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-rw-r--r--src/liballoc/