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  [09:21:21.811] Benchmark with 60 resampling iterations 
INFO  [09:21:21.969] Applying learner 'classif.featureless' on task 'spam' (iter 1/10) 
INFO  [09:21:22.042] Applying learner 'classif.featureless' on task 'spam' (iter 2/10) 
INFO  [09:21:22.087] Applying learner 'classif.featureless' on task 'spam' (iter 3/10) 
INFO  [09:21:22.131] Applying learner 'classif.featureless' on task 'spam' (iter 4/10) 
INFO  [09:21:22.175] Applying learner 'classif.featureless' on task 'spam' (iter 5/10) 
INFO  [09:21:22.219] Applying learner 'classif.featureless' on task 'spam' (iter 6/10) 
INFO  [09:21:22.263] Applying learner 'classif.featureless' on task 'spam' (iter 7/10) 
INFO  [09:21:22.306] Applying learner 'classif.featureless' on task 'spam' (iter 8/10) 
INFO  [09:21:22.355] Applying learner 'classif.featureless' on task 'spam' (iter 9/10) 
INFO  [09:21:22.398] Applying learner 'classif.featureless' on task 'spam' (iter 10/10) 
INFO  [09:21:22.441] Applying learner 'classif.rpart' on task 'spam' (iter 1/10) 
INFO  [09:21:23.045] Applying learner 'classif.rpart' on task 'spam' (iter 2/10) 
INFO  [09:21:23.590] Applying learner 'classif.rpart' on task 'spam' (iter 3/10) 
INFO  [09:21:24.143] Applying learner 'classif.rpart' on task 'spam' (iter 4/10) 
INFO  [09:21:24.703] Applying learner 'classif.rpart' on task 'spam' (iter 5/10) 
INFO  [09:21:25.209] Applying learner 'classif.rpart' on task 'spam' (iter 6/10) 
INFO  [09:21:25.783] Applying learner 'classif.rpart' on task 'spam' (iter 7/10) 
INFO  [09:21:26.155] Applying learner 'classif.rpart' on task 'spam' (iter 8/10) 
INFO  [09:21:26.295] Applying learner 'classif.rpart' on task 'spam' (iter 9/10) 
INFO  [09:21:26.956] Applying learner 'classif.rpart' on task 'spam' (iter 10/10) 
INFO  [09:21:27.579] Applying learner 'classif.featureless' on task 'pima' (iter 1/10) 
INFO  [09:21:27.602] Applying learner 'classif.featureless' on task 'pima' (iter 2/10) 
INFO  [09:21:27.622] Applying learner 'classif.featureless' on task 'pima' (iter 3/10) 
INFO  [09:21:27.643] Applying learner 'classif.featureless' on task 'pima' (iter 4/10) 
INFO  [09:21:27.679] Applying learner 'classif.featureless' on task 'pima' (iter 5/10) 
INFO  [09:21:27.710] Applying learner 'classif.featureless' on task 'pima' (iter 6/10) 
INFO  [09:21:27.730] Applying learner 'classif.featureless' on task 'pima' (iter 7/10) 
INFO  [09:21:27.750] Applying learner 'classif.featureless' on task 'pima' (iter 8/10) 
INFO  [09:21:27.769] Applying learner 'classif.featureless' on task 'pima' (iter 9/10) 
INFO  [09:21:27.787] Applying learner 'classif.featureless' on task 'pima' (iter 10/10) 
INFO  [09:21:27.805] Applying learner 'classif.rpart' on task 'pima' (iter 1/10) 
INFO  [09:21:27.841] Applying learner 'classif.rpart' on task 'pima' (iter 2/10) 
INFO  [09:21:27.931] Applying learner 'classif.rpart' on task 'pima' (iter 3/10) 
INFO  [09:21:27.971] Applying learner 'classif.rpart' on task 'pima' (iter 4/10) 
INFO  [09:21:28.004] Applying learner 'classif.rpart' on task 'pima' (iter 5/10) 
INFO  [09:21:28.037] Applying learner 'classif.rpart' on task 'pima' (iter 6/10) 
INFO  [09:21:28.108] Applying learner 'classif.rpart' on task 'pima' (iter 7/10) 
INFO  [09:21:28.143] Applying learner 'classif.rpart' on task 'pima' (iter 8/10) 
INFO  [09:21:28.178] Applying learner 'classif.rpart' on task 'pima' (iter 9/10) 
INFO  [09:21:28.212] Applying learner 'classif.rpart' on task 'pima' (iter 10/10) 
INFO  [09:21:28.247] Applying learner 'classif.featureless' on task 'sonar' (iter 1/10) 
INFO  [09:21:28.266] Applying learner 'classif.featureless' on task 'sonar' (iter 2/10) 
INFO  [09:21:28.292] Applying learner 'classif.featureless' on task 'sonar' (iter 3/10) 
INFO  [09:21:28.311] Applying learner 'classif.featureless' on task 'sonar' (iter 4/10) 
INFO  [09:21:28.330] Applying learner 'classif.featureless' on task 'sonar' (iter 5/10) 
INFO  [09:21:28.349] Applying learner 'classif.featureless' on task 'sonar' (iter 6/10) 
INFO  [09:21:28.368] Applying learner 'classif.featureless' on task 'sonar' (iter 7/10) 
INFO  [09:21:28.388] Applying learner 'classif.featureless' on task 'sonar' (iter 8/10) 
INFO  [09:21:28.407] Applying learner 'classif.featureless' on task 'sonar' (iter 9/10) 
INFO  [09:21:28.427] Applying learner 'classif.featureless' on task 'sonar' (iter 10/10) 
INFO  [09:21:28.452] Applying learner 'classif.rpart' on task 'sonar' (iter 1/10) 
INFO  [09:21:28.508] Applying learner 'classif.rpart' on task 'sonar' (iter 2/10) 
INFO  [09:21:28.564] Applying learner 'classif.rpart' on task 'sonar' (iter 3/10) 
INFO  [09:21:28.671] Applying learner 'classif.rpart' on task 'sonar' (iter 4/10) 
INFO  [09:21:28.726] Applying learner 'classif.rpart' on task 'sonar' (iter 5/10) 
INFO  [09:21:28.788] Applying learner 'classif.rpart' on task 'sonar' (iter 6/10) 
INFO  [09:21:28.846] Applying learner 'classif.rpart' on task 'sonar' (iter 7/10) 
INFO  [09:21:28.902] Applying learner 'classif.rpart' on task 'sonar' (iter 8/10) 
INFO  [09:21:28.963] Applying learner 'classif.rpart' on task 'sonar' (iter 9/10) 
INFO  [09:21:29.019] Applying learner 'classif.rpart' on task 'sonar' (iter 10/10) 
INFO  [09:21:29.081] Finished benchmark 
> 
> head(fortify(object))
Error: $ operator is invalid for atomic vectors
Execution halted