#10250: segfault when multiplying QQ constant and SR vector (with user basis)
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Reporter: jason | Owner: jason, was
Type: defect | Status: new
Priority: major | Milestone:
Component: linear algebra | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by jason):
Okay, thanks to John Palmieri testing this out on various versions of
Sage, I found that reverting #9502 fixes the issue. I'm CCing the author
and reviewer of #9502. In short, #9502 causes a segfault with the
following code:
{{{
sage: V=(QQ^2).span_of_basis([[1,1]])
sage: v=V([1,1])
sage: x=sqrt(2)*v
sage: 3*x # but we get a segfault when multiplying x by something
------------------------------------------------------------
Unhandled SIGSEGV: A segmentation fault occurred in Sage.
This probably occurred because a *compiled* component
of Sage has a bug in it (typically accessing invalid memory)
or is not properly wrapped with _sig_on, _sig_off.
You might want to run Sage under gdb with 'sage -gdb' to debug this.
Sage will now terminate (sorry).
------------------------------------------------------------
}}}
Do you guys that did #9502 know what could have caused this?
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10250#comment:8>
Sage <http://www.sagemath.org>
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