* using log directory 'd:/Rcompile/CRANpkg/local/4.4/mlr3pipelines.Rcheck'
* using R version 4.4.3 (2025-02-28 ucrt)
* using platform: x86_64-w64-mingw32
* R was compiled by
    gcc.exe (GCC) 13.3.0
    GNU Fortran (GCC) 13.3.0
* running under: Windows Server 2022 x64 (build 20348)
* using session charset: UTF-8
* checking for file 'mlr3pipelines/DESCRIPTION' ... OK
* this is package 'mlr3pipelines' version '0.10.0'
* package encoding: UTF-8
* checking package namespace information ... OK
* checking package dependencies ... OK
* checking if this is a source package ... OK
* checking if there is a namespace ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking whether package 'mlr3pipelines' can be installed ... OK
* checking installed package size ... OK
* checking package directory ... OK
* checking 'build' directory ... OK
* checking DESCRIPTION meta-information ... OK
* checking top-level files ... OK
* checking for left-over files ... OK
* checking index information ... OK
* checking package subdirectories ... OK
* checking code files for non-ASCII characters ... OK
* checking R files for syntax errors ... OK
* checking whether the package can be loaded ... [1s] OK
* checking whether the package can be loaded with stated dependencies ... [1s] OK
* checking whether the package can be unloaded cleanly ... [1s] OK
* checking whether the namespace can be loaded with stated dependencies ... [1s] OK
* checking whether the namespace can be unloaded cleanly ... [1s] OK
* checking loading without being on the library search path ... [1s] OK
* checking whether startup messages can be suppressed ... [1s] OK
* checking use of S3 registration ... OK
* checking dependencies in R code ... OK
* checking S3 generic/method consistency ... OK
* checking replacement functions ... OK
* checking foreign function calls ... OK
* checking R code for possible problems ... [84s] OK
* checking Rd files ... [8s] OK
* checking Rd metadata ... OK
* checking Rd cross-references ... OK
* checking for missing documentation entries ... OK
* checking for code/documentation mismatches ... OK
* checking Rd \usage sections ... OK
* checking Rd contents ... OK
* checking for unstated dependencies in examples ... OK
* checking installed files from 'inst/doc' ... OK
* checking files in 'vignettes' ... OK
* checking examples ... [68s] ERROR
Running examples in 'mlr3pipelines-Ex.R' failed
The error most likely occurred in:

> ### Name: mlr_pipeops_nmf
> ### Title: Non-negative Matrix Factorization
> ### Aliases: mlr_pipeops_nmf PipeOpNMF
> 
> ### ** Examples
> 
> ## Don't show: 
> if (mlr3misc::require_namespaces(c("NMF", "MASS"), quietly = TRUE)) withAutoprint({ # examplesIf
+ ## End(Don't show)
+ ## Don't show: 
+ # NMF attaches these packages to search path on load, #929
+ lapply(c("package:Biobase", "package:BiocGenerics", "package:generics"), detach, character.only = TRUE)
+ ## End(Don't show)
+ library("mlr3")
+ 
+ task = tsk("iris")
+ pop = po("nmf")
+ 
+ task$data()
+ pop$train(list(task))[[1]]$data()
+ 
+ pop$state
+ ## Don't show: 
+ # BiocGenerics overwrites printer for our tables mlr-org/mlr3#1112
+ # Necessary as detaching packages does not remove registered S3 methods
+ suppressWarnings(try(rm("format.list", envir = .BaseNamespaceEnv$.__S3MethodsTable__.), silent = TRUE))
+ ## End(Don't show)
+ ## Don't show: 
+ }) # examplesIf
> lapply(c("package:Biobase", "package:BiocGenerics", "package:generics"), 
+     detach, character.only = TRUE)
Error in FUN(X[[i]], ...) : invalid 'name' argument
Calls: withAutoprint ... withVisible -> eval -> eval -> lapply -> lapply -> FUN
Execution halted
* checking for unstated dependencies in 'tests' ... OK
* checking tests ... [266s] ERROR
  Running 'testthat.R' [265s]
Running the tests in 'tests/testthat.R' failed.
