R Under development (unstable) (2023-11-05 r85474 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> test_check("clustermq")
Loading required package: clustermq
* Option 'clustermq.scheduler' not set, defaulting to 'LOCAL'
--- see: https://mschubert.github.io/clustermq/articles/userguide.html#configuration
[ FAIL 0 | WARN 0 | SKIP 27 | PASS 67 ]

══ Skipped tests (27) ══════════════════════════════════════════════════════════
• FIXME (2): 'test-5-queue.r:84:5', 'test-5-queue.r:112:5'
• On CRAN (4): 'test-6-queue_impl.r:43:5', 'test-6-queue_impl.r:54:5',
  'test-6-queue_impl.r:65:5', 'test-7-ssh_proxy.r:101:5'
• On Windows (14): 'test-2-worker.r:112:5', 'test-2-worker.r:133:5',
  'test-4-pool.r:4:5', 'test-4-pool.r:30:5', 'test-5-queue.r:7:5',
  'test-5-queue.r:16:5', 'test-5-queue.r:25:5', 'test-5-queue.r:34:5',
  'test-5-queue.r:43:5', 'test-5-queue.r:53:5', 'test-5-queue.r:64:5',
  'test-5-queue.r:76:5', 'test-5-queue.r:129:5', 'test-6-queue_impl.r:24:5'
• https://github.com/r-lib/processx/issues/236 (3): 'test-4-pool.r:43:5',
  'test-4-pool.r:54:5', 'test-6-queue_impl.r:33:5'
• this works interactively but evaluates the error on testthat (1):
  'test-2-worker.r:91:5'
• using 1 worker: Error: Resource temporarily unavailable @m$recv (L63) (1):
  'test-7-ssh_proxy.r:53:5'
• using 2 workers: Assertion failed: check () (src/msg.cpp:414) on CI (1):
  'test-7-ssh_proxy.r:75:5'
• works interactively (1): 'test-4-pool.r:68:5'

[ FAIL 0 | WARN 0 | SKIP 27 | PASS 67 ]
> 
> proc.time()
   user  system elapsed 
   4.78    0.60    5.32