#21007: Unhelpful error when using "r" as symbolic variable
----------------------------+-------------------------
Reporter: rws | Type: defect
Status: new | Priority: major
Milestone: sage-7.3 | Component: symbolics
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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{{{
sage: 1/r^(1/3)
...
/home/ralf/sage/src/sage/symbolic/ring.pyx in
sage.symbolic.ring.SymbolicRing._element_constructor_
(build/cythonized/sage/symbolic/ring.cpp:6620)()
340 return prod([SR(p)**e for p,e in x], SR(x.unit()))
341 else:
--> 342 raise TypeError
343
344 return new_Expression_from_GEx(self, exp)
TypeError:
}}}
Fresh Sage has `r` defined as the R interpreter. Granted I only stumbled
over this only after years but still, this exception should print `r` like
when you do `r+1` and get `TypeError: unsupported operand parent(s) for
'+': '<class 'sage.interfaces.r.R'>' and 'Integer Ring'`.
--
Ticket URL: <https://trac.sagemath.org/ticket/21007>
Sage <http://www.sagemath.org>
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