Complete output:
  > if (requireNamespace("testthat", quietly = TRUE)) {
  +   library("checkmate")
  +   library("testthat")
  +   library("mlr3")
  +   library("paradox")
  +   library("mlr3pipelines")
  +   test_check("mlr3pipelines")
  + }
  Starting 2 test processes.
  > test_Graph.R: Training debug.multi with input list(input_1 = 1, input_2 = 1)
  > test_PipeOp.R: Training test_autotrain
  > test_PipeOp.R: Predicting test_autotrain
  > test_PipeOp.R: Training test_autotrain
  > test_PipeOp.R: Training test_autotrain
  > test_PipeOp.R: Predicting test_autotrain
  > test_PipeOp.R: Predicting test_autotrain
  > test_PipeOp.R: Training test_autotrain
  > test_PipeOp.R: Training test_autotrain
  > test_PipeOp.R: Training test_autotrain
  > test_PipeOp.R: Predicting test_autotrain
  > test_PipeOp.R: Predicting test_autotrain
  > test_PipeOp.R: Predicting test_autotrain
  > test_PipeOp.R: Training test_autotrain
  > test_PipeOp.R: Predicting test_autotrain
  > test_PipeOp.R: Training test_autotrain
  > test_PipeOp.R: Training test_autotrain
  > test_PipeOp.R: Predicting test_autotrain
  > test_PipeOp.R: Predicting test_autotrain
  > test_PipeOp.R: Training test_autotrain
  > test_PipeOp.R: Training test_autotrain
  > test_PipeOp.R: Training test_autotrain
  > test_PipeOp.R: Predicting test_autotrain
  > test_PipeOp.R: Predicting test_autotrain
  > test_PipeOp.R: Predicting test_autotrain
  > test_PipeOp.R: Training test_autotrain
  > test_PipeOp.R: Predicting test_autotrain
  > test_filter_ensemble.R: OptimInstanceSingleCrit is deprecated. Use OptimInstanceBatchSingleCrit instead.
  > test_mlr_graphs_robustify.R: 'as(<dgCMatrix>, "dgTMatrix")' is deprecated.
  > test_mlr_graphs_robustify.R: Use 'as(., "TsparseMatrix")' instead.
  > test_mlr_graphs_robustify.R: See help("Deprecated") and help("Matrix-deprecated").
  > test_multiplicities.R: 
  > test_multiplicities.R: [[1]]
  > test_multiplicities.R: 
  > test_multiplicities.R: [1] 0
  > test_multiplicities.R: 
  > test_pipeop_blsmote.R: [1] "Borderline-SMOTE done"
  > test_pipeop_blsmote.R: [1] "Borderline-SMOTE done"
  > test_pipeop_blsmote.R: [1] "Borderline-SMOTE done"
  > test_pipeop_blsmote.R: [1] "Borderline-SMOTE done"
  Saving _problems/test_pipeop_datefeatures-7.R
  Saving _problems/test_pipeop_datefeatures-17.R
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.001964: Isomap START
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.0031: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.019173: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.044316: Classical Scaling
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.114861: Isomap START
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.115526: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.127409: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.150299: Classical Scaling
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.189255: L-Isomap embed START
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.189936: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.213388: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.263855: embedding
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.26569: DONE
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.303771: L-Isomap embed START
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.304465: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.40646: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.45199: embedding
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.453635: DONE
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.574761: Isomap START
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.575391: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.594846: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.715687: Classical Scaling
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.762399: L-Isomap embed START
