[R-pkg-team] Bug#1104454: r-cran-bslib: test fail - Undefined variable: "$transition-collapse-width"

[Chris Hofstaedtler]

Hi,

On Wed, Apr 30, 2025 at 01:47:15PM +0100, Rebecca N. Palmer wrote:
> Package: r-cran-bslib
> Version: 0.9.0+dfsg-2
> Severity: serious
> Control: affects -1 r-cran-rmarkdown
> 
> Since twitter-bootstrap4 4.6.2 added transition-collapse-width, some
> r-cran-bslib and r-cran-rmarkdown tests are failing with
> 
> Error in `compile_data(sass_input, options)`: Error: Undefined variable:
> "$transition-collapse-width".
>          on line 24:25 of
> ../../../../../../usr/share/sass/bootstrap/_transitions.scss
>          from line 29:9 of stdin
>  >>     @include transition($transition-collapse-width);

Additionally, older test runs of r-cran-bslib did have these 
failures in run-unit-test, but the test failure was not propagated 
to autopkgtest:

https://ci.debian.net/data/autopkgtest/testing/amd64/r/r-cran-bslib/60302536/log.gz

...
 47s [ FAIL 3 | WARN 661 | SKIP 32 | PASS 511 ]

 48s autopkgtest [16:13:35]: test run-unit-test:  - - - - - - - - - - results - - - - - - - - - -
 48s run-unit-test        PASS


Is this a known bug in some older test runner? If so, is that fixed, 
so future failures will be correctly treated as failures?

Chris