The feature names of the task are written to the state of the learner in $.train() but the state is not exported from the callr session. Only the fitted model is sent back the main R session. Predicting fails because learner$state$feature_names is empty.
mllg
commented
2 years ago
The feature names of the task are written to the state of the learner in
$.train()but the state is not exported from thecallrsession. Only the fitted model is sent back the main R session. Predicting fails becauselearner$state$feature_namesis empty.https://github.com/mlr-org/mlr3learners/blob/fe8d03fadf2900224c9af0dbe236207291ed9d32/R/LearnerClassifSVM.R#L79