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### Running command:
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###   /home/biocbuild/bbs-3.20-bioc/R/bin/R CMD build --keep-empty-dirs --no-resave-data OSCA.basic
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* checking for file ‘OSCA.basic/DESCRIPTION’ ... OK
* preparing ‘OSCA.basic’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘stub.Rmd’ using rmarkdown
[WARNING] This document format requires a nonempty <title> element.
  Please specify either 'title' or 'pagetitle' in the metadata,
  e.g. by using --metadata pagetitle="..." on the command line.
  Falling back to 'stub.knit'
--- finished re-building ‘stub.Rmd’

"/home/biocbuild/bbs-3.20-bioc/R/bin/R" -e "work.dir <- rebook::bookCache('OSCA.basic'); handle <- rebook::preCompileBook('../inst/book', work.dir=work.dir, desc='../DESCRIPTION'); old.dir <- setwd(work.dir); bookdown::render_book('index.Rmd'); setwd(old.dir); rebook::postCompileBook(work.dir=work.dir, final.dir='../inst/doc/book', handle=handle)"

R version 4.4.1 (2024-06-14) -- "Race for Your Life"
Copyright (C) 2024 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

  Natural language support but running in an English locale

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> work.dir <- rebook::bookCache('OSCA.basic'); handle <- rebook::preCompileBook('../inst/book', work.dir=work.dir, desc='../DESCRIPTION'); old.dir <- setwd(work.dir); bookdown::render_book('index.Rmd'); setwd(old.dir); rebook::postCompileBook(work.dir=work.dir, final.dir='../inst/doc/book', handle=handle)
# 
# 
# processing file: cell-annotation.Rmd
# 1/76                        
# 2/76 [setup]                
# 3/76                        
# 4/76 [unnamed-chunk-1]      
# 5/76                        
# 6/76 [unnamed-chunk-2]      
# 7/76                        
# 8/76 [unnamed-chunk-3]      
# 9/76                        
# 10/76 [unnamed-chunk-4]      
# 11/76                        
# 12/76 [singler-heat-pbmc]    
# 13/76                        
# 14/76 [singler-cluster]      
# 15/76                        
# 16/76 [unnamed-chunk-5]      
# 17/76                        
# 18/76 [unnamed-chunk-6]      
# 19/76                        
# 20/76 [unnamed-chunk-7]      
# Error in `sce.muraro$label`:
# ! $ operator is invalid for atomic vectors
# 
# Quitting from lines 126-132 [unnamed-chunk-7] (cell-annotation.Rmd)
# Execution halted

Error in compileChapter(path) : 
  failed to compile '~/.cache/rebook/OSCA.basic/1.13.3/cell-annotation.Rmd'
Calls: <Anonymous> ... .precompile_book -> .locked_compile_chapter -> compileChapter
Execution halted
make: *** [Makefile:4: compiled] Error 1
Error in tools::buildVignettes(dir = ".", tangle = TRUE) : 
  running 'make' failed
Execution halted