ref: 26e42d115979009c9fe144e1c28f740485537674
parent: 9ab4f2a2428ef5ad2f4abc118f589bd70f6c2f90
author: Jacob Moody <moody@posixcafe.org>
date: Wed Apr 5 22:59:11 EDT 2023
awk: getline: do not access unitialized data on EOF
echo 'a' | awk 'BEGIN { getline l; getline l; print (s=substr(l,1,10)) " len=" length(s) }'
https://github.com/onetrueawk/awk/commit/1debe1993fc852545a9215621d884be27f08a223