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### Running command:
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###   /Library/Frameworks/R.framework/Resources/bin/R CMD build --keep-empty-dirs --no-resave-data scruff
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* checking for file ‘scruff/DESCRIPTION’ ... OK
* preparing ‘scruff’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘scruff.Rmd’ using rmarkdown
2025-09-16 17:39:37.239 R[10447:252460370] XType: Using static font registry.

Quitting from scruff.Rmd:218-227 [visualize_reads]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error in `validObject()`:
! invalid class "GGbio" object: invalid object for slot "ggplot" in class "GGbio": got class "ggplot2::ggplot", should be or extend class "gg_OR_NULL"
---
Backtrace:
     ▆
  1. └─scruff::rview(bamExample, chr = "MT", start = start, end = end)
  2.   ├─ggplot2::ggplot(readsGr)
  3.   └─ggbio:::ggplot.Vector(readsGr)
  4.     └─ggbio::GGbio(gg, data = data)
  5.       ├─BiocGenerics::do.call(...)
  6.       ├─base::do.call(...)
  7.       └─methods (local) `<fn>`(...)
  8.         ├─methods::initialize(value, ...)
  9.         └─methods::initialize(value, ...)
 10.           └─methods::validObject(.Object)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'scruff.Rmd' failed with diagnostics:
invalid class "GGbio" object: invalid object for slot "ggplot" in class "GGbio": got class "ggplot2::ggplot", should be or extend class "gg_OR_NULL"
--- failed re-building ‘scruff.Rmd’

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

Error: Vignette re-building failed.
Execution halted