[issue13193] test_packaging and test_distutils failures
Vinay Sajip
report at bugs.python.org
Sat Nov 5 22:47:29 CET 2011
Vinay Sajip <vinay_sajip at yahoo.co.uk> added the comment:
> FTR, I haven't checked this on Ubuntu 32-bit. It's rather odd for the
> failure to be architecture-dependent. Are these two machines running
> different versions of Ubuntu, perhaps?
They are (Ubuntu Natty 32-bit failing, Ubuntu Oneiric 64-bit passing).
However, I don't believe the failure is directly architecture-related, but
indirectly so. For example, test execution order might not be identical
on all machines, depending for example on hash values and dict bucket
sizes, which I would expect to be different on different machines for any
number of reasons. In my limited testing, I found the following:
Ubuntu Natty 32-bit - failed.
Windows 7 32-bit - failed.
Ubuntu Oneiric 64-bit - passed.
Linux Mint "Katya" 11 64-bit (based on Ubuntu Natty) - passed.
With non-deterministic test execution order combined with module-level
data updated by tests, it can be hard to reproduce these failures - a bit
like uninitialised data errors in C :-(
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