The file-scope case on CARCH ended in 'return 1', which aborted any 'source PKGBUILD' that did not export CARCH before pkgver and pkgrel were assigned. check-versions reads PKGBUILDs that way, saw an empty version, queued 8.12.34-35 on every tick, and promotion then refused to overwrite the already-published artifact. Every channel has been in backoff since 06:41 UTC today because of it.