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-rw-r--r--src/libstd/old_io/mem.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstd/old_io/mem.rs b/src/libstd/old_io/mem.rs
index c08a2c1f477..e6a8b90ea33 100644
--- a/src/libstd/old_io/mem.rs
+++ b/src/libstd/old_io/mem.rs
@@ -102,6 +102,7 @@ impl MemWriter {
 
 impl Writer for MemWriter {
     #[inline]
+    #[allow(deprecated)]
     fn write_all(&mut self, buf: &[u8]) -> IoResult<()> {
         self.buf.push_all(buf);
         Ok(())