Virtual document cache not invalidated after with keyword processed

[tsandall]

The virtual document cache is not being invalidated after the with keyword is processed. As a result, if the same rule is evaluated twice (once using with and again without using with) the second rule evaluation will return the result of the first. E.g.,

package x

p { input.x = 1 }
q { p with input as {"x": 1} }

Query: data.x

If OPA evaluates p after q the cache will not have been invalidated and the result will be {p: true, q: true}.