#11596: Cached eigenstuff is mutable
------------------------------+---------------------------------------------
Reporter: rbeezer | Owner: jason, was
Type: defect | Status: new
Priority: major | Milestone: sage-4.8
Component: linear algebra | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by jason):
Change this in the def eigenvalues():
{{{
x = self.fetch('eigenvalues')
if not x is None:
if not extend:
x1=Sequence([])
for i in x:
if i in self.base_ring():
x1.append(i)
x=x1
return x
}}}
to this (add an else...)
{{{
x = self.fetch('eigenvalues')
if not x is None:
if not extend:
x1=Sequence([])
for i in x:
if i in self.base_ring():
x1.append(i)
x=x1
else:
x = copy(x)
return x
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11596#comment:2>
Sage <http://www.sagemath.org>
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