[issue21884] turtle regression of issue #21823: "uncaught exception" on "AMD64 Snow Leop 3.x" buildbot
Terry J. Reedy
report at bugs.python.org
Mon Jun 30 17:20:33 CEST 2014
Terry J. Reedy added the comment:
(Brett, the question is about import.)
The problem is the mode call in clock.py, which I will move today as part of 21882.
I am sorely puzzled that the patch in #21823 could have changed the effect of mode(). There are only two changes, only one of which could be relevant.
1.
from turtle import *
+from turtle import Terminator # not in __all__
mode()
My understanding is that the newly added second import should just add a reference to Terminator in the existing module. It is a standard Exception subclass: from turtle.py, "class Terminator(Exception): pass". I could and will add 'Terminator' to __all__ instead, but it seems to me that the added statement *should* be innocuous.
What am I missing? Does __all__ change the import machinery in the calls to frozen importlib.bootstrap or do these call always happen behind the scene with any import? From the most recent first traceback:
...
File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/turtledemo/clock.py", line 17 in <module>
File "<frozen importlib._bootstrap>", line 321 in _call_with_frames_removed
File "<frozen importlib._bootstrap>", line 1420 in exec_module
File "<frozen importlib._bootstrap>", line 1149 in _load_unlocked
File "<frozen importlib._bootstrap>", line 2175 in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 2186 in _find_and_load
File "<string>", line 1 in <module>
File "/Users/buildbot/buildarea/3.x.murray-snowleopard/build/Lib/test/test___all__.py", line 23 in check_all
...
2. Added a try:except: within a function, not called on import, to catch previously uncaught Terminator exception.
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nosy: +brett.cannon
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