When host-networking finally gave arp-scan a real LAN to scan, the
first MAC-match emitted a line, awk hit its `exit` clause, closed the
pipe, and arp-scan died from SIGPIPE (exit 141). With `set -o pipefail`
active, that killed the whole smoke-vm.sh run immediately after
"==> starting VM" — no IP discovery, no curl, no prune.
Fix: capture arp-scan's output into a variable first, then let awk
parse a here-string. Same treatment for the `ip neigh show` fallback.
No pipe, no pipefail cascade.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Daniel Maksymilian Syrnicki
93c6b838a7