Debug process won't finish when "Collect run-time types information for code insight" is on

I wanted to try the collection of type information feature but I found that once I enable the option in PyCharm preferences, Debug runs do not finish anymore. The program executes normally, but then the debugger process just seems to hand. Same happens with tests, all tests go green in the Test Console but the wheel next to "Running tests..." never stops spinning.

When I disable run-time type collection during debugging runs, the debugged processes will terminate as expected.

Can anyone reproduce this behavior? Is there some way I can find out what it going on? There is no output on the console or anywhere I could find that gives a hint on the problem.

I'm using PyCharm CE 4.0.5. under MacOSX Yosemite 10.10.2. and I've tried the Python 2.7.6. interpreter coming with OSX as well as Python 2.7.9. from Anaconda.