New submission from Eric V. Smith <e...@trueblade.com>:
If either of these lines are added to test_annotations() in
Lib/test/test_future.py, a SystemError will be raised:
eq("(x:=10)")
eq("f'{(x:=10):=10}'")
Traceback (most recent call last):
File "/Users/eric/local/python/cpython/Lib/test/test_future.py", line 258, in
test_annotations
eq("(x:=10)")
File "/Users/eric/local/python/cpython/Lib/test/test_future.py", line 134, in
assertAnnotationEqual
actual = self.getActual(annotation)
File "/Users/eric/local/python/cpython/Lib/test/test_future.py", line 121, in
getActual
exec(self.template.format(ann=annotation), {}, scope)
SystemError: unknown expression kind
----------
components: Interpreter Core
messages: 341699
nosy: emilyemorehouse, eric.smith, lukasz.langa
priority: release blocker
severity: normal
stage: needs patch
status: open
title: ast_unparser.c doesn't handle := expressions
type: behavior
versions: Python 3.8
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue36826>
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