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-rw-r--r--src/rustc/metadata/encoder.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/rustc/metadata/encoder.rs b/src/rustc/metadata/encoder.rs
index 597640ef410..fe432edeec6 100644
--- a/src/rustc/metadata/encoder.rs
+++ b/src/rustc/metadata/encoder.rs
@@ -117,7 +117,7 @@ fn encode_mutability(ebml_w: ebml::Writer, mt: class_mutability) {
 type entry<T> = {val: T, pos: uint};
 
 fn add_to_index(ecx: @encode_ctxt, ebml_w: ebml::Writer, path: &[ident],
-                &index: ~[entry<~str>], name: ident) {
+                index: &mut ~[entry<~str>], name: ident) {
     let mut full_path = ~[];
     full_path.push_all(path);
     full_path.push(name);