R Under development (unstable) (2024-09-23 r87189 ucrt) -- "Unsuffered Consequences"
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> if (requireNamespace("testthat", quietly = TRUE)) {
+   library(testthat)
+   library(mlr3mbo)
+   test_check("mlr3mbo")
+ }
Loading required namespace: mlr3learners
Loading required namespace: DiceKriging
Loading required namespace: rgenoud
Loading required package: mlr3
WARN  [12:23:09.350] [bbotk] Optimizer Error.
WARN  [12:23:32.485] [bbotk] Less then `n_select` (1) candidate points found during acquisition function optimization were not already evaluated.
WARN  [12:24:16.326] [bbotk] Task 'surrogate_task' has missing values in column(s) 'y_scal', but learner 'regr.km' does not support this
WARN  [12:24:16.328] [bbotk] Could not update the surrogate a final time after the optimization process has terminated.
WARN  [12:24:35.470] [bbotk] Task 'surrogate_task' has missing values in column(s) 'y_scal', but learner 'regr.km' does not support this
WARN  [12:24:35.472] [bbotk] Could not update the surrogate a final time after the optimization process has terminated.
WARN  [12:24:47.478] [bbotk] Surrogate Train Error.
WARN  [12:24:56.256] [bbotk] Current insample performance of the Surrogate Model does not meet the performance threshold.
WARN  [12:25:01.392] [bbotk] Surrogate Train Error.
WARN  [12:25:17.551] [bbotk] Current insample performance of the Surrogate Model does not meet the performance threshold.
WARN  [12:25:19.004] [mlr3] train: NAs produced
ERROR [12:25:19.006] [mlr3] train: the leading minor of order 1 is not positive
WARN  [12:25:57.217] [bbotk] Current insample performance of the Surrogate Model does not meet the performance threshold.
WARN  [12:26:00.521] [bbotk] Optimizer Error.
WARN  [12:26:00.817] [bbotk] Surrogate Train Error.
WARN  [12:26:01.142] [bbotk] Surrogate Predict Error.
ERROR [12:26:50.666] [mlr3] train: Surrogate Train Error.
[ FAIL 0 | WARN 0 | SKIP 4 | PASS 1033 ]

══ Skipped tests (4) ═══════════════════════════════════════════════════════════
• On CRAN (4): 'test_AcqFunctionEHVIGH.R:35:3', 'test_OptimizerMbo.R:2:3',
  'test_ResultAssignerSurrogate.R:16:3', 'test_TunerMbo.R:2:3'

[ FAIL 0 | WARN 0 | SKIP 4 | PASS 1033 ]
> 
> proc.time()
   user  system elapsed 
  68.01    4.89  289.70