snakecase::to_any_case() causes warnings on 1st run due to UTF-8 characters

[cjyetman]

Honestly, I can only reliably replicate this in one specific environment (2dii/r-packages), but it seems to be related to how UTF-8 characters are defined in replace_special_characters_internal.R.

snakecase::to_any_case("\u00E4ngstlicher Has\u00EA", transliterations = c("german", "Latin-ASCII"))
warnings()
sessionInfo()

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snakecase::to_any_case("\u00E4ngstlicher Has\u00EA", transliterations = c("german", "Latin-ASCII"))
[1] "aengstlicher_hase"
There were 13 warnings (use warnings() to see them)
warnings()
Warning messages:
1: In FUN(X[[i]], ...) : unable to translate '<U+00C4>' to native encoding
2: In FUN(X[[i]], ...) : unable to translate '<U+00D6>' to native encoding
3: In FUN(X[[i]], ...) : unable to translate '<U+00DC>' to native encoding
4: In FUN(X[[i]], ...) : unable to translate '<U+00E4>' to native encoding
5: In FUN(X[[i]], ...) : unable to translate '<U+00F6>' to native encoding
6: In FUN(X[[i]], ...) : unable to translate '<U+00FC>' to native encoding
7: In FUN(X[[i]], ...) : unable to translate '<U+00DF>' to native encoding
8: In FUN(X[[i]], ...) : unable to translate '<U+00C6>' to native encoding
9: In FUN(X[[i]], ...) : unable to translate '<U+00E6>' to native encoding
10: In FUN(X[[i]], ...) : unable to translate '<U+00D8>' to native encoding
11: In FUN(X[[i]], ...) : unable to translate '<U+00F8>' to native encoding
12: In FUN(X[[i]], ...) : unable to translate '<U+00C5>' to native encoding
13: In FUN(X[[i]], ...) : unable to translate '<U+00E5>' to native encoding
sessionInfo()
R version 4.0.3 (2020-10-10)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 18.04.5 LTS

Matrix products: default
BLAS: /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.7.1
LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.7.1

locale:
[1] C

attached base packages:
[1] stats graphics grDevices utils datasets methods base

loaded via a namespace (and not attached):
[1] compiler_4.0.3 magrittr_1.5 snakecase_0.11.0 tools_4.0.3
[5] stringi_1.5.3 stringr_1.4.0

I can also replicate getting these warnings with...

snakecase:::replace_special_characters_internal

or...

get("replace_special_characters_internal", envir = asNamespace("snakecase"), inherits = FALSE)

always only on the first time it's run in a session.

The warnings appear when snakecase:::replace_special_characters_internal() is loaded for the first time. I ended up here because janitor::make_clean_names() calls snakecase:::replace_special_characters_internal(), triggering these warnings.

Maybe, for instance, intToUtf8(220) would be safer than "\u00C4"? 🤷🏻
any idea what's causing this?

[cjyetman]

something similar is happening on CRAN's windows build: https://www.r-project.org/nosvn/R.check/r-release-windows-ix86+x86_64/snakecase-00check.html