Summary: public
This was introduced by vjeux on 0a5967d and removed on 0686b01. I guess it was removed accidentally as this this is a nice warning to have that should prevent n00bs from commiting a common mistake
Reviewed By: frantic
Differential Revision: D2563885
fb-gh-sync-id: 9fae145bbec587514f118d1d28d076b1d82f0630