Hello,
I encountered the same issue as described at "https://www.gitmemory.com/issue/edgarsuit/FreeNAS-Report/24/812802235"
Further error message:
awk: newline in string
newer... at source line 1
Temporary fix (added one more space at the end of "# 1":
lastTestHours=$("$smartctl" -l selftest "$drive" | grep "# 1 " | awk '{print $9}')