[Python-Dev] [Python-checkins] Python Regression Test Failures refleak (1)

[Tim Peters]

[Tim]
>> and filecmp contains a module-level _cache with a funky scheme for
>> avoiding file comparisons if various os.stat() values haven't changed.
>> But st_mtime on Windows doesn't necessarily change when a file is
>> modified -- it has limited resolution (2 seconds on FAT32, and I'm
>> having a hard time finding a believable answer for NTFS (which I'm
>> using)).

[Martin]
> The time stamp itself has a precision of 100ns (it really is a
> FILETIME).

Right -- see "believable" above ;-)

> I don't know whether there is any documentation that
> explains how often it is updated; I doubt it has a higher resolution
> than the system clock :-)

Me too.

>> Anyone bored enough to report what happens on Linux?

> I had to run it 18 times to get
>
> test_exceptions
> beginning 42 repetitions
> 123456789012345678901234567890123456789012
> ..........................................
> test_exceptions leaked [203, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
> 0] references
> 1 test OK.

Thank you!  I'm sorry to hear you were so bored ;-)

So here's a fun mystery for someone less sleepy than I am at this
time:  patch 1501987 (which I checked in) appears to have cured this,
but neither I nor its author seem to know why.  test_exceptions was
picking a pickle protocol at random (WTF?!), and the patch makes it
try all pickle protocols instead.

Now that I typed that, I discovered I really don't care why it cured
it, so it's all yours :-)