Turn sufficiently old compatibility lints into hard errors#42136

Merged

bors merged 3 commits intorust-lang:masterfrom petrochenkov:oldhard

Jun 1, 2017

+107-224

Commits on May 30, 2017

Turn sufficiently old compatibility lints into hard errors
petrochenkov
committed
Turn public reexporting of private extern crates into a lint again
petrochenkov
committed
Turn invalid_type_param_default into a lint again
petrochenkov
committed