USE="svga" is masked by base/use.mask because it is specific to x86/amd64, which unmask it themselves. Hardened/x86 profiles do not unmask it. I've had it manually unmasked for months with no issues, albeit on only partially-hardened setups. Is there a reason it is not umasked on hardened/x86*? Reproducible: Always Steps to Reproduce:
I just committed this one too, unmasking svga on the x86/2.6 profile.