surv.blackboost breaks when predicting on one data point

[hbaniecki]

Description

I tried to debug it, and the actual error occurred in this line
https://github.com/mlr-org/mlr3/blob/435c9d13fae39ef3f3f6cf40cbfae6fc9d19a039/R/worker.R#L175-L182

Possibly connected with mlr3extralearners, mboost.

Reproducible example

library(mlr3proba)
#> Loading required package: mlr3
#> Warning: package 'mlr3' was built under R version 4.2.2
library(mlr3extralearners)
library(survival)
task_veteran <- as_task_surv(veteran, time = "time", event = "status", type = "right")
learner_ranger <- lrn("surv.blackboost")
learner_ranger$train(task_veteran)
learner_ranger$predict_newdata(veteran[1, -c(3, 4)])
#> Error in `colnames<-`(`*tmp*`, value = rownames(newdata)): attempt to set 'colnames' on an object with less than two dimensions

^{Created on 2023-01-13 with reprex v2.0.2}

Session info

sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#>  setting  value
#>  version  R version 4.2.1 (2022-06-23 ucrt)
#>  os       Windows 10 x64 (build 19044)
#>  system   x86_64, mingw32
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#>  language (EN)
#>  collate  English_United Kingdom.utf8
#>  ctype    English_United Kingdom.utf8
#>  tz       Europe/Warsaw
#>  date     2023-01-13
#>  pandoc   2.19.2 @ C:/Program Files/RStudio/bin/quarto/bin/tools/ (via rmarkdown)
#> 
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#> ──────────────────────────────────────────────────────────────────────────────

[hbaniecki]

Found the origin of the problem, and it's solved via boost-R/mboost#118

[RaphaelS1]

Thanks I'm closing then