Josh Rosenberg added the comment:

Never know whether to comment on issue itself, but just in case:

There are issues with the patch when n < 0 is passed, as n is not sanity 
checked, which would break the Semaphore invariant (value must be >= 0). n == 0 
is also a weird value, but harmless if passed; release(0) would acquire and 
release the lock but otherwise act as a noop.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue10978>
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