#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):
I think that the appropriate action is not getting registered (which is a
problem with the parent), leading to all sorts of weirdness as the
coercion system tries to do things. It can't register the action because
when it asks for the action (using the get_action method of the parent),
it segfaults.
{{{
sage: v.parent().get_action(3.parent(), operator.mul, False)
Left scalar multiplication by Integer Ring on Vector space of degree 2 and
dimension 1 over Rational Field
User basis matrix:
[1 1]
sage: x.parent().get_action(3.parent(), operator.mul, False)
------------------------------------------------------------
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).
------------------------------------------------------------
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10250#comment:14>
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