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-rw-r--r--src/libstd/io/mem.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstd/io/mem.rs b/src/libstd/io/mem.rs
index 786b5a08eed..ec4191297ce 100644
--- a/src/libstd/io/mem.rs
+++ b/src/libstd/io/mem.rs
@@ -350,7 +350,7 @@ impl<'a> Reader for BufReader<'a> {
         let write_len = min(buf.len(), self.buf.len() - self.pos);
         {
             let input = &self.buf[self.pos.. self.pos + write_len];
-            let output = &mut buf.slice_to_mut[..write_len];
+            let output = &mut buf[..write_len];
             assert_eq!(input.len(), output.len());
             slice::bytes::copy_memory(output, input);
         }