CRAN error

[mpadge]

https://cran.r-project.org/web/checks/check_results_dodgr.html

Lots of sudden failures, all of which are:

 ══ Failed tests ════════════════════════════════════════════════════════════════
  ── Failure ('test-dists-categorical.R:12:5'): categorical dists ────────────────
  `graph <- weight_streetnet(hampi)` produced messages.
  ── Failure ('test-dists-categorical.R:97:5'): categorical dists summary ────────
  `graph <- weight_streetnet(hampi)` produced messages.
  ── Failure ('test-dists-categorical.R:116:5'): proportions only ────────────────
  `graph <- weight_streetnet(hampi)` produced messages.
  ── Failure ('test-dists-categorical.R:144:5'): categorical threshold ───────────
  `graph <- weight_streetnet(hampi)` produced messages.
  ── Failure ('test-dists-categorical.R:166:5'): categorical pairwise ────────────
  `graph <- weight_streetnet(hampi)` produced messages.
  ── Failure ('test-dists-nearest.R:10:5'): categorical nearest dists ────────────
  `graph <- weight_streetnet(hampi)` produced messages.
  ── Failure ('test-dists.R:11:5'): dists ────────────────────────────────────────
  `graph <- weight_streetnet(hampi)` produced messages.
  ── Failure ('test-dists.R:79:5'): dists-pairwise ───────────────────────────────
  `graph <- weight_streetnet(hampi)` produced messages.
  ── Failure ('test-dists.R:328:5'): graph columns ───────────────────────────────
  `graph <- weight_streetnet(hampi)` produced messages.
  ── Failure ('test-dists.R:351:5'): graph columns ───────────────────────────────
  `graph <- weight_streetnet(hampi)` produced messages.
  ── Failure ('test-dists.R:358:5'): negative weights ────────────────────────────
  `graph <- weight_streetnet(hampi)` produced messages.
  ── Failure ('test-iso.R:17:5'): isodists ───────────────────────────────────────
  Expected `net <- weight_streetnet(hsc, wt_profile = "bicycle")` to run without any messages.
  ℹ Actually got a <simpleMessage> with text:
    Superclass process has cloneable=FALSE, but subclass r_process has cloneable=TRUE. A subclass cannot be cloneable when its superclass is not cloneable, so cloning will be disabled for r_process.
    
  ── Error ('test-iso.R:22:5'): isodists ─────────────────────────────────────────
  Error in `eval(code, test_env)`: object 'net' not found
  Backtrace:
      ▆
   1. └─base::sample(net$.vx0, size = npts) at test-iso.R:22:5

[mpadge]

r-lib/callr#284, but easy enough to fix here regardless by removing test expectations