Error in re-building vignettes:
  ...
Warning in `[<-`(`*tmp*`, i, value = <S4 object of class "RasterLayer">) :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = <S4 object of class "RasterLayer">) :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = <S4 object of class "RasterLayer">) :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = <S4 object of class "RasterLayer">) :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = <S4 object of class "RasterLayer">) :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = <S4 object of class "RasterLayer">) :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = <S4 object of class "RasterLayer">) :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = <S4 object of class "RasterLayer">) :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = <S4 object of class "RasterLayer">) :
  implicit list embedding of S4 objects is deprecated
--smart/-S has been removed.  Use +smart or -smart extension instead.
For example: pandoc -f markdown+smart -t markdown-smart.
Try pandoc.exe --help for more information.
Warning: running command '"D:/compiler/pandoc/pandoc" +RTS -K512m -RTS Landsat8.utf8.md --to html --from markdown+autolink_bare_uris+ascii_identifiers+tex_math_single_backslash --output Landsat8.html --smart --email-obfuscation none --self-contained --standalone --section-divs --template "d:\RCompile\CRANpkg\lib\3.4\rmarkdown\rmd\h\default.html" --highlight-style pygments --css "d:\RCompile\CRANpkg\lib\3.4\rmarkdown\rmarkdown\templates\html_vignette\resources\vignette.css" --mathjax --variable "mathjax-url:https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"' had status 2
Error: processing vignette 'Landsat8.Rmd' failed with diagnostics:
pandoc document conversion failed with error 2
Execution halted