51c4652bca
Fix wrong assumption in the type propagator that marked the receiver as never nullable. R=srdjan@google.com BUG=dart:8739 Review URL: https://codereview.chromium.org//12330113 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@18991 260f80e4-7a28-3924-810f-c04153c831b5