Bug in PARI/GP (Segmentation Fault) - compute error

Message boards : Number crunching : Bug in PARI/GP (Segmentation Fault) - compute error
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Profile lakewik

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Message 1580 - Posted: 5 Mar 2016, 12:06:21 UTC

This workunit: http://numberfields.asu.edu/NumberFields/workunit.php?wuid=14387582 have a bug and ending with computation error.
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Profile Eric Driver
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Message 1581 - Posted: 5 Mar 2016, 16:26:42 UTC - in response to Message 1580.  

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Profile Aurel
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Message 1592 - Posted: 12 Mar 2016, 12:28:03 UTC - in response to Message 1581.  

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Matt Kowal
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Message 1593 - Posted: 12 Mar 2016, 13:28:49 UTC - in response to Message 1592.  
Last modified: 12 Mar 2016, 13:30:28 UTC

Same :

http://numberfields.asu.edu/NumberFields/workunit.php?wuid=14396632

Does "Too many errors (may have bug)" mean this workunit has already been flagged?
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Profile Eric Driver
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Message 1594 - Posted: 12 Mar 2016, 15:30:33 UTC - in response to Message 1592.  

Thank you for reporting this.


Same here:

http://numberfields.asu.edu/NumberFields/workunit.php?wuid=14745368
http://numberfields.asu.edu/NumberFields/workunit.php?wuid=14728000
http://numberfields.asu.edu/NumberFields/workunit.php?wuid=14724079


Note that the last one was completed successfully on the 5th try. This is an example of a long standing issue that I have been unable to track down - many users get seg faults but when I run the WU stand alone, it finishes just fine (as it did here on the 5th try). Seems to happen more often with the lower discriminant subfields, where it tests many more polynomials and spends more time doing numberfield discriminant calculations.
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Profile Eric Driver
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Message 1595 - Posted: 12 Mar 2016, 15:33:03 UTC - in response to Message 1593.  

Same :

http://numberfields.asu.edu/NumberFields/workunit.php?wuid=14396632

Does "Too many errors (may have bug)" mean this workunit has already been flagged?


"Too many errors" means it has had a computation error too many times and the server has automatically flagged it (and also canceled it).
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Dj Ninja

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Message 1604 - Posted: 17 Mar 2016, 12:20:40 UTC

Hi there!

I had one of these WUs too which crashed with the PARI segmentation fault.
http://numberfields.asu.edu/NumberFields/workunit.php?wuid=15008080
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Dj Ninja

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Message 1607 - Posted: 24 Mar 2016, 10:49:19 UTC

another one ...
http://numberfields.asu.edu/NumberFields/workunit.php?wuid=14990272
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Profile Eric Driver
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Message 1609 - Posted: 24 Mar 2016, 16:19:18 UTC - in response to Message 1607.  

Thanks for reporting. I remove these from the server when I am made aware of them.
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Message boards : Number crunching : Bug in PARI/GP (Segmentation Fault) - compute error


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