R Under development (unstable) (2024-09-18 r87177 ucrt) -- "Unsuffered Consequences"
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> if (requireNamespace("testthat", quietly = TRUE)) {
+   library("checkmate")
+   library("testthat")
+   library("mlr3")
+   test_check("mlr3")
+ }
Loading required namespace: Matrix
WARN  [18:23:02.837] [mlr3] train: Warning from classif.debug->train()
ERROR [18:23:02.856] [mlr3] train: Error from classif.debug->train()
WARN  [18:23:02.906] [mlr3] predict: Warning from classif.debug->predict()
ERROR [18:23:02.943] [mlr3] predict: Error from classif.debug->predict()
WARN  [18:23:03.007] [mlr3] train: Warning from classif.debug->train()
WARN  [18:23:03.032] [mlr3] train: Warning from classif.debug->train()
WARN  [18:23:03.057] [mlr3] train: Warning from classif.debug->train()
WARN  [18:23:03.108] [mlr3] train: Warning from classif.debug->train()
ERROR [18:23:03.120] [mlr3] predict: Error from classif.debug->predict()
WARN  [18:23:03.143] [mlr3] train: Warning from classif.debug->train()
ERROR [18:23:03.154] [mlr3] predict: Error from classif.debug->predict()
WARN  [18:23:03.183] [mlr3] train: Warning from classif.debug->train()
ERROR [18:23:03.195] [mlr3] predict: Error from classif.debug->predict()
WARN  [18:23:03.293] [mlr3] train: Warning from classif.debug->train()
WARN  [18:23:03.323] [mlr3] train: Warning from classif.debug->train()
WARN  [18:23:03.352] [mlr3] train: Warning from classif.debug->train()
WARN  [18:23:03.456] [mlr3] train: Warning from classif.debug->train()
ERROR [18:23:03.472] [mlr3] predict: Error from classif.debug->predict()
WARN  [18:23:03.499] [mlr3] train: Warning from classif.debug->train()
ERROR [18:23:03.525] [mlr3] predict: Error from classif.debug->predict()
WARN  [18:23:03.567] [mlr3] train: Warning from classif.debug->train()
ERROR [18:23:03.581] [mlr3] predict: Error from classif.debug->predict()
ERROR [18:23:04.593] [mlr3] train: Error from classif.debug->train()
ERROR [18:23:04.707] [mlr3] predict: Error from classif.debug->predict()
ERROR [18:23:04.821] [mlr3] predict: Error from classif.debug->predict()
ERROR [18:23:04.873] [mlr3] predict: Error from classif.debug->predict()
ERROR [18:23:04.907] [mlr3] predict: Error from classif.debug->predict()
ERROR [18:23:40.793] [mlr3] train: Error from classif.debug->train()
[ FAIL 0 | WARN 0 | SKIP 5 | PASS 13604 ]

══ Skipped tests (5) ═══════════════════════════════════════════════════════════
• On CRAN (2): 'test_Measure.R:128:3', 'test_parallel.R:91:3'
• On Windows (1): 'test_parallel.R:62:3'
• distr6 cannot be loaded (1): 'test_PredictionRegr.R:54:3'
• empty test (1): 'test_resample.R:375:1'

[ FAIL 0 | WARN 0 | SKIP 5 | PASS 13604 ]
> 
> proc.time()
   user  system elapsed 
  79.20    6.71  149.57