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Destructor of LocalTarget sometimes fails with AttributeError: 'LocalTarget' object has no attribute 'is_tmp' #3085

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merged 4 commits into from
Jan 11, 2022
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Destructor of LocalTarget sometimes fails with AttributeError: 'LocalTarget' object has no attribute 'is_tmp' #3085

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526f725
Add failing test for destructor in LocalTarget
umartin Jun 14, 2021
08c5d97
Added check for uninitialised attribute in destructor of LocalTarget
umartin Jun 14, 2021
dc20638
Merge branch 'master' into master
dlstadther Jan 11, 2022
2f70515
Merge branch 'master' into master
dlstadther Jan 11, 2022
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2 changes: 1 addition & 1 deletion luigi/local_target.py
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Original file line number Diff line number Diff line change
Expand Up @@ -186,5 +186,5 @@ def fn(self):
return self.path

def __del__(self):
if self.is_tmp and self.exists():
if hasattr(self, "is_tmp") and self.is_tmp and self.exists():
self.remove()
10 changes: 10 additions & 0 deletions test/local_target_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -354,3 +354,13 @@ def test_move_to_new_dir(self):
LocalTarget(src).open('w').close()
self.fs.move(src, dest)
self.assertTrue(os.path.exists(dest))


class DestructorTest(unittest.TestCase):

def test_destructor(self):
# LocalTarget might not be fully initialised if an exception is thrown in the constructor of LocalTarget or a
# subclass. The destructor can't expect attributes to be initialised.
t = LocalTarget(is_tmp=True)
del t.is_tmp
t.__del__()