Comment 1 for bug 1532991

There's a potential risk here introducing a backward incompatible change at the low level api too unfortunately (glance, horizon) [1] - although the flip side is we may prevent them from introducing the same kind of bug depending on if they more strictly validate their input that we apparently have?

It's possible the best we can do is a warning depending on how grievous we perceive the risk.

1. Thanks for the reminder @timburke!