#17740: Division of modules by basering elements should not pass to the fraction
field.
-------------------------------------+-------------------------------------
Reporter: robertwb | Owner:
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.5
Component: coercion | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/vdelecroix/17440 | 96c1a0348964c4edbd42f3fc52e93b9e76f26156
Dependencies: | Stopgaps:
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Comment (by vdelecroix):
Replying to [comment:11 vdelecroix]:
> And something is broken:
> {{{
> sage -t schemes/toric/divisor.py
> }}}
The problematic line is `module_action = type(self)(K, self.codomain())`
in `coerce_action.pyx`
{{{
sage: dP6 = toric_varieties.dP6()
sage: Dx,Du,Dy,Dv,Dz,Dw = dP6.toric_divisor_group().gens()
sage: A = RightModuleAction(ZZ, Dx.parent())
sage: ~A
Traceback (most recent call last):
...
472 print "self.codomain = {}".format(self.codomain())
--> 473 module_action = type(self)(K, self.codomain())
474 connecting = K.coerce_map_from(self.G)
...
CoercionException: No common base
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/17740#comment:12>
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