unicode escape character (generated by **dplyr** warning?) generates error when rendering to .pdf

[mikeroswell]

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--

Error knitting to .pdf from .rmd seems to occur with warnings generated by dplyr, suggesting a problem with a unicode escape.

I was able to reproduce with this

---
title: "special_i"
author: "Michael Roswell"
date: "2023-02-24"
output: 
  pdf_document: 
    latex_engine: pdflatex
---
seems like the dplyr warning message creates problems with 

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
library(dplyr)

mtcars[1,"carb"] <- NA
mtcars %>% summarize_all(sqrt)

xfun::session_info('knitr') R version 4.2.2 (2022-10-31) Platform: aarch64-apple-darwin20 (64-bit) Running under: macOS Ventura 13.2.1, RStudio 2022.12.0.353

Locale: en_US.UTF-8 / en_US.UTF-8 / en_US.UTF-8 / C / en_US.UTF-8 / en_US.UTF-8

Package version: evaluate_0.20 graphics_4.2.2 grDevices_4.2.2 highr_0.10 knitr_1.42
methods_4.2.2 stats_4.2.2 tools_4.2.2 utils_4.2.2 xfun_0.37
yaml_2.3.7

https://stackoverflow.com/q/75504968/8400969

[mikeroswell]

c.f. #2231

[cderv]

For more context, this is the emitted warning that shows in knitted output with dplyr

It does not seems like the output link is correct for support with knitr. I think this is an issue with dplyr or maybe cli which should be what is used there.

Usually the ANSI code formatting for cli use to get nice output in console should be deactivating when knitting.

See also with html_document()

BTW regarding #2231, this is a matter of latex_engine, and xelatex should be used when unicode https://bookdown.org/yihui/rmarkdown-cookbook/latex-unicode.html

It does not solve issue here, because I think there is something that shouldn't be printed anyway.

[cderv]

The message comes from lifecycle package https://github.com/r-lib/lifecycle/blob/80a1e521f995671d062a338856110198b3cdd5e3/R/deprecate.R#L221-L225 with the use of {.url {url}} formatting in cli

This is ultimately an issue within cli

> xfun::raw_string(
+     knitr::knit(text = c("```{r}", 'url <- "https://github.com/yihui/knitr/issues"', 'cli::format_inline("Please report the issue at {.url {url}}.")', '```'))
+ )

```r
url <- "https://github.com/yihui/knitr/issues"
cli::format_inline("Please report the issue at {.url {url}}.")

## [1] "Please report the issue at <\033]8;;https://github.com/yihui/knitr/issues\ahttps://github.com/yihui/knitr/issues\033]8;;\a>."

What is expected is all the ANSI formatting to be removed 
````r
> xfun::raw_string(
+     knitr::knit(text = c("```{r}", 'cli::format_inline("A message for {.emph later}, thanks {.fn format_inline}.")', '```'))
+ )

```r
cli::format_inline("A message for {.emph later}, thanks {.fn format_inline}.")

## [1] "A message for later, thanks `format_inline()`."

[mikeroswell]

Looks like it's on their radar: https://github.com/r-lib/cli/issues/581#issue-1576635242

[cderv]

yes thanks, I was writing a message there. Didn't know you where also digging into that.

[mikeroswell]

Thanks, your message was more helpful! Since I had complained in the first place, I figured it might be my job to close the loop.

[gaborcsardi]

This should be fixed in dev cli: https://github.com/r-lib/cli/issues/581 Can you please confirm?

[cderv]

It works for me now with your example @mikeroswell and dev cli

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