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gh-103590: do not wrap a single exception raised from a try-except* #103665

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Merged
iritkatriel merged 10 commits into from
Apr 27, 2023
Merged

gh-103590: do not wrap a single exception raised from a try-except* #103665

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17a1311
gh-103590: do not wrap a single exception raised from a try-except*
iritkatriel Apr 21, 2023
6504e9b
📜🤖 Added by blurb_it.
blurb-it[bot] Apr 21, 2023
c4ffc7b
Merge branch 'main' into wrapping
iritkatriel Apr 22, 2023
3e8f08c
Merge branch 'main' into wrapping
ambv Apr 25, 2023
34bac84
Merge branch 'main' into wrapping
iritkatriel Apr 25, 2023
c3cdf7c
add to whatsnew
iritkatriel Apr 26, 2023
a557024
add issue ref to whatsnew
iritkatriel Apr 26, 2023
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whitespace
iritkatriel Apr 26, 2023
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Merge branch 'main' into wrapping
iritkatriel Apr 26, 2023
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typo
iritkatriel Apr 26, 2023
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gh-103590: do not wrap a single exception raised from a try-except*
  • Loading branch information
@iritkatriel
iritkatriel committed Apr 21, 2023
commit 17a13111d4f7101239a9f706ae2e5f4fabb30143
44 changes: 20 additions & 24 deletions Lib/test/test_except_star.py
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Original file line number Diff line number Diff line change
Expand Up @@ -636,18 +636,17 @@ def test_raise_handle_all_raise_one_named(self):
raise orig
except* (TypeError, ValueError) as e:
raise SyntaxError(3)
except BaseException as e:
except SyntaxError as e:
exc = e

self.assertExceptionIsLike(
exc, ExceptionGroup("", [SyntaxError(3)]))
self.assertExceptionIsLike(exc, SyntaxError(3))

self.assertExceptionIsLike(
exc.exceptions[0].__context__,
exc.__context__,
ExceptionGroup("eg", [TypeError(1), ValueError(2)]))

self.assertMetadataNotEqual(orig, exc)
self.assertMetadataEqual(orig, exc.exceptions[0].__context__)
self.assertMetadataEqual(orig, exc.__context__)

def test_raise_handle_all_raise_one_unnamed(self):
orig = ExceptionGroup("eg", [TypeError(1), ValueError(2)])
Expand All @@ -656,18 +655,17 @@ def test_raise_handle_all_raise_one_unnamed(self):
raise orig
except* (TypeError, ValueError) as e:
raise SyntaxError(3)
except ExceptionGroup as e:
except SyntaxError as e:
exc = e

self.assertExceptionIsLike(
exc, ExceptionGroup("", [SyntaxError(3)]))
self.assertExceptionIsLike(exc, SyntaxError(3))

self.assertExceptionIsLike(
exc.exceptions[0].__context__,
exc.__context__,
ExceptionGroup("eg", [TypeError(1), ValueError(2)]))

self.assertMetadataNotEqual(orig, exc)
self.assertMetadataEqual(orig, exc.exceptions[0].__context__)
self.assertMetadataEqual(orig, exc.__context__)

def test_raise_handle_all_raise_two_named(self):
orig = ExceptionGroup("eg", [TypeError(1), ValueError(2)])
Expand Down Expand Up @@ -791,23 +789,22 @@ def test_raise_handle_all_raise_one_named(self):
raise orig
except* (TypeError, ValueError) as e:
raise SyntaxError(3) from e
except BaseException as e:
except SyntaxError as e:
exc = e

self.assertExceptionIsLike(
exc, ExceptionGroup("", [SyntaxError(3)]))
self.assertExceptionIsLike(exc, SyntaxError(3))

self.assertExceptionIsLike(
exc.exceptions[0].__context__,
exc.__context__,
ExceptionGroup("eg", [TypeError(1), ValueError(2)]))

self.assertExceptionIsLike(
exc.exceptions[0].__cause__,
exc.__cause__,
ExceptionGroup("eg", [TypeError(1), ValueError(2)]))

self.assertMetadataNotEqual(orig, exc)
self.assertMetadataEqual(orig, exc.exceptions[0].__context__)
self.assertMetadataEqual(orig, exc.exceptions[0].__cause__)
self.assertMetadataEqual(orig, exc.__context__)
self.assertMetadataEqual(orig, exc.__cause__)

def test_raise_handle_all_raise_one_unnamed(self):
orig = ExceptionGroup("eg", [TypeError(1), ValueError(2)])
Expand All @@ -817,23 +814,22 @@ def test_raise_handle_all_raise_one_unnamed(self):
except* (TypeError, ValueError) as e:
e = sys.exception()
raise SyntaxError(3) from e
except ExceptionGroup as e:
except SyntaxError as e:
exc = e

self.assertExceptionIsLike(
exc, ExceptionGroup("", [SyntaxError(3)]))
self.assertExceptionIsLike(exc, SyntaxError(3))

self.assertExceptionIsLike(
exc.exceptions[0].__context__,
exc.__context__,
ExceptionGroup("eg", [TypeError(1), ValueError(2)]))

self.assertExceptionIsLike(
exc.exceptions[0].__cause__,
exc.__cause__,
ExceptionGroup("eg", [TypeError(1), ValueError(2)]))

self.assertMetadataNotEqual(orig, exc)
self.assertMetadataEqual(orig, exc.exceptions[0].__context__)
self.assertMetadataEqual(orig, exc.exceptions[0].__cause__)
self.assertMetadataEqual(orig, exc.__context__)
self.assertMetadataEqual(orig, exc.__cause__)

def test_raise_handle_all_raise_two_named(self):
orig = ExceptionGroup("eg", [TypeError(1), ValueError(2)])
Expand Down
7 changes: 6 additions & 1 deletion Objects/exceptions.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1421,7 +1421,12 @@ _PyExc_PrepReraiseStar(PyObject *orig, PyObject *excs)
if (res < 0) {
goto done;
}
result = _PyExc_CreateExceptionGroup("", raised_list);
if (PyList_GET_SIZE(raised_list) > 1) {
result = _PyExc_CreateExceptionGroup("", raised_list);
}
else {
result = Py_NewRef(PyList_GetItem(raised_list, 0));
}
if (result == NULL) {
goto done;
}
Expand Down