Thanks for the comment. It's my first patch. :-)

> - the patch doesn't apply on Python 3.3

That latest patch file I generated against the tip of 3.1 branch. Should I create two separate patches for 3.1 and 3.2+ (which will apply on 3.3, as well)? Actually, this crash will reproduce on (from my testing) 2.7 with "-u" option on, as well...

>  - I don't want to commit the tests because they write 66000 * 2 characters to the test output, which floods the test output. I don't know how to create a fake stdout which is a TTY but not the real stdout, especially on Windows. I think that manual tests only once should be enough. Or does anyone know how to create a fake TTY output?

I have a few ideas to work around this and still have a unit test...