An Implementation Model for Rational Protocol Conformance Behavior

[dabrahams (Dave Abrahams)]

@mattrips

Is this seeming change in protocol conformance behavior due to something changing in the Standard Library, or in protocol conformance behavior generally (perhaps usage of the override keyword and @_nonoverride annotation), or something else?

You could always try bisecting for the offending commit.

Wow, when did override become legal on protocols?