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-rw-r--r--src/librustc_data_structures/Cargo.toml2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/librustc_data_structures/Cargo.toml b/src/librustc_data_structures/Cargo.toml
index 188919d0633..1754376a5d7 100644
--- a/src/librustc_data_structures/Cargo.toml
+++ b/src/librustc_data_structures/Cargo.toml
@@ -19,7 +19,7 @@ stable_deref_trait = "1.0.0"
 rustc-rayon = "0.1.1"
 rustc-rayon-core = "0.1.1"
 rustc-hash = "1.0.1"
-smallvec = { version = "0.6.5", features = ["union"] }
+smallvec = { version = "0.6.7", features = ["union", "may_dangle"] }
 
 [dependencies.parking_lot]
 version = "0.6"