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.76326: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:24.803773: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.034062: embedding
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.039621: DONE
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.246603: Isomap START
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.24724: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.257379: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.279402: Classical Scaling
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.322786: L-Isomap embed START
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.323652: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.357486: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.405931: embedding
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.407758: DONE
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.598572: Isomap START
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.599252: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.609102: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.629679: Classical Scaling
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.69854: L-Isomap embed START
  > test_pipeop_isomap.R: 2025-12-15 08:40:25.699476: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.24019: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.286812: embedding
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.288325: DONE
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.405129: Isomap START
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.405788: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.417375: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.439357: Classical Scaling
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.50688: L-Isomap embed START
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.507768: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.526779: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.576545: embedding
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.578374: DONE
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.665948: Isomap START
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.666399: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.67382: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.68888: Classical Scaling
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.75379: L-Isomap embed START
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.754636: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.773947: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.822289: embedding
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.824274: DONE
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.926376: Isomap START
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.927071: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.939285: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:26.961014: Classical Scaling
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.023772: L-Isomap embed START
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.024649: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.047719: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.095961: embedding
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.097851: DONE
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.220681: Isomap START
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.221372: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.234399: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.255501: Classical Scaling
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.357687: Isomap START
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.358418: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.371688: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.394745: Classical Scaling
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.452627: Isomap START
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.453397: constructing knn graph
