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-rw-r--r--src/libsyntax/ext/concat.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/ext/concat.rs b/src/libsyntax/ext/concat.rs
index 314d63c2d3b..b2baff8d286 100644
--- a/src/libsyntax/ext/concat.rs
+++ b/src/libsyntax/ext/concat.rs
@@ -59,5 +59,5 @@ pub fn expand_syntax_ext(cx: &mut base::ExtCtxt,
     }
     base::MacExpr::new(cx.expr_str(
             sp,
-            token::intern_and_get_ident(accumulator.into_owned())))
+            token::intern_and_get_ident(accumulator.as_slice())))
 }