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

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: autoplot.BenchmarkResult
> ### Title: Plots for Benchmark Results
> ### Aliases: autoplot.BenchmarkResult
> 
> ### ** Examples
> 
> if (requireNamespace("mlr3")) {
+   library(mlr3)
+   library(mlr3viz)
+ 
+   tasks = tsks(c("pima", "sonar"))
+   learner = lrns(c("classif.featureless", "classif.rpart"),
+     predict_type = "prob")
+   resampling = rsmps("cv")
+   object = benchmark(benchmark_grid(tasks, learner, resampling))
+ 
+   head(fortify(object))
+   autoplot(object)
+   autoplot(object$clone(deep = TRUE)$filter(task_ids = "pima"), type = "roc")
+ }
Loading required namespace: mlr3
INFO  [17:15:47.006] [mlr3] Running benchmark with 40 resampling iterations
INFO  [17:15:47.132] [mlr3] Applying learner 'classif.featureless' on task 'pima' (iter 1/10)
INFO  [17:15:47.229] [mlr3] Applying learner 'classif.featureless' on task 'pima' (iter 2/10)
INFO  [17:15:47.284] [mlr3] Applying learner 'classif.featureless' on task 'pima' (iter 3/10)
INFO  [17:15:47.371] [mlr3] Applying learner 'classif.featureless' on task 'pima' (iter 4/10)
INFO  [17:15:47.511] [mlr3] Applying learner 'classif.featureless' on task 'pima' (iter 5/10)
INFO  [17:15:47.556] [mlr3] Applying learner 'classif.featureless' on task 'pima' (iter 6/10)
INFO  [17:15:47.632] [mlr3] Applying learner 'classif.featureless' on task 'pima' (iter 7/10)
INFO  [17:15:47.801] [mlr3] Applying learner 'classif.featureless' on task 'pima' (iter 8/10)
INFO  [17:15:47.895] [mlr3] Applying learner 'classif.featureless' on task 'pima' (iter 9/10)
INFO  [17:15:47.972] [mlr3] Applying learner 'classif.featureless' on task 'pima' (iter 10/10)
INFO  [17:15:48.047] [mlr3] Applying learner 'classif.rpart' on task 'pima' (iter 1/10)
INFO  [17:15:48.104] [mlr3] Applying learner 'classif.rpart' on task 'pima' (iter 2/10)
INFO  [17:15:48.139] [mlr3] Applying learner 'classif.rpart' on task 'pima' (iter 3/10)
INFO  [17:15:48.222] [mlr3] Applying learner 'classif.rpart' on task 'pima' (iter 4/10)
INFO  [17:15:48.293] [mlr3] Applying learner 'classif.rpart' on task 'pima' (iter 5/10)
INFO  [17:15:48.342] [mlr3] Applying learner 'classif.rpart' on task 'pima' (iter 6/10)
INFO  [17:15:48.431] [mlr3] Applying learner 'classif.rpart' on task 'pima' (iter 7/10)
INFO  [17:15:48.482] [mlr3] Applying learner 'classif.rpart' on task 'pima' (iter 8/10)
INFO  [17:15:48.678] [mlr3] Applying learner 'classif.rpart' on task 'pima' (iter 9/10)
INFO  [17:15:48.703] [mlr3] Applying learner 'classif.rpart' on task 'pima' (iter 10/10)
INFO  [17:15:48.729] [mlr3] Applying learner 'classif.featureless' on task 'sonar' (iter 1/10)
INFO  [17:15:48.754] [mlr3] Applying learner 'classif.featureless' on task 'sonar' (iter 2/10)
INFO  [17:15:48.793] [mlr3] Applying learner 'classif.featureless' on task 'sonar' (iter 3/10)
INFO  [17:15:48.834] [mlr3] Applying learner 'classif.featureless' on task 'sonar' (iter 4/10)
INFO  [17:15:48.905] [mlr3] Applying learner 'classif.featureless' on task 'sonar' (iter 5/10)
INFO  [17:15:48.977] [mlr3] Applying learner 'classif.featureless' on task 'sonar' (iter 6/10)
INFO  [17:15:49.048] [mlr3] Applying learner 'classif.featureless' on task 'sonar' (iter 7/10)
INFO  [17:15:49.125] [mlr3] Applying learner 'classif.featureless' on task 'sonar' (iter 8/10)
INFO  [17:15:49.204] [mlr3] Applying learner 'classif.featureless' on task 'sonar' (iter 9/10)
INFO  [17:15:49.267] [mlr3] Applying learner 'classif.featureless' on task 'sonar' (iter 10/10)
INFO  [17:15:49.311] [mlr3] Applying learner 'classif.rpart' on task 'sonar' (iter 1/10)
INFO  [17:15:49.357] [mlr3] Applying learner 'classif.rpart' on task 'sonar' (iter 2/10)
INFO  [17:15:49.415] [mlr3] Applying learner 'classif.rpart' on task 'sonar' (iter 3/10)
INFO  [17:15:49.498] [mlr3] Applying learner 'classif.rpart' on task 'sonar' (iter 4/10)
INFO  [17:15:49.582] [mlr3] Applying learner 'classif.rpart' on task 'sonar' (iter 5/10)
INFO  [17:15:49.673] [mlr3] Applying learner 'classif.rpart' on task 'sonar' (iter 6/10)
INFO  [17:15:49.722] [mlr3] Applying learner 'classif.rpart' on task 'sonar' (iter 7/10)
INFO  [17:15:49.764] [mlr3] Applying learner 'classif.rpart' on task 'sonar' (iter 8/10)
INFO  [17:15:49.815] [mlr3] Applying learner 'classif.rpart' on task 'sonar' (iter 9/10)
INFO  [17:15:49.875] [mlr3] Applying learner 'classif.rpart' on task 'sonar' (iter 10/10)
INFO  [17:15:49.938] [mlr3] Finished benchmark
Error in `[.data.table`(data, , `:=`("task_hash", task[[1L]]$hash), by = "uhash") : 
  attempt access index 9/9 in VECTOR_ELT
Calls: benchmark ... initialize -> .__ResultData__initialize -> [ -> [.data.table
Execution halted