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-rw-r--r--src/libstd/sys/wasm/io.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstd/sys/wasm/io.rs b/src/libstd/sys/wasm/io.rs
index 976e122463d..d5f475b4310 100644
--- a/src/libstd/sys/wasm/io.rs
+++ b/src/libstd/sys/wasm/io.rs
@@ -1,5 +1,6 @@
 use crate::mem;
 
+#[derive(Copy, Clone)]
 pub struct IoSlice<'a>(&'a [u8]);
 
 impl<'a> IoSlice<'a> {