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Issue #4806: Avoid masking original TypeError in call with * unpacking

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Based on patch by Hagen Fürstenau and Daniel Urban.
This commit is contained in:
Martin Panter 2016-01-31 06:30:56 +00:00
parent 4c5ad9452b
commit b5944220ab
3 changed files with 58 additions and 13 deletions
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49
Lib/test/test_extcall.py
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@ -114,7 +114,7 @@ Verify clearing of SF bug #733667
>>> g(*Nothing())
Traceback (most recent call last):
...
TypeError: g() argument after * must be a sequence, not Nothing
TypeError: g() argument after * must be an iterable, not Nothing
>>> class Nothing:
... def __len__(self): return 5
@ -123,7 +123,7 @@ Verify clearing of SF bug #733667
>>> g(*Nothing())
Traceback (most recent call last):
...
TypeError: g() argument after * must be a sequence, not Nothing
TypeError: g() argument after * must be an iterable, not Nothing
>>> class Nothing():
... def __len__(self): return 5
@ -149,6 +149,45 @@ Verify clearing of SF bug #733667
>>> g(*Nothing())
0 (1, 2, 3) {}
Check for issue #4806: Does a TypeError in a generator get propagated with the
right error message? (Also check with other iterables.)
>>> def broken(): raise TypeError("myerror")
...
>>> g(*(broken() for i in range(1)))
Traceback (most recent call last):
...
TypeError: myerror
>>> class BrokenIterable1:
... def __iter__(self):
... raise TypeError('myerror')
...
>>> g(*BrokenIterable1())
Traceback (most recent call last):
...
TypeError: myerror
>>> class BrokenIterable2:
... def __iter__(self):
... yield 0
... raise TypeError('myerror')
...
>>> g(*BrokenIterable2())
Traceback (most recent call last):
...
TypeError: myerror
>>> class BrokenSequence:
... def __getitem__(self, idx):
... raise TypeError('myerror')
...
>>> g(*BrokenSequence())
Traceback (most recent call last):
...
TypeError: myerror
Make sure that the function doesn't stomp the dictionary
>>> d = {'a': 1, 'b': 2, 'c': 3}
@ -188,17 +227,17 @@ What about willful misconduct?
>>> h(*h)
Traceback (most recent call last):
...
TypeError: h() argument after * must be a sequence, not function
TypeError: h() argument after * must be an iterable, not function
>>> dir(*h)
Traceback (most recent call last):
...
TypeError: dir() argument after * must be a sequence, not function
TypeError: dir() argument after * must be an iterable, not function
>>> None(*h)
Traceback (most recent call last):
...
TypeError: NoneType object argument after * must be a sequence, \
TypeError: NoneType object argument after * must be an iterable, \
not function
>>> h(**h)