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| segfault when calling pOne() when currRing == NULL https://www.singular.uni-kl.de/forum/viewtopic.php?f=10&t=2472 |
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| Author: | jpflori [ Thu Nov 20, 2014 6:50 pm ] |
| Post subject: | segfault when calling pOne() when currRing == NULL |
Hi all, Still playing with Singular 3-1-7p1 in debug mode and Sage, we got a segfault when pOne gets called but currRing is not set. With Singular 3-1-6 it was not the case. See trac.sagemath.org/ticket/17184#comment:48 and following comments. I think the following commit might explain the behavior change: * bceefc05ad02b92a823faffb7a4a247a0da12fc0 Just removing the "#if 0" fixes our problem. Though it surely is better to fix the issue and leave it there, or revert the whole commit. Or should always make completely sure there is a currRing set? Best, JP |
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| Author: | hannes [ Fri Nov 21, 2014 6:54 pm ] |
| Post subject: | Re: segfault when calling pOne() when currRing == NULL |
All of the polynomial routines require a ring, as argument or via the global variable currRing. If such a ring does not exit, an error should be reported. The problem here is the place to check this: 3-1-6 does it during the resolution of reserved names (IsCmd) while 4-0-0 should check during the evaluation of expressions. The easiest way to fix it is really to change the "#if 0" to "#if 1" as the check during the evaluation is missing and also not necessary for 3-1-7. |
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| Author: | jpflori [ Mon Nov 24, 2014 4:26 pm ] |
| Post subject: | Re: segfault when calling pOne() when currRing == NULL |
Thanks, that's exactly what I did! |
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