Opened 6 years ago

Closed 6 years ago

#17541 closed defect (wontfix)

Segmentation fault in lrcalc

Reported by: thansen Owned by: sage-combinat
Priority: major Milestone: sage-duplicate/invalid/wontfix
Component: packages: standard Keywords: lrcalc
Cc: Merged in:
Authors: Reviewers: Travis Scrimshaw
Report Upstream: Reported upstream. No feedback yet. Work issues:
Branch: Commit:
Dependencies: Stopgaps:

Description

Hi,

I have some code that relies heavily on lrcalc and when the input gets more complicated it starts crashing. I managed to find the following minimal code example that usually crashes Sage here (run it repeatedly if it does not crash at once): 

import sage.libs.lrcalc.lrcalc as lrcalc

def lrcalc_test():
    a=lrcalc.coprod([5,4,3,2,1])
    b=lrcalc.mult([3,2,0],[0])
    c=lrcalc.coprod([0])
    d=lrcalc.mult([3,2,0],[0,1])

I am using Sage 6.4.1 (with lrcalc 1.1.7) on Ubuntu 12.04 amd64.

The output of sage is attached.

Attachments (1)

sage_crash_output​ (4.9 KB) - added by thansen 6 years ago.

Download all attachments as: .zip

Change History (6)

Changed 6 years ago by thansen

comment:1 Changed 6 years ago by thansen

  • Report Upstream changed from Not yet reported upstream; Will do shortly. to Reported upstream. No feedback yet.

comment:2 Changed 6 years ago by thansen

  • Milestone changed from sage-6.5 to sage-duplicate/invalid/wontfix

I just realized that the problem was that [0,1] is invalid input. I changed the milestone to invalid.

comment:3 Changed 6 years ago by tscrim

  • Reviewers set to Travis Scrimshaw
  • Status changed from new to needs_review

comment:4 Changed 6 years ago by tscrim

  • Status changed from needs_review to positive_review

While the crash is bad, the fact that you're working directly with the library (after importing it) means we shouldn't worry about it. (In short, I agree.)

comment:5 Changed 6 years ago by vbraun

  • Resolution set to wontfix
  • Status changed from positive_review to closed
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