Running examples in ‘mlr3viz-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: autoplot.BenchmarkResult
> ### Title: Plot for BenchmarkResult
> ### Aliases: autoplot.BenchmarkResult
> 
> ### ** Examples
> 
> library(mlr3)
> library(mlr3viz)
> 
> tasks = tsks(c("spam", "pima", "sonar"))
> learner = lrns(c("classif.featureless", "classif.rpart"),
+   predict_type = "prob")
> resampling = rsmps("cv")
> object = benchmark(benchmark_grid(tasks, learner, resampling))
INFO  [09:36:27.168] Benchmark with 60 resampling iterations 
INFO  [09:36:27.362] Applying learner 'classif.featureless' on task 'spam' (iter 1/10) 
INFO  [09:36:27.432] Applying learner 'classif.featureless' on task 'spam' (iter 2/10) 
INFO  [09:36:27.474] Applying learner 'classif.featureless' on task 'spam' (iter 3/10) 
INFO  [09:36:27.516] Applying learner 'classif.featureless' on task 'spam' (iter 4/10) 
INFO  [09:36:27.561] Applying learner 'classif.featureless' on task 'spam' (iter 5/10) 
INFO  [09:36:27.597] Applying learner 'classif.featureless' on task 'spam' (iter 6/10) 
INFO  [09:36:27.654] Applying learner 'classif.featureless' on task 'spam' (iter 7/10) 
INFO  [09:36:27.695] Applying learner 'classif.featureless' on task 'spam' (iter 8/10) 
INFO  [09:36:27.742] Applying learner 'classif.featureless' on task 'spam' (iter 9/10) 
INFO  [09:36:27.783] Applying learner 'classif.featureless' on task 'spam' (iter 10/10) 
INFO  [09:36:27.824] Applying learner 'classif.rpart' on task 'spam' (iter 1/10) 
INFO  [09:36:28.322] Applying learner 'classif.rpart' on task 'spam' (iter 2/10) 
INFO  [09:36:28.860] Applying learner 'classif.rpart' on task 'spam' (iter 3/10) 
INFO  [09:36:29.272] Applying learner 'classif.rpart' on task 'spam' (iter 4/10) 
INFO  [09:36:29.479] Applying learner 'classif.rpart' on task 'spam' (iter 5/10) 
INFO  [09:36:29.797] Applying learner 'classif.rpart' on task 'spam' (iter 6/10) 
INFO  [09:36:29.932] Applying learner 'classif.rpart' on task 'spam' (iter 7/10) 
INFO  [09:36:30.585] Applying learner 'classif.rpart' on task 'spam' (iter 8/10) 
INFO  [09:36:30.799] Applying learner 'classif.rpart' on task 'spam' (iter 9/10) 
INFO  [09:36:31.332] Applying learner 'classif.rpart' on task 'spam' (iter 10/10) 
INFO  [09:36:31.855] Applying learner 'classif.featureless' on task 'pima' (iter 1/10) 
INFO  [09:36:31.874] Applying learner 'classif.featureless' on task 'pima' (iter 2/10) 
INFO  [09:36:31.892] Applying learner 'classif.featureless' on task 'pima' (iter 3/10) 
INFO  [09:36:31.911] Applying learner 'classif.featureless' on task 'pima' (iter 4/10) 
INFO  [09:36:31.930] Applying learner 'classif.featureless' on task 'pima' (iter 5/10) 
INFO  [09:36:31.955] Applying learner 'classif.featureless' on task 'pima' (iter 6/10) 
INFO  [09:36:31.974] Applying learner 'classif.featureless' on task 'pima' (iter 7/10) 
INFO  [09:36:31.992] Applying learner 'classif.featureless' on task 'pima' (iter 8/10) 
INFO  [09:36:32.010] Applying learner 'classif.featureless' on task 'pima' (iter 9/10) 
INFO  [09:36:32.028] Applying learner 'classif.featureless' on task 'pima' (iter 10/10) 
INFO  [09:36:32.047] Applying learner 'classif.rpart' on task 'pima' (iter 1/10) 
INFO  [09:36:32.081] Applying learner 'classif.rpart' on task 'pima' (iter 2/10) 
INFO  [09:36:32.123] Applying learner 'classif.rpart' on task 'pima' (iter 3/10) 
INFO  [09:36:32.158] Applying learner 'classif.rpart' on task 'pima' (iter 4/10) 
INFO  [09:36:32.193] Applying learner 'classif.rpart' on task 'pima' (iter 5/10) 
INFO  [09:36:32.227] Applying learner 'classif.rpart' on task 'pima' (iter 6/10) 
INFO  [09:36:32.300] Applying learner 'classif.rpart' on task 'pima' (iter 7/10) 
INFO  [09:36:32.339] Applying learner 'classif.rpart' on task 'pima' (iter 8/10) 
INFO  [09:36:32.375] Applying learner 'classif.rpart' on task 'pima' (iter 9/10) 
INFO  [09:36:32.408] Applying learner 'classif.rpart' on task 'pima' (iter 10/10) 
INFO  [09:36:32.453] Applying learner 'classif.featureless' on task 'sonar' (iter 1/10) 
INFO  [09:36:32.473] Applying learner 'classif.featureless' on task 'sonar' (iter 2/10) 
INFO  [09:36:32.507] Applying learner 'classif.featureless' on task 'sonar' (iter 3/10) 
INFO  [09:36:32.528] Applying learner 'classif.featureless' on task 'sonar' (iter 4/10) 
INFO  [09:36:32.549] Applying learner 'classif.featureless' on task 'sonar' (iter 5/10) 
INFO  [09:36:32.569] Applying learner 'classif.featureless' on task 'sonar' (iter 6/10) 
INFO  [09:36:32.588] Applying learner 'classif.featureless' on task 'sonar' (iter 7/10) 
INFO  [09:36:32.608] Applying learner 'classif.featureless' on task 'sonar' (iter 8/10) 
INFO  [09:36:32.628] Applying learner 'classif.featureless' on task 'sonar' (iter 9/10) 
INFO  [09:36:32.648] Applying learner 'classif.featureless' on task 'sonar' (iter 10/10) 
INFO  [09:36:32.673] Applying learner 'classif.rpart' on task 'sonar' (iter 1/10) 
INFO  [09:36:32.729] Applying learner 'classif.rpart' on task 'sonar' (iter 2/10) 
INFO  [09:36:32.785] Applying learner 'classif.rpart' on task 'sonar' (iter 3/10) 
INFO  [09:36:32.847] Applying learner 'classif.rpart' on task 'sonar' (iter 4/10) 
INFO  [09:36:32.902] Applying learner 'classif.rpart' on task 'sonar' (iter 5/10) 
INFO  [09:36:32.963] Applying learner 'classif.rpart' on task 'sonar' (iter 6/10) 
INFO  [09:36:33.022] Applying learner 'classif.rpart' on task 'sonar' (iter 7/10) 
INFO  [09:36:33.081] Applying learner 'classif.rpart' on task 'sonar' (iter 8/10) 
INFO  [09:36:33.144] Applying learner 'classif.rpart' on task 'sonar' (iter 9/10) 
INFO  [09:36:33.201] Applying learner 'classif.rpart' on task 'sonar' (iter 10/10) 
INFO  [09:36:33.260] Finished benchmark 
> 
> head(fortify(object))
Error: $ operator is invalid for atomic vectors
Execution halted