R Under development (unstable) (2024-04-23 r86473 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> if (requireNamespace("testthat", quietly = TRUE)) {
+   library("checkmate")
+   library("testthat")
+   library("mlr3")
+   test_check("mlr3")
+ }
Loading required namespace: Matrix
ERROR [17:33:13.286] [mlr3] predict: Error from classif.debug->predict()
ERROR [17:33:37.220] [mlr3] train: Error from classif.debug->train()
ERROR [17:33:37.253] [mlr3] train: Error from classif.debug->train()
ERROR [17:33:37.277] [mlr3] train: Error from classif.debug->train()
ERROR [17:33:37.375] [mlr3] train: Error from classif.debug->train()
ERROR [17:33:37.424] [mlr3] train: Error from classif.debug->train()
ERROR [17:33:37.467] [mlr3] train: Error from classif.debug->train()
ERROR [17:33:37.698] [mlr3] train: Error from classif.debug->train()
ERROR [17:33:37.733] [mlr3] train: Error from classif.debug->train()
ERROR [17:33:37.769] [mlr3] train: Error from classif.debug->train()
WARN  [17:33:58.301] [mlr3] train: Warning from classif.debug->train()
ERROR [17:33:58.317] [mlr3] train: Error from classif.debug->train()
WARN  [17:33:58.352] [mlr3] predict: Warning from classif.debug->predict()
ERROR [17:33:58.392] [mlr3] predict: Error from classif.debug->predict()
WARN  [17:33:58.512] [mlr3] train: Warning from classif.debug->train()
WARN  [17:33:58.535] [mlr3] train: Warning from classif.debug->train()
WARN  [17:33:58.560] [mlr3] train: Warning from classif.debug->train()
WARN  [17:33:58.651] [mlr3] train: Warning from classif.debug->train()
ERROR [17:33:58.660] [mlr3] predict: Error from classif.debug->predict()
WARN  [17:33:58.682] [mlr3] train: Warning from classif.debug->train()
ERROR [17:33:58.688] [mlr3] predict: Error from classif.debug->predict()
WARN  [17:33:58.706] [mlr3] train: Warning from classif.debug->train()
ERROR [17:33:58.714] [mlr3] predict: Error from classif.debug->predict()
WARN  [17:33:58.938] [mlr3] train: Warning from classif.debug->train()
WARN  [17:33:58.963] [mlr3] train: Warning from classif.debug->train()
WARN  [17:33:58.982] [mlr3] train: Warning from classif.debug->train()
WARN  [17:33:59.084] [mlr3] train: Warning from classif.debug->train()
ERROR [17:33:59.089] [mlr3] predict: Error from classif.debug->predict()
WARN  [17:33:59.104] [mlr3] train: Warning from classif.debug->train()
ERROR [17:33:59.112] [mlr3] predict: Error from classif.debug->predict()
WARN  [17:33:59.127] [mlr3] train: Warning from classif.debug->train()
ERROR [17:33:59.132] [mlr3] predict: Error from classif.debug->predict()
ERROR [17:34:00.341] [mlr3] train: Error from classif.debug->train()
ERROR [17:34:00.482] [mlr3] predict: Error from classif.debug->predict()
ERROR [17:34:00.624] [mlr3] predict: Error from classif.debug->predict()
ERROR [17:34:00.662] [mlr3] predict: Error from classif.debug->predict()
ERROR [17:34:00.696] [mlr3] predict: Error from classif.debug->predict()
ERROR [17:34:57.484] [mlr3] train: Error from classif.debug->train()
[ FAIL 0 | WARN 0 | SKIP 4 | PASS 13164 ]

══ Skipped tests (4) ═══════════════════════════════════════════════════════════
• 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'

[ FAIL 0 | WARN 0 | SKIP 4 | PASS 13164 ]
> 
> proc.time()
   user  system elapsed 
 114.40    8.21  156.48