[Python-checkins] cpython (3.5): Issue #25390: typing: Don't crash on Union[str, Pattern].
guido.van.rossum
python-checkins at python.org
Mon Oct 19 17:56:43 EDT 2015
https://hg.python.org/cpython/rev/955d3faf727a
changeset: 98800:955d3faf727a
branch: 3.5
parent: 98798:43c63dd2f383
user: Guido van Rossum <guido at python.org>
date: Mon Oct 19 14:55:47 2015 -0700
summary:
Issue #25390: typing: Don't crash on Union[str, Pattern].
files:
Lib/test/test_typing.py | 4 ++++
Lib/typing.py | 3 +++
Misc/NEWS | 2 ++
3 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -317,6 +317,10 @@
with self.assertRaises(TypeError):
isinstance(42, Union[int, str])
+ def test_union_str_pattern(self):
+ # Shouldn't crash; see http://bugs.python.org/issue25390
+ A = Union[str, Pattern]
+
class TypeVarUnionTests(TestCase):
diff --git a/Lib/typing.py b/Lib/typing.py
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -487,6 +487,9 @@
return Any
if isinstance(t1, TypeVar):
continue
+ if isinstance(t1, _TypeAlias):
+ # _TypeAlias is not a real class.
+ continue
if any(issubclass(t1, t2)
for t2 in all_params - {t1} if not isinstance(t2, TypeVar)):
all_params.remove(t1)
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -45,6 +45,8 @@
Library
-------
+- Issue #25390: typing: Don't crash on Union[str, Pattern].
+
- Issue #25441: asyncio: Raise error from drain() when socket is closed.
- Issue #25410: Cleaned up and fixed minor bugs in C implementation of
--
Repository URL: https://hg.python.org/cpython
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