When I depickle elements of SymbolicRing, they have different parents
even though there should be only one SymbolicRing.
sage: save(sqrt(2), "x")
sage: save(sqrt(2), "y")
sage: y = load("y")
sage: x = load("x")
sage: x*y
---------------------------------------------------------------------------
<type 'exceptions.RuntimeError'> Traceback (most recent call last)
/scratch/sage-2.3/<ipython console> in <module>()
/scratch/sage-2.3/element.pyx in element.RingElement.__mul__()
/scratch/sage-2.3/element.pyx in element.bin_op_c()
/scratch/sage-2.3/element.pyx in element.canonical_coercion_c()
/scratch/sage-2.3/element.pyx in element._verify_canonical_coercion_c()
<type 'exceptions.RuntimeError'>: There is a bug in the coercion code in SAGE.
Both x (= sqrt(2)) and y (=
sqrt(2)) are supposed to have identical parents
but they don't.
In fact, x has parent 'Symbolic Ring'
whereas y has parent 'Symbolic Ring'
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