Test failure on R-devel

[pat-s]

https://github.com/mlr-org/mlrMBO/runs/1811975893?check_suite_focus=true#step:16:280

Can reproduce locally.

@jakob-r

[pat-s]

@jakob-r @mb706

R 4.1 is not that far anymore. Does anyone have some time to look at this?

[jakob-r]

Thanks for pining. I will have a look.

[jakob-r]

Looking at the traceback. I am pretty sure this problem is in mlr.