In Sage 9.2 and earlier one has:
sage: RIF(1.0) < 2.0
True
sage: RIF(1.0, 3.0) < 2.0
False
but in Sage 9.3beta8 (most recent docker image) such comparisons raise the
below exception.
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-1-4b034be5c139> in <module>
----> 1 RIF(RealNumber('1.0')) < RealNumber('2.0')
~/sage/local/lib/python3.9/site-packages/sage/structure/element.pyx in
sage.structure.element.Element.__richcmp__
(build/cythonized/sage/structure/element.c:10370)()
1109 return (<Element>self)._richcmp_(other, op)
1110 else:
-> 1111 return coercion_model.richcmp(self, other, op)
1112
1113 cpdef _richcmp_(left, right, int op):
~/sage/local/lib/python3.9/site-packages/sage/structure/coerce.pyx in
sage.structure.coerce.CoercionModel.richcmp
(build/cythonized/sage/structure/coerce.c:20790)()
2004 # so we raise an exception.
2005 if op == Py_LT:
-> 2006 raise bin_op_exception('<', x, y)
2007 elif op == Py_LE:
2008 raise bin_op_exception('<=', x, y)
TypeError: unsupported operand parent(s) for <: 'Real Interval Field with
53 bits of precision' and 'Real Field with 53 bits of precision'
Is this change intensional or is this a regression? I noticed because some
of SnapPy's doctests fail on 9.3beta8.
Thanks,
Nathan
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