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.464631: calculating geodesic distances
  > test_pipeop_isomap.R: 2025-12-15 08:40:27.488324: Classical Scaling
  Saving _problems/test_pipeop_nmf-45.R
  Saving _problems/test_pipeop_nmf-73.R
  Saving _problems/test_pipeop_nmf-93.R
  Saving _problems/test_pipeop_nmf-98.R
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_task_preproc.R: Training debug_affectcols
  > test_pipeop_tunethreshold.R: OptimInstanceSingleCrit is deprecated. Use OptimInstanceBatchSingleCrit instead.
  > test_pipeop_tunethreshold.R: OptimInstanceSingleCrit is deprecated. Use OptimInstanceBatchSingleCrit instead.
  > test_pipeop_tunethreshold.R: OptimInstanceSingleCrit is deprecated. Use OptimInstanceBatchSingleCrit instead.
  > test_pipeop_tunethreshold.R: OptimInstanceSingleCrit is deprecated. Use OptimInstanceBatchSingleCrit instead.
  > test_pipeop_tunethreshold.R: OptimInstanceSingleCrit is deprecated. Use OptimInstanceBatchSingleCrit instead.
  > test_pipeop_tunethreshold.R: OptimInstanceSingleCrit is deprecated. Use OptimInstanceBatchSingleCrit instead.
  > test_pipeop_tunethreshold.R: OptimInstanceSingleCrit is deprecated. Use OptimInstanceBatchSingleCrit instead.
  [ FAIL 6 | WARN 0 | SKIP 99 | PASS 13006 ]
  
  ══ Skipped tests (99) ══════════════════════════════════════════════════════════
  • On CRAN (95): 'test_CnfFormula_simplify.R:6:3', 'test_CnfFormula.R:591:3',
    'test_Graph.R:283:3', 'test_PipeOp.R:32:1', 'test_GraphLearner.R:5:3',
    'test_GraphLearner.R:221:3', 'test_GraphLearner.R:343:3',
    'test_GraphLearner.R:408:3', 'test_GraphLearner.R:571:3',
    'test_dictionary.R:7:3', 'test_learner_weightedaverage.R:5:3',
    'test_learner_weightedaverage.R:57:3',
    'test_learner_weightedaverage.R:105:3',
    'test_learner_weightedaverage.R:152:3', 'test_meta.R:39:3',
    'test_mlr_graphs_branching.R:26:3', 'test_mlr_graphs_bagging.R:6:3',
    'test_mlr_graphs_robustify.R:5:3', 'test_pipeop_adas.R:8:3',
    'test_pipeop_blsmote.R:8:3', 'test_pipeop_branch.R:4:3',
    'test_pipeop_chunk.R:4:3', 'test_pipeop_classbalancing.R:7:3',
    'test_pipeop_boxcox.R:7:3', 'test_pipeop_classweights.R:10:3',
    'test_pipeop_collapsefactors.R:6:3', 'test_pipeop_colapply.R:9:3',
    'test_pipeop_copy.R:5:3', 'test_pipeop_colroles.R:6:3',
    'test_pipeop_decode.R:14:3', 'test_pipeop_encode.R:21:3',
    'test_pipeop_encodeimpact.R:11:3', 'test_pipeop_encodepl.R:5:3',
    'test_pipeop_encodepl.R:72:3', 'test_pipeop_encodelmer.R:15:3',
    'test_pipeop_encodelmer.R:37:3', 'test_pipeop_encodelmer.R:80:3',
    'test_pipeop_featureunion.R:9:3', 'test_pipeop_featureunion.R:134:3',
    'test_pipeop_filter.R:7:3', 'test_pipeop_fixfactors.R:9:3',
    'test_pipeop_ensemble.R:6:3', 'test_pipeop_histbin.R:7:3',
    'test_pipeop_ica.R:7:3', 'test_pipeop_impute.R:4:3',
    'test_pipeop_imputelearner.R:43:3', 'test_pipeop_isomap.R:10:3',
    'test_pipeop_kernelpca.R:9:3', 'test_pipeop_learner.R:17:3',
    'test_pipeop_info.R:6:3', 'test_pipeop_learnerpicvplus.R:163:3',
    'test_pipeop_missind.R:6:3', 'test_pipeop_modelmatrix.R:7:3',
    'test_pipeop_learnercv.R:31:3', 'test_pipeop_multiplicityexply.R:9:3',
    'test_pipeop_mutate.R:9:3', 'test_pipeop_nearmiss.R:7:3',
    'test_pipeop_multiplicityimply.R:9:3', 'test_pipeop_ovr.R:9:3',
    'test_pipeop_ovr.R:48:3', 'test_pipeop_pca.R:8:3',
    'test_pipeop_proxy.R:14:3', 'test_pipeop_quantilebin.R:5:3',
    'test_pipeop_randomprojection.R:6:3', 'test_pipeop_randomresponse.R:5:3',
    'test_pipeop_removeconstants.R:6:3', 'test_pipeop_renamecolumns.R:6:3',
    'test_pipeop_replicate.R:9:3', 'test_pipeop_rowapply.R:6:3',
    'test_pipeop_nmf.R:6:3', 'test_pipeop_scalemaxabs.R:6:3',
    'test_pipeop_scale.R:6:3', 'test_pipeop_scale.R:10:3',
    'test_pipeop_scalerange.R:7:3', 'test_pipeop_select.R:9:3',
    'test_pipeop_smote.R:10:3', 'test_pipeop_smotenc.R:8:3',
    'test_pipeop_subsample.R:6:3', 'test_pipeop_targetinvert.R:4:3',
