Question

I normally run tests for specific django apps, but I was curious and decided to run the entire test suite (which includes django tests) with

./manage.py test

The test suite freezes.

To find out why/where, I ran

./manage.py test -v 2

and it appears that the test stops working at

 test_date_length (django.contrib.auth.tests.tokens.TokenGeneratorTest) ... 

This behavior happens for both django 1.3 and django 1.4+ (trunk).

Would appreciate any pointers on why this is happening.

Answer 1

After some debugging, I discovered that this problem is a result of a Python (2.7) bug compiled by clang via MacPorts.

A loop that is executed by Python in Django code base during the execution of the TokenGeneratorTest

factor = 0
while True:
    factor += 1
    if i < 36 ** factor:
        factor -= 1
        break

hangs on Python 2.7 compiled by clang (via MacPorts).

I recompiled my Python 2.7 with apple-gcc-4.2 and this while loop no longer freezes when given a large i value.