snap = "1"
tracing = "0.1"
memmap = "0.7"
-smallvec = { version = "1.0", features = ["union", "may_dangle"] }
+smallvec = { version = "1.6.1", features = ["union", "may_dangle"] }
rustc_middle = { path = "../rustc_middle" }
rustc_attr = { path = "../rustc_attr" }
rustc_data_structures = { path = "../rustc_data_structures" }