Message 229664 - Python tracker

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In-reply-to
Author	Knio
Recipients	Knio, pitrou, skrah
Date	2014年10月18日.22:13:53
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1413670433.7.0.452107994688.issue22668@psf.upfronthosting.co.za>

Content
When slicing or cloning a memoryview object that has been previously cast to change its format string, the new memoryview's format shares a pointer to the parent's format string, which may be deleted at any time. This manifests as a corrupt format when using the new memoryview object, causing crashes or unexpected behavior. Tested on: Python 3.4.0 (default, Apr 11 2014, 13:05:11) [GCC 4.8.2] on linux Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:45:13) [MSC v.1600 64 bit (AMD64)] on win32 Python 3.5.0a0 (default:cb8606fc84df, Oct 18 2014, 14:55:44) [GCC 4.8.2] on linux

Content

When slicing or cloning a memoryview object that has been previously cast to change its format string, the new memoryview's format shares a pointer to the parent's format string, which may be deleted at any time.
This manifests as a corrupt format when using the new memoryview object, causing crashes or unexpected behavior.
Tested on:
Python 3.4.0 (default, Apr 11 2014, 13:05:11) [GCC 4.8.2] on linux
Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:45:13) [MSC v.1600 64 bit (AMD64)] on win32
Python 3.5.0a0 (default:cb8606fc84df, Oct 18 2014, 14:55:44) [GCC 4.8.2] on linux

History
Date	User	Action	Args
2014年10月18日 22:13:53	Knio	set	recipients: + Knio, pitrou, skrah
2014年10月18日 22:13:53	Knio	set	messageid: <1413670433.7.0.452107994688.issue22668@psf.upfronthosting.co.za>
2014年10月18日 22:13:53	Knio	link	issue22668 messages
2014年10月18日 22:13:53	Knio	create

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