9546.

The bug seems to be fixed now.