rustc_span = { path = "../librustc_span" }
rustc_errors = { path = "../librustc_errors" }
rustc_session = { path = "../librustc_session" }
-syntax = { path = "../libsyntax" }
+rustc_ast = { path = "../librustc_ast" }
smallvec = { version = "1.0", features = ["union", "may_dangle"] }