On Sat, Mar 7, 2009 at 12:49 PM, Mike Hansen <mhan...@gmail.com> wrote:
> I'll rebase your coercion patches in the next hour.

I've rebased the patch at #5423.  I think the problem stems from this:

sage: f(x,y)=x+y-1
sage: C = f.parent(); C
Callable function ring with arguments (x, y)
sage: C.has_coerce_map_from(SR)
True
sage: SR.has_coerce_map_from(C)
True

--Mike

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