Oops, I was a bit careless. Let me clarify: the patch in my PR is not from the actual upstream for the package, but rather from the fork [1] linked to by Thomas Koch in #959729 [2].
[1] https://github.com/teleshoes/acpi_call [2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=959729#10