'git status --short | head' under set -o pipefail: once the PR's pkgbuilds/ differs from base in more than ten files, head exits, git takes SIGPIPE and the step fails with 141 before anything builds. Every PR branched far enough behind master hit it (omadev #423, llmman-bin #428 and others on 2026-09-28). sed -n '1,10p' prints the same preview and drains the stream.