Message 347627 - Python tracker

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Author	daveb
Recipients	daveb
Date	2019-07-10.17:52:05
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1562781125.98.0.893970984377.issue37549@roundup.psfhosted.org>
In-reply-to

Content
os.dup(fd) generates an OSError for standard streams (0: stdin, 1: stdout, 2: stderr) on Windows 7. Works as expected on Windows 10. Working backwards we found the issue first appears in Python 3.7.4rc1 and 3.8.0b2 on Windows 7. Earlier releases work as expected. >>> import os >>> os.dup(1) Traceback (most recent call last): File "<stdin>", line 1, in <module> OSError: [WinError 87] The parameter is incorrect >>>

os.dup(fd) generates an OSError for standard streams (0: stdin, 1: stdout, 2: stderr) on Windows 7.  Works as expected on Windows 10.

Working backwards we found the issue first appears in Python 3.7.4rc1 and 3.8.0b2 on Windows 7.  Earlier releases work as expected.

>>> import os
>>> os.dup(1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OSError: [WinError 87] The parameter is incorrect
>>>

History
Date	User	Action	Args
2019-07-10 17:52:06	daveb	set	recipients: + daveb
2019-07-10 17:52:05	daveb	set	messageid: <1562781125.98.0.893970984377.issue37549@roundup.psfhosted.org>
2019-07-10 17:52:05	daveb	link	issue37549 messages
2019-07-10 17:52:05	daveb	create