R-Notebooks: German Umlaute break knitr::kable in R-Notebook Preview

[tilltnet]

Hi, I hope this is the right place for R-Notebook Issues.

I installed R-Studio 1.0.44 and updated all Notebook/ RMarkdown related packages.

When I use knitr::kable on data.frames, that contain german Umlaute like ä,ö,ü I get a "Invalid UTF-8 stream" error.

Here is a short example:

---
title: "R Notebook"
output:
html_notebook: default
---

```{r}
data.frame(x=c(1,2,3), y = c("ä",2,4))
knitr::kable(data.frame(x=c(1,2,3), y = c("a",2,4)))
knitr::kable(data.frame(x=c(1,2,3), y = c("ä",2,4)))
```

The first two lines work as expected, the last line produces this:

pandoc.exe: Cannot decode byte '\xe4': Data.Text.Internal.Encoding.Fusion.streamUtf8: Invalid UTF-8 stream
running command '"C:/Program Files/RStudio/bin/pandoc/pandoc" +RTS -K512m -RTS "C:\Users\X\AppData\Local\Temp\RtmpGwUchp\_rs_md_172ca734178.md" --to html --output "C:\X\.Rproj.user\shared\notebooks\FA410CF6-test\1\D73DC468\c5zeemgm7m62l_t\_rs_html_172c15805e1d.html"' had status 1
Error: pandoc document conversion failed with error 1`

[kevinushey]

I believe this bug is independent of knitr; it's specifically a bug in the render() handlers set up by RStudio. Can you try downloading the daily version of RStudio, and let us know if the issue is resolved there?

https://dailies.rstudio.com/

[tilltnet]

I installed the daily, but the problem remains.

After installing the daily the 'rprojroot' was prompted for an update and executing a code chunk brought up a message, that there was no 'rmarkdown' package installed. I installed it and than then the chunk was again rendered with the same error for the dataframe containing an Umlaut.

When I knit the same document there is no problem.

Here is the traceback of the error:

pandoc.exe: Cannot decode byte '\xe4': Data.Text.Internal.Encoding.Fusion.streamUtf8: Invalid UTF-8 stream
running command '"C:/Program Files/RStudio/bin/pandoc/pandoc" +RTS -K512m -RTS "C:\Users\x\AppData\Local\Temp\Rtmpkl65y3\_rs_md_19747554918.md" --to html --output "C:\Users\x\.Rproj.user\shared\notebooks\FA410CF6-test\1\D73DC468\c5zeemgm7m62l_t\_rs_html_19743d22eff.html"' had status 1

Error: pandoc document conversion failed with error 1
6. stop("pandoc document conversion failed with error ", result, call. = FALSE)
5.rmarkdown::pandoc_convert(input = rmarkdown::pandoc_path_arg(mdfile), to = "html", output = rmarkdown::pandoc_path_arg(htmlfile))
4.print.knit_asis(knitr::asis_output(x))
3.print(knitr::asis_output(x))
2.print.knitr_kable(x)
1.function (x, ...) UseMethod("print")(x)

[kevinushey]

Can you also post the output of utils::sessionInfo()?

[kevinushey]

I've reproduced this on a Windows VM; we should be able to get this fixed on the RStudio side soon. Thanks for reporting!

[davidizquierdogomez]

this is crazy but this little last comment about "Ñ" letter is the key to solve the problem....thank you very much indeed yihui

[github-actions]

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