Fix CRAN issues in Debian r-devel

Kurt Hornik writes:

Dear maintainer, Please see the problems shown on https://cran.r-project.org/web/checks/check_results_learnr.html.

Please correct before 2023-10-03 to safely retain your package on CRAN.

This is about the errors on the Debian check systems, currently seen for r-devel-linux-x86_64-debian-gcc.

These are from a recent system upgrade which brought a new version of glibc to Debian testing bringing in the upstream glibc change

commit 2897b231a6b71ee17d47d3d63f1112b2641a476c Author: Bruno Haible [bruno@clisp.org](mailto:bruno@clisp.org) Date: Mon Sep 4 15:31:36 2023 +0200
intl: Treat C.UTF-8 locale like C locale (BZ# 16621)

The wiki page https://sourceware.org/glibc/wiki/Proposals/C.UTF-8
says that "Setting LC_ALL=C.UTF-8 will ignore LANGUAGE just like it
does with LC_ALL=C." This patch implements it.

* intl/dcigettext.c (guess_category_value): Treat C.<encoding> locale
like the C locale.

Reviewed-by: Florian Weimer <[fweimer@redhat.com](mailto:fweimer@redhat.com)>
via

debian/patches/any/git-c-utf-8-language.diff: backport support from upstream to treat C. locale like C locale. Closes: #874160.

The Debian checks use LANG=C.UTF-8, which now works "like the C locale", so messages will no longer be translated.

Please fix as necessary.

  ══ Failed tests ════════════════════════════════════════════════════════════════
  ── Failure ('test-i18n.R:225:3'): i18n_set_language_option() changes message language ──
  result$error_message not equal to "objet de type 'closure' non indiçable".
  1/1 mismatches
  x[1]: "object of type 'closure' is not subsettable"
  y[1]: "objet de type 'closure' non indiçable"
  ── Failure ('test-i18n.R:232:3'): i18n_set_language_option() changes message language ──
  result$error_message not equal to "objet de type 'closure' non indiçable".
  1/1 mismatches
  x[1]: "object of type 'closure' is not subsettable"
  y[1]: "objet de type 'closure' non indiçable"
  ── Failure ('test-i18n.R:254:3'): i18n_set_language_option() sets up language inheritance ──
  result$error_message not equal to "objeto de tipo 'closure' não possível dividir em subconjuntos".
  1/1 mismatches
  x[1]: "object of type 'closure' is not subsettable"
  y[1]: "objeto de tipo 'closure' não possível dividir em subconjuntos"
  ── Failure ('test-i18n.R:261:3'): i18n_set_language_option() sets up language inheritance ──
  result$error_message not equal to "objeto de tipo 'closure' não possível dividir em subconjuntos".
  1/1 mismatches
  x[1]: "object of type 'closure' is not subsettable"
  y[1]: "objeto de tipo 'closure' não possível dividir em subconjuntos"

  [ FAIL 4 | WARN 0 | SKIP 18 | PASS 819 ]
  Error: Test failures
  Execution halted

rstudio / learnr

Fix CRAN issues in Debian r-devel #800