Exercises 4.9 using CONTAINS (v4.0.3)

[andrew_bowman]

As a follow-up, this does seem to be a bug, but likely not OS specific.

More details here:

toLower() Issue on Mac Computer - Version 4.0.3

The error is unexpected, possibly a bug. I'll raise it internally for investigation. EDIT Okay, here's what I found while tinkering: This looks to be a bug when a function (such as toLower(), toUpper(), or toString(), and likely others) is part of a predicate that involves usage of some of our substring predicates: CONTAINS, STARTS WITH, and ENDS WITH, and when one of the values processed by the function is not present (effectively null). A minimal reproduction without needing any data is: R…