vary behaves in an odd way

Question

Here is a short example of what I found weird:

ex:= 2(r)**(-2) - B(r); vary(_, $B(r) -> \delta{B}$);

from which I get

2 {r}^{-2} - \delta\left(B\left(r\right)\right)

I tought that it was due to my older version of cadabra, but I just installed the latest version and the answer is the same. If I had in the first term just r, without an exponent, the answer woud be correct.

Thanks, Andrei

Answer 1

The trivial cases always slip the net somehow... Now fixed on the devel branch, will go into 2.5.16. Thanks for reporting.