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  [22:59:13.491] Benchmark with 60 resampling iterations 
INFO  [22:59:13.634] Applying learner 'classif.featureless' on task 'spam' (iter 1/10) 
INFO  [22:59:13.699] Applying learner 'classif.featureless' on task 'spam' (iter 2/10) 
INFO  [22:59:13.734] Applying learner 'classif.featureless' on task 'spam' (iter 3/10) 
INFO  [22:59:13.783] Applying learner 'classif.featureless' on task 'spam' (iter 4/10) 
INFO  [22:59:13.823] Applying learner 'classif.featureless' on task 'spam' (iter 5/10) 
INFO  [22:59:13.860] Applying learner 'classif.featureless' on task 'spam' (iter 6/10) 
INFO  [22:59:13.896] Applying learner 'classif.featureless' on task 'spam' (iter 7/10) 
INFO  [22:59:13.931] Applying learner 'classif.featureless' on task 'spam' (iter 8/10) 
INFO  [22:59:13.962] Applying learner 'classif.featureless' on task 'spam' (iter 9/10) 
INFO  [22:59:14.061] Applying learner 'classif.featureless' on task 'spam' (iter 10/10) 
INFO  [22:59:14.121] Applying learner 'classif.rpart' on task 'spam' (iter 1/10) 
INFO  [22:59:14.761] Applying learner 'classif.rpart' on task 'spam' (iter 2/10) 
INFO  [22:59:14.965] Applying learner 'classif.rpart' on task 'spam' (iter 3/10) 
INFO  [22:59:15.441] Applying learner 'classif.rpart' on task 'spam' (iter 4/10) 
INFO  [22:59:15.943] Applying learner 'classif.rpart' on task 'spam' (iter 5/10) 
INFO  [22:59:16.474] Applying learner 'classif.rpart' on task 'spam' (iter 6/10) 
INFO  [22:59:16.931] Applying learner 'classif.rpart' on task 'spam' (iter 7/10) 
INFO  [22:59:17.448] Applying learner 'classif.rpart' on task 'spam' (iter 8/10) 
INFO  [22:59:17.973] Applying learner 'classif.rpart' on task 'spam' (iter 9/10) 
INFO  [22:59:18.544] Applying learner 'classif.rpart' on task 'spam' (iter 10/10) 
INFO  [22:59:19.127] Applying learner 'classif.featureless' on task 'pima' (iter 1/10) 
INFO  [22:59:19.158] Applying learner 'classif.featureless' on task 'pima' (iter 2/10) 
INFO  [22:59:19.190] Applying learner 'classif.featureless' on task 'pima' (iter 3/10) 
INFO  [22:59:19.221] Applying learner 'classif.featureless' on task 'pima' (iter 4/10) 
INFO  [22:59:19.252] Applying learner 'classif.featureless' on task 'pima' (iter 5/10) 
INFO  [22:59:19.283] Applying learner 'classif.featureless' on task 'pima' (iter 6/10) 
INFO  [22:59:19.314] Applying learner 'classif.featureless' on task 'pima' (iter 7/10) 
INFO  [22:59:19.345] Applying learner 'classif.featureless' on task 'pima' (iter 8/10) 
INFO  [22:59:19.381] Applying learner 'classif.featureless' on task 'pima' (iter 9/10) 
INFO  [22:59:19.412] Applying learner 'classif.featureless' on task 'pima' (iter 10/10) 
INFO  [22:59:19.444] Applying learner 'classif.rpart' on task 'pima' (iter 1/10) 
INFO  [22:59:19.485] Applying learner 'classif.rpart' on task 'pima' (iter 2/10) 
INFO  [22:59:19.547] Applying learner 'classif.rpart' on task 'pima' (iter 3/10) 
INFO  [22:59:19.605] Applying learner 'classif.rpart' on task 'pima' (iter 4/10) 
INFO  [22:59:19.668] Applying learner 'classif.rpart' on task 'pima' (iter 5/10) 
INFO  [22:59:19.713] Applying learner 'classif.rpart' on task 'pima' (iter 6/10) 
INFO  [22:59:19.741] Applying learner 'classif.rpart' on task 'pima' (iter 7/10) 
INFO  [22:59:19.843] Applying learner 'classif.rpart' on task 'pima' (iter 8/10) 
INFO  [22:59:19.979] Applying learner 'classif.rpart' on task 'pima' (iter 9/10) 
INFO  [22:59:20.038] Applying learner 'classif.rpart' on task 'pima' (iter 10/10) 
INFO  [22:59:20.092] Applying learner 'classif.featureless' on task 'sonar' (iter 1/10) 
INFO  [22:59:20.119] Applying learner 'classif.featureless' on task 'sonar' (iter 2/10) 
INFO  [22:59:20.134] Applying learner 'classif.featureless' on task 'sonar' (iter 3/10) 
INFO  [22:59:20.164] Applying learner 'classif.featureless' on task 'sonar' (iter 4/10) 
INFO  [22:59:20.199] Applying learner 'classif.featureless' on task 'sonar' (iter 5/10) 
INFO  [22:59:20.256] Applying learner 'classif.featureless' on task 'sonar' (iter 6/10) 
INFO  [22:59:20.270] Applying learner 'classif.featureless' on task 'sonar' (iter 7/10) 
INFO  [22:59:20.310] Applying learner 'classif.featureless' on task 'sonar' (iter 8/10) 
INFO  [22:59:20.324] Applying learner 'classif.featureless' on task 'sonar' (iter 9/10) 
INFO  [22:59:20.339] Applying learner 'classif.featureless' on task 'sonar' (iter 10/10) 
INFO  [22:59:20.353] Applying learner 'classif.rpart' on task 'sonar' (iter 1/10) 
INFO  [22:59:20.408] Applying learner 'classif.rpart' on task 'sonar' (iter 2/10) 
INFO  [22:59:20.449] Applying learner 'classif.rpart' on task 'sonar' (iter 3/10) 
INFO  [22:59:20.487] Applying learner 'classif.rpart' on task 'sonar' (iter 4/10) 
INFO  [22:59:20.532] Applying learner 'classif.rpart' on task 'sonar' (iter 5/10) 
INFO  [22:59:20.572] Applying learner 'classif.rpart' on task 'sonar' (iter 6/10) 
INFO  [22:59:20.617] Applying learner 'classif.rpart' on task 'sonar' (iter 7/10) 
INFO  [22:59:20.657] Applying learner 'classif.rpart' on task 'sonar' (iter 8/10) 
INFO  [22:59:20.695] Applying learner 'classif.rpart' on task 'sonar' (iter 9/10) 
INFO  [22:59:20.746] Applying learner 'classif.rpart' on task 'sonar' (iter 10/10) 
INFO  [22:59:20.834] Finished benchmark 
> 
> head(fortify(object))
Error: $ operator is invalid for atomic vectors
Execution halted