In Guile 3.0.8, compilation warnings when byte-compiling print
<unknown-location>.
$ ./libguile/guile test.scm
;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
;;; or pass the --no-auto-compile argument to disable.
;;; compiling /.../test.scm
;;; <unknown-location>: warning: possibly unbound variable
`unbound-variable'
;;; compiled /home/jean/.cache/guile/ccache/3.0-LE-8-4.6/.../test.scm.go
Backtrace:
[snipped]
This was OK in 3.0.7.
This problem was originally reported at
https://lists.gnu.org/archive/html/guile-devel/2022-03/msg00017.html
