Message271118
| Author | martin.panter |
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| Recipients | Jeffrey.Walton, alex, alexandre.vassalotti, christian.heimes, deadshort, dmalcolm, donmez, fweimer, gregory.p.smith, jcea, jwilk, loewis, mark.dickinson, martin.panter, matejcik, nnorwitz, pitrou, python-dev, serhiy.storchaka, vstinner, xiang.zhang, ztane |
| Date | 2016-07-24.00:10:29 |
| SpamBayes Score | -1.0 |
| Marked as misclassified | Yes |
| Message-id | <1469319029.58.0.453893802721.issue1621@psf.upfronthosting.co.za> |
| In-reply-to |
| Content | |
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The error message comes from Undefined Behaviour Sanitizer, which was added to newer versions of GCC and Clang. Currently I am compiling with ./configure --with-pydebug CC="gcc -fsanitize=undefined -fno-sanitize=alignment -fno-sanitize=shift" https://gcc.gnu.org/onlinedocs/gcc/Instrumentation-Options.html#index-fsanitize_003dundefined-962 I thought it is worth adding a test for the impossible __length_hint__() value. Since the test iterator returns no elements, there will not be a MemoryError, but if overflow detection is enabled (such as UB Sanitizer or -ftrapv), it is guaranteed to exercise the overflow path and would be detected. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2016-07-24 00:10:29 | martin.panter | set | recipients: + martin.panter, loewis, nnorwitz, gregory.p.smith, jcea, mark.dickinson, pitrou, vstinner, christian.heimes, alexandre.vassalotti, donmez, matejcik, jwilk, alex, dmalcolm, python-dev, deadshort, serhiy.storchaka, ztane, fweimer, Jeffrey.Walton, xiang.zhang |
| 2016-07-24 00:10:29 | martin.panter | set | messageid: <1469319029.58.0.453893802721.issue1621@psf.upfronthosting.co.za> |
| 2016-07-24 00:10:29 | martin.panter | link | issue1621 messages |
| 2016-07-24 00:10:29 | martin.panter | create | |