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-rw-r--r--src/libsyntax/ext/deriving/rand.rs1
1 files changed, 0 insertions, 1 deletions
diff --git a/src/libsyntax/ext/deriving/rand.rs b/src/libsyntax/ext/deriving/rand.rs
index 4f6e4d1fb3c..1ddf5b2a5c3 100644
--- a/src/libsyntax/ext/deriving/rand.rs
+++ b/src/libsyntax/ext/deriving/rand.rs
@@ -36,7 +36,6 @@ pub fn expand_deriving_rand<F>(cx: &mut ExtCtxt,
                 generics: LifetimeBounds {
                     lifetimes: Vec::new(),
                     bounds: vec!(("R",
-                                  None,
                                   vec!( Path::new(vec!("std", "rand", "Rng")) )))
                 },
                 explicit_self: None,