Message 213760 - Python tracker

Message213760

Author	gdr@garethrees.org
Recipients	Jeffrey.Walton, gdr@garethrees.org, vstinner
Date	2014-03-16.21:22:04
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1395004924.83.0.669965701773.issue20941@psf.upfronthosting.co.za>
In-reply-to

Content
> How did you get this warning? This looks like runtime output from a program built using Clang/LLVM with -fsanitize=undefined. See here: http://clang.llvm.org/docs/UsersManual.html#controlling-code-generation Signed integer overflow is undefined behaviour, so by the time *sec = (time_t)intpart has been evaluated, the undefined behaviour has already happened. It is too late to check for it afterwards.

Content

> How did you get this warning?

This looks like runtime output from a program built using Clang/LLVM with -fsanitize=undefined. See here: http://clang.llvm.org/docs/UsersManual.html#controlling-code-generation

Signed integer overflow is undefined behaviour, so by the time *sec = (time_t)intpart has been evaluated, the undefined behaviour has already happened. It is too late to check for it afterwards.

History
Date	User	Action	Args
2014-03-16 21:22:04	gdr@garethrees.org	set	recipients: + gdr@garethrees.org, vstinner, Jeffrey.Walton
2014-03-16 21:22:04	gdr@garethrees.org	set	messageid: <1395004924.83.0.669965701773.issue20941@psf.upfronthosting.co.za>
2014-03-16 21:22:04	gdr@garethrees.org	link	issue20941 messages
2014-03-16 21:22:04	gdr@garethrees.org	create