• using R Under development (unstable) (2026-07-23 r90295)
• using platform: x86_64-pc-linux-gnu
• R was compiled by     gcc-16 (Debian 16.1.0-2) 16.1.0     GNU Fortran (Debian 16.1.0-2) 16.1.0
• running under: Debian GNU/Linux forky/sid
• using session charset: UTF-8 * current time: 2026-07-24 16:05:34 UTC
• checking for file ‘mlr3mbo/DESCRIPTION’ ... OK
• checking extension type ... Package
• this is package ‘mlr3mbo’ version ‘1.2.0’
• package encoding: UTF-8
• checking CRAN incoming feasibility ... [2s/4s] OK
• 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 executable files ... OK
• checking for hidden files and directories ... OK
• checking for portable file names ... OK
• checking for sufficient/correct file permissions ... OK
• checking serialization versions ... OK
• checking whether package ‘mlr3mbo’ can be installed ... OK See the install log for details.
• used C compiler: ‘gcc-16 (Debian 16.1.0-2) 16.1.0’
• checking package directory ... OK
• checking for future file timestamps ... 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/1s] OK
• checking whether the package can be loaded with stated dependencies ... [1s/1s] OK
• checking whether the package can be unloaded cleanly ... [1s/1s] OK
• checking whether the namespace can be loaded with stated dependencies ... [1s/1s] OK
• checking whether the namespace can be unloaded cleanly ... [1s/1s] OK
• checking loading without being on the library search path ... [1s/2s] OK
• checking whether startup messages can be suppressed ... [1s/2s] 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 ... [28s/34s] OK
• checking Rd files ... [1s/1s] OK
• checking Rd metadata ... OK
• checking Rd line widths ... 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 line endings in C/C++/Fortran sources/headers ... OK
• checking pragmas in C/C++ headers and code ... OK
• checking compilation flags used ... OK
• checking compiled code ... OK
• checking examples ... [12s/12s] OK
• checking for unstated dependencies in ‘tests’ ... OK
• checking tests ... [327s/380s] ERROR   Running ‘testthat.R’ [326s/379s] Running the tests in ‘tests/testthat.R’ failed. Complete output:   > if (requireNamespace("testthat", quietly = TRUE)) {   + library(testthat)   + library(checkmate)   + library(mlr3mbo)   + test_check("mlr3mbo")   + }   Loading required package: mlr3   Loading required package: mlr3tuning   Loading required package: paradox      Attaching package: 'mlr3mbo'      The following object is masked from 'package:testthat':          it      Loading required namespace: mlr3learners   Loading required namespace: DiceKriging   Loading required namespace: rgenoud   Saving _problems/test_ResultAssignerArchive-100.R   Saving _problems/test_ResultAssignerSurrogate-151.R   WARN [18:12:18.602] [bbotk] Caught the following error:   x Acquisition function optimization failed.   > Class: Mlr3ErrorMboAcqOptimizer   Caused by:     Optimizer Error.      WARN [18:12:19.135] [bbotk] Caught the following error:   x Surrogate update failed.   > Class: Mlr3ErrorMboSurrogateUpdate   Caused by:     x Surrogate Train Error.     > Class: Mlr3ErrorLearnerTrain      WARN [18:12:19.554] [bbotk] Caught the following error:   x Acquisition function optimization failed.   > Class: Mlr3ErrorMboAcqOptimizer   Caused by:     x Surrogate Predict Error.     > Class: Mlr3ErrorLearnerPredict      [ FAIL 2 | WARN 2 | SKIP 11 | PASS 1298 ]      ══ Skipped tests (11) ══════════════════════════════════════════════════════════   • On CRAN (11): 'test_AcqFunctionEHVIGH.R:87:3',     'test_AcqFunctionStochasticCB.R:15:1', 'test_AcqFunctionStochasticEI.R:2:1',     'test_OptimizerADBO.R:2:1', 'test_OptimizerAsyncMbo.R:2:1',     'test_OptimizerMbo.R:2:3', 'test_ResultAssignerSurrogate.R:18:3',     'test_TunerADBO.R:2:1', 'test_TunerAsyncMbo.R:2:1', 'test_TunerMbo.R:2:3',     'test_conditions.R:5:1'      ══ Failed tests ════════════════════════════════════════════════════════════════   ── Error ('test_ResultAssignerArchive.R:93:3'): ResultAssignerArchive passes internal tuned values ──   Error in `UseMethod("as_data_backend")`: no applicable method for 'as_data_backend' applied to an object of class "NULL"   Backtrace:        ▆     1. ├─mlr3tuning::ti(...) at test_ResultAssignerArchive.R:93:3     2. │ └─TuningInstance$new(...)     3. │ └─mlr3tuning (local) initialize(...)     4. │ └─mlr3tuning:::.__TuningInstanceBatchSingleCrit__initialize(...)     5. │ └─mlr3::assert_measures(...)     6. │ └─base::lapply(...)     7. │ └─mlr3 (local) FUN(X[[i]], ...)     8. └─mlr3::tsk("pima")     9. └─mlr3misc::dictionary_sugar_get(dict = mlr_tasks, .key, ...)    10. └─mlr3misc:::dictionary_get(dict, .key, .dicts_suggest = .dicts_suggest)    11. └─mlr3misc:::dictionary_initialize_item(key, obj, dots)    12. ├─base::do.call(constructor, cargs)    13. └─mlr3 (local) `<fn>`()    14. └─mlr3::as_data_backend(load_dataset("PimaIndiansDiabetes2", "mlbench"))   ── Error ('test_ResultAssignerSurrogate.R:144:3'): ResultAssignerSurrogate passes internal tuned values ──   Error in `UseMethod("as_data_backend")`: no applicable method for 'as_data_backend' applied to an object of class "NULL"   Backtrace:        ▆     1. ├─mlr3tuning::ti(...) at test_ResultAssignerSurrogate.R:144:3     2. │ └─TuningInstance$new(...)     3. │ └─mlr3tuning (local) initialize(...)     4. │ └─mlr3tuning:::.__TuningInstanceBatchSingleCrit__initialize(...)     5. │ └─mlr3::assert_measures(...)     6. │ └─base::lapply(...)     7. │ └─mlr3 (local) FUN(X[[i]], ...)     8. └─mlr3::tsk("pima")     9. └─mlr3misc::dictionary_sugar_get(dict = mlr_tasks, .key, ...)    10. └─mlr3misc:::dictionary_get(dict, .key, .dicts_suggest = .dicts_suggest)    11. └─mlr3misc:::dictionary_initialize_item(key, obj, dots)    12. ├─base::do.call(constructor, cargs)    13. └─mlr3 (local) `<fn>`()    14. └─mlr3::as_data_backend(load_dataset("PimaIndiansDiabetes2", "mlbench"))      [ FAIL 2 | WARN 2 | SKIP 11 | PASS 1298 ]   Error:   ! Test failures.   Execution halted
• checking PDF version of manual ... [9s/11s] OK
• checking HTML version of manual ... [5s/6s] OK
• checking for non-standard things in the check directory ... OK
• DONE

Status: 1 ERROR