I'm seeing test_strptime failures on this box, running
a version of Fedora Core that's between 1 and the new
test release.

test test_strptime failed -- Traceback (most recent
call last): 
File "Lib/test/test_strptime.py", line 258, in
test_timezone
    self.failUnlessEqual(strp_output.tm_isdst, 0)
AssertionError: -1 != 0

Note that the following line (which tests GMT) also
fails with a -1.

The underlying failure:
>>> import _strptime
>>> strp_output = _strptime.strptime("UTC", "%Z")
>>> strp_output.tm_isdst
-1
>>> strp_output = _strptime.strptime("GMT", "%Z")
>>> strp_output.tm_isdst
-1

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Anthony, can you let me know what the following commands spit out?::

import time; import _strptime
time.tzname
time.daylight
_strptime.LocaleTime().timezone
_strptime.TimeRE()['Z']

That should be enough info for me to debug this.

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Very very strange. I rebuilt python, and the problem has
gone away. I will assign this to myself and try and
reproduce it. 

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A possible cause for this, Anthony, is having the timezone set to ("UTC", 
"GMT") and time.daylight to a 1.  This would lead to not passing the test 
since there is an explicit test in the strptime code for when duplicate 
non-DST and DST timezones are the same and this would do it since UTC 
and GMT are injected into the non-DST timezone list for comparisons.  
The default is -1 since you can't tell the proper value if both non-DST and 
DST are the same.  And UTC and GMT should not be considered DST 
timezones obviously.

Anyway, I hope you don't find anything wrong and it was just a weird 
glitch in the date settings.

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Fixed in rev. 1.31 .  Basically tweaked the test that checks if 
time.tzname[0] == time.tzname[1] (which is bad since then you can't 
tell when DST is in effect or not) to take into acct. if time.tzname[1] (the 
DST timezone) is set to UTC or GMT.  Since there is no adjustment, then 
just set let be set to 0 through the normal algorithm.