    'test_pipeop_targetmutate.R:5:3', 'test_pipeop_targettrafo.R:4:3',
    'test_pipeop_targettrafoscalerange.R:5:3', 'test_pipeop_task_preproc.R:4:3',
    'test_pipeop_task_preproc.R:14:3', 'test_pipeop_spatialsign.R:6:3',
    'test_pipeop_tomek.R:7:3', 'test_pipeop_textvectorizer.R:37:3',
    'test_pipeop_textvectorizer.R:186:3', 'test_pipeop_unbranch.R:10:3',
    'test_pipeop_updatetarget.R:89:3', 'test_pipeop_vtreat.R:9:3',
    'test_pipeop_yeojohnson.R:7:3', 'test_pipeop_tunethreshold.R:111:3',
    'test_pipeop_tunethreshold.R:191:3', 'test_typecheck.R:188:3'
  • Skipping (1): 'test_GraphLearner.R:1278:3'
  • empty test (3): 'test_pipeop_isomap.R:111:1', 'test_pipeop_missind.R:101:1',
    'test_ppl.R:61:1'
  
  ══ Failed tests ════════════════════════════════════════════════════════════════
  ── Error ('test_pipeop_datefeatures.R:7:3'): PipeOpDateFeatures - basic properties ──
  Error in `seq.Date(as.Date("2020-01-31"), length.out = 150L)`: exactly two of 'to', 'by' and 'length.out' / 'along.with' must be specified
  Backtrace:
      ▆
   1. ├─base::seq(as.Date("2020-01-31"), length.out = 150L) at test_pipeop_datefeatures.R:7:3
   2. └─base::seq.Date(as.Date("2020-01-31"), length.out = 150L)
  ── Error ('test_pipeop_datefeatures.R:17:3'): PipeOpDateFeatures - finds POSIXct column ──
  Error in `seq.Date(as.Date("2020-01-31"), length.out = 150L)`: exactly two of 'to', 'by' and 'length.out' / 'along.with' must be specified
  Backtrace:
      ▆
   1. ├─base::seq(as.Date("2020-01-31"), length.out = 150L) at test_pipeop_datefeatures.R:17:3
   2. └─base::seq.Date(as.Date("2020-01-31"), length.out = 150L)
  ── Error ('test_pipeop_nmf.R:45:3'): PipeOpNMF - does not modify search path when NMF is not loaded, fix for #929 ──
  Error in `detach(package:generics)`: invalid 'name' argument
  Backtrace:
      ▆
   1. └─base::detach(package:generics) at test_pipeop_nmf.R:45:3
  ── Failure ('test_pipeop_nmf.R:73:3'): PipeOpNMF - does not modify search path when NMF is loaded, fix for #929 ──
  Expected `all(...)` to be TRUE.
  Differences:
  `actual`:   FALSE
  `expected`: TRUE 
  
  ── Failure ('test_pipeop_nmf.R:93:3'): PipeOpNMF - does not modify search path when some of NMF's dependencies are loaded, fix for #929 ──
  Expected `all(paste0("package:", c("BiocGenerics", "generics")) %in% search())` to be TRUE.
  Differences:
  `actual`:   FALSE
  `expected`: TRUE 
  
  ── Error ('test_pipeop_nmf.R:98:3'): PipeOpNMF - does not modify search path when some of NMF's dependencies are loaded, fix for #929 ──
  Error in `FUN(X[[i]], ...)`: invalid 'name' argument
  This happened in PipeOp nmf's $train()
  Backtrace:
       ▆
    1. ├─op$train(list(tsk("iris"))) at test_pipeop_nmf.R:98:3
    2. │ └─mlr3pipelines:::.__PipeOp__train(...)
    3. │   ├─base::withCallingHandlers(...)
    4. │   └─private$.train(input)
    5. │     └─mlr3pipelines:::.__PipeOpTaskPreproc__.train(...)
    6. │       └─private$.train_task(intask)
    7. │         └─mlr3pipelines:::.__PipeOpTaskPreproc__.train_task(...)
    8. │           ├─data.table::as.data.table(...)
    9. │           └─private$.train_dt(dt, task$levels(cols), task$truth())
   10. │             └─mlr3pipelines:::.__PipeOpNMF__.train_dt(...)
   11. │               └─mlr3misc::map(to_be_detached, detach, character.only = TRUE)
   12. │                 └─base::lapply(.x, .f, ...)
   13. │                   └─base (local) FUN(X[[i]], ...)
   14. │                     └─base::stop("invalid 'name' argument")
   15. └─base::.handleSimpleError(...)
   16.   └─mlr3pipelines (local) h(simpleError(msg, call))
  
  [ FAIL 6 | WARN 0 | SKIP 99 | PASS 13006 ]
  Error:
  ! Test failures.
  Execution halted
* checking for unstated dependencies in vignettes ... OK
* checking package vignettes ... OK
* checking re-building of vignette outputs ... [6s] OK
* checking PDF version of manual ... [75s] OK
* checking HTML version of manual ... [52s] OK
* DONE
Status: 2 ERRORs