Opened 11 years ago

Last modified 9 years ago

#9880 closed defect

Segfault in PyNaC 0.2.0.p4 — at Version 1

Reported by: jpflori Owned by: burcin
Priority: major Milestone: sage-5.11
Component: symbolics Keywords: pynac spkg
Cc: kcrisman, zimmerma Merged in:
Authors: Reviewers:
Report Upstream: N/A Work issues:
Branch: Commit:
Dependencies: Stopgaps:

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Description (last modified by burcin)

Here is a short example found by Burcin and reproducing the bug: 

b = [var('b_%s'%i) for i in range(4)]

precomp = (2^b_2 + 2)*(2^b_1 + 2^(-b_1) + 2^b_1*2^b_0 - 2^b_1*2^(-b_0)
- 2^(-b_1)*2^b_0 - 2^(-b_1)*2^(-b_0) + 2^b_0 + 2^(-b_0) - 9) + (2^b_1 +
2^(-b_1) + 2^b_1*2^b_0 - 2^b_1*2^(-b_0) - 2^(-b_1)*2^b_0 -
2^(-b_1)*2^(-b_0) + 2^b_0 + 2^(-b_0) - 9)/2^b_2

repl_dict = {b_0: b_0, b_3: b_1, b_2: b_3, b_1: b_2}
P = precomp.substitute(repl_dict)
P.expand()

This is already being discussed here: ​http://groups.google.com/group/sage-support/browse_thread/thread/7c85f02c76012722

Change History (1)

comment:1 Changed 11 years ago by burcin

  • Description modified (diff)
  • Milestone set to sage-4.6
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