For about the last 5 days in the 1.9 branch we've been seeing this:
[INFO] Append metadata to Containerfile ... /builds/rhidp/rhdh/build/scripts/getNextReleaseNum.sh: line 75: quay.io/rhdh/rhdh-rhel9-operator:rhdh-operator-1-9-jl8pj-build-image-index-operator: syntax error: invalid arithmetic operator (error token is ".io/rhdh/rhdh-rhel9-operator:rhdh-operator-1-9-jl8pj-build-image-index-operator")
Builds are green in the 1.x branch: https://gitlab.cee.redhat.com/rhidp/rhdh/-/pipelines?page=1&scope=all&ref=rhdh-1-rhel-9