* using log directory ‘/srv/hornik/tmp/CRAN_pretest/blockr.core.Rcheck’
* using R Under development (unstable) (2026-04-27 r89967)
* using platform: x86_64-pc-linux-gnu
* R was compiled by
    Debian clang version 21.1.8 (3+b1)
    Debian flang version 21.1.8 (3+b1)
* running under: Debian GNU/Linux forky/sid
* using session charset: UTF-8
* current time: 2026-04-28 11:19:06 UTC
* checking for file ‘blockr.core/DESCRIPTION’ ... OK
* this is package ‘blockr.core’ version ‘0.1.2’
* package encoding: UTF-8
* checking CRAN incoming feasibility ... [4s/5s] 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 ‘blockr.core’ can be installed ... [5s/5s] OK
* checking package directory ... OK
* checking for future file timestamps ... 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/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/1s] OK
* checking whether startup messages can be suppressed ... [1s/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 ... [11s/11s] OK
* checking Rd files ... [0s/0s] 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 installed files from ‘inst/doc’ ... OK
* checking files in ‘vignettes’ ... OK
* checking examples ... [2s/2s] OK
* checking for unstated dependencies in ‘tests’ ... OK
* checking tests ... [16s/16s] OK
  Running ‘testthat.R’ [16s/16s]
* checking for unstated dependencies in vignettes ... OK
* checking package vignettes ... OK
* checking re-building of vignette outputs ... [17s/15s] ERROR
Error(s) in re-building vignettes:
  ...
--- re-building ‘blocks-registry.qmd’ using html


processing file: blocks-registry.qmd
output file: blocks-registry.knit.md

ERROR: Chrome not found

No Chrome or Chromium installation was detected.

Please run 'quarto install chrome-headless-shell' to install a headless browser.

Error: processing vignette 'blocks-registry.qmd' failed with diagnostics:
! Error running quarto CLI from R.
Caused by error in `quarto_render()`:
✖ Error returned by quarto CLI.
  -----------------------------
  
  
  processing file: blocks-registry.qmd
  output file: blocks-registry.knit.md
  
  ERROR: Chrome not found
  
  No Chrome or Chromium installation was detected.
  
  Please run 'quarto install chrome-headless-shell' to install a headless
  browser.
  
  
Caused by error in `processx::run()`:
! System command 'quarto' failed
--- failed re-building ‘blocks-registry.qmd’

--- re-building ‘create-block.qmd’ using html


processing file: create-block.qmd
output file: create-block.knit.md

ERROR: Chrome not found

No Chrome or Chromium installation was detected.

Please run 'quarto install chrome-headless-shell' to install a headless browser.

Error: processing vignette 'create-block.qmd' failed with diagnostics:
! Error running quarto CLI from R.
Caused by error in `quarto_render()`:
✖ Error returned by quarto CLI.
  -----------------------------
  
  
  processing file: create-block.qmd
  output file: create-block.knit.md
  
  ERROR: Chrome not found
  
  No Chrome or Chromium installation was detected.
  
  Please run 'quarto install chrome-headless-shell' to install a headless
  browser.
  
  
Caused by error in `processx::run()`:
! System command 'quarto' failed
--- failed re-building ‘create-block.qmd’

--- re-building ‘extend-blockr.qmd’ using html


processing file: extend-blockr.qmd
output file: extend-blockr.knit.md

pandoc 
  to: html
  output-file: extend-blockr.html
  standalone: true
  embed-resources: true
  wrap: none
  default-image-extension: png
  css:
    - >-
      /home/hornik/lib/R/Library/4.7/x86_64-linux-gnu/quarto/rmarkdown/template/quarto_vignette/resources/vignette.css
  variables: {}
  
metadata
  document-css: false
  lang: en
  engines:
    - path: /opt/quarto/share/extension-subtrees/julia-engine/_extensions/julia-engine/julia-engine.js
  minimal: true
  theme: none
  title: 4. Extend blockr
  vignette: |
    %\VignetteIndexEntry{4. Extend blockr} %\VignetteEngine{quarto::html} %\VignetteEncoding{UTF-8}
  
Output created: extend-blockr.html

--- finished re-building ‘extend-blockr.qmd’

--- re-building ‘get-started.qmd’ using html


processing file: get-started.qmd
output file: get-started.knit.md

ERROR: Chrome not found

No Chrome or Chromium installation was detected.

Please run 'quarto install chrome-headless-shell' to install a headless browser.

Error: processing vignette 'get-started.qmd' failed with diagnostics:
! Error running quarto CLI from R.
Caused by error in `quarto_render()`:
✖ Error returned by quarto CLI.
  -----------------------------
  
  
  processing file: get-started.qmd
  output file: get-started.knit.md
  
  ERROR: Chrome not found
  
  No Chrome or Chromium installation was detected.
  
  Please run 'quarto install chrome-headless-shell' to install a headless
  browser.
  
  
Caused by error in `processx::run()`:
! System command 'quarto' failed
--- failed re-building ‘get-started.qmd’

--- re-building ‘testing-blocks.qmd’ using html


processing file: testing-blocks.qmd
output file: testing-blocks.knit.md

pandoc 
  to: html
  output-file: testing-blocks.html
  standalone: true
  embed-resources: true
  wrap: none
  default-image-extension: png
  css:
    - >-
      /home/hornik/lib/R/Library/4.7/x86_64-linux-gnu/quarto/rmarkdown/template/quarto_vignette/resources/vignette.css
  variables: {}
  
metadata
  document-css: false
  lang: en
  engines:
    - path: /opt/quarto/share/extension-subtrees/julia-engine/_extensions/julia-engine/julia-engine.js
  minimal: true
  theme: none
  title: 5. Testing blocks
  vignette: |
    %\VignetteIndexEntry{5. Testing blocks} %\VignetteEngine{quarto::html} %\VignetteEncoding{UTF-8}
  
Output created: testing-blocks.html

--- finished re-building ‘testing-blocks.qmd’

SUMMARY: processing the following files failed:
  ‘blocks-registry.qmd’ ‘create-block.qmd’ ‘get-started.qmd’

Error: Vignette re-building failed.
Execution halted

* checking PDF version of manual ... [4s/3s] OK
* checking HTML version of manual ... [2s/2s] OK
* checking for non-standard things in the check directory ... OK
* checking for detritus in the temp directory ... OK
* DONE
Status: 1 ERROR