Currently squid enable ipv6 support by default. So negative USE flag -ipv6 is a no-op. Let's fix it by using --disable-ipv6 if requested. Reproducible: Always
Created attachment 388378 [details, diff] squid-3.3.13-r1.ebuild_fix_ipv6_useflag.patch
Comment on attachment 388378 [details, diff] squid-3.3.13-r1.ebuild_fix_ipv6_useflag.patch >+ ${use_disable_ipv6} \ > $(use_with caps libcap) \ >- $(use_enable ipv6) \ use_enable should already emit "--disable-ipv6" so there ought to be no reason to emulate that.
You are right. Sorry for the noise.