> a/test
$ exists run-1
> b/test
$ exists run-2
> a/test
> b/test
$ absent run-3
> a / Other / test
$ exists run-3
> a / Other / test
$ absent run-4
$ delete diskcache
> b/test
$ exists run-4
> a/test
$ exists run-5
> b/test
> a/test
$ absent run-6
> set a / platform := "other-runtime"
> a/test
$ exists run-6
> a/test
$ absent run-7
