Cannot replicate a build failure caused by the expired key:
==> Verifying source file signatures with gpg...
gcc-9.3.0.tar.xz ... Passed (WARNING: the key has expired.)
An expired key for a release signature would seem to be an upstream issue rather than a packaging issue.
Pinned Comments
jonathon commented on 2020-11-30 14:28
Please read the AUR wiki page before reporting issues.
If you are experiencing a build issue then ensure you are not using an AUR helper and are using a clean chroot.