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### Running command:
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###   /home/biocbuild/bbs-3.21-bioc/R/bin/R CMD build --keep-empty-dirs --no-resave-data Macarron
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* checking for file ‘Macarron/DESCRIPTION’ ... OK
* preparing ‘Macarron’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘Macarron.Rmd’ using rmarkdown

Quitting from Macarron.Rmd:92-106 [unnamed-chunk-2]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error:
! <ggplot2::labels> object is invalid:
- every label must be named.
---
Backtrace:
    ▆
 1. └─Macarron::Macarron(...)
 2.   └─Macarron::calQval(...)
 3.     └─Maaslin2::Maaslin2(...)
 4.       └─Maaslin2:::maaslin2_association_plots(...)
 5.         └─ggplot2::labs("")
 6.           └─ggplot2::class_labels(args)
 7.             └─S7::new_object(labels)
 8.               └─S7::validate(object, recursive = !parent_validated)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'Macarron.Rmd' failed with diagnostics:
<ggplot2::labels> object is invalid:
- every label must be named.
--- failed re-building ‘Macarron.Rmd’

SUMMARY: processing the following file failed:
  ‘Macarron.Rmd’

Error: Vignette re-building failed.
Execution halted