R Under development (unstable) (2024-10-17 r87242 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  [12:09:51.282] [mlr3] train: Warning from classif.debug->train()
ERROR [12:09:51.308] [mlr3] train: Error from classif.debug->train()
WARN  [12:09:51.395] [mlr3] predict: Warning from classif.debug->predict()
ERROR [12:09:51.449] [mlr3] predict: Error from classif.debug->predict()
WARN  [12:09:51.561] [mlr3] train: Warning from classif.debug->train()
WARN  [12:09:51.608] [mlr3] train: Warning from classif.debug->train()
WARN  [12:09:51.652] [mlr3] train: Warning from classif.debug->train()
WARN  [12:09:51.739] [mlr3] train: Warning from classif.debug->train()
ERROR [12:09:51.760] [mlr3] predict: Error from classif.debug->predict()
WARN  [12:09:51.806] [mlr3] train: Warning from classif.debug->train()
ERROR [12:09:51.826] [mlr3] predict: Error from classif.debug->predict()
WARN  [12:09:51.868] [mlr3] train: Warning from classif.debug->train()
ERROR [12:09:51.889] [mlr3] predict: Error from classif.debug->predict()
WARN  [12:09:52.020] [mlr3] train: Warning from classif.debug->train()
WARN  [12:09:52.063] [mlr3] train: Warning from classif.debug->train()
WARN  [12:09:52.101] [mlr3] train: Warning from classif.debug->train()
WARN  [12:09:52.230] [mlr3] train: Warning from classif.debug->train()
ERROR [12:09:52.249] [mlr3] predict: Error from classif.debug->predict()
WARN  [12:09:52.283] [mlr3] train: Warning from classif.debug->train()
ERROR [12:09:52.304] [mlr3] predict: Error from classif.debug->predict()
WARN  [12:09:52.344] [mlr3] train: Warning from classif.debug->train()
ERROR [12:09:52.364] [mlr3] predict: Error from classif.debug->predict()
ERROR [12:09:53.573] [mlr3] train: Error from classif.debug->train()
ERROR [12:09:53.699] [mlr3] predict: Error from classif.debug->predict()
ERROR [12:09:53.879] [mlr3] predict: Error from classif.debug->predict()
ERROR [12:09:53.929] [mlr3] predict: Error from classif.debug->predict()
ERROR [12:09:53.978] [mlr3] predict: Error from classif.debug->predict()
ERROR [12:10:50.223] [mlr3] train: Error from classif.debug->train()
[ FAIL 0 | WARN 6 | SKIP 5 | PASS 13605 ]

══ 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 6 | SKIP 5 | PASS 13605 ]
> 
> proc.time()
   user  system elapsed 
 124.75   12.92  242.68