`\Ref` in heaplang.sty clashes with newer versions of the hyperref package
I (and @amintimany at least) have experienced some oddities when using \Ref
macro.
It seems that the culprit is the hyperref
package, although I have not always had the problem.
I suppose the easiest course of action would be to change the name of the \Ref
macro.
The problem seem to manifest in the current official version of the technical reference too