[bmoyles]

It happens... I can think of a couple that bit me in the last 5 years or so. Some of them felt like bugs but were flagged as new features in later releases like this one from 4.4... spent way too long trying to figure out why this worked under 4.4 but not 4.3 and didn't even consider a bug, let alone a feature at the time. I was convinced it was something I did wrong :P

"a. Using ${a[@]} or ${a[*]} with an array without any assigned elements when the nounset option is enabled no longer throws an unbound variable error."