"flag_group must contain either a list of flags or a list of flag_groups" for empty `archiver_flags`

[gr1mpatr0n]

rules_cc/cc/private/toolchain/windows_cc_toolchain_config.bzl

Line 609 in 794b5b0

flags = ctx.attr.archiver_flags,

It is perfectly valid to have an empty archiver_flags, in fact that is what it defaults to ([]). However, if ctx.attr.archiver_flags == [], you will receive the error:

fail("flag_group must contain either a list of flags or a list of flag_groups.")