fix #20018, allow skip constraint when merging interfaces#20883

Merged

rbuckton merged 1 commit intomicrosoft:masterfrom HerringtonDarkholme:relax-type-constraint

Jan 5, 2018

+179-7

Commits on Dec 24, 2017

fix microsoft#20018 , allow skip constraint when merging interfaces
HerringtonDarkholme
committed