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-rw-r--r--compiler/rustc_serialize/src/opaque.rs4
1 files changed, 2 insertions, 2 deletions
diff --git a/compiler/rustc_serialize/src/opaque.rs b/compiler/rustc_serialize/src/opaque.rs
index 3bcb7cc3650..40b79ba89ef 100644
--- a/compiler/rustc_serialize/src/opaque.rs
+++ b/compiler/rustc_serialize/src/opaque.rs
@@ -18,8 +18,8 @@ pub struct Encoder {
 }
 
 impl Encoder {
-    pub fn new(data: Vec<u8>) -> Encoder {
-        Encoder { data }
+    pub fn new() -> Encoder {
+        Encoder { data: vec![] }
     }
 
     pub fn into_inner(self) -> Vec<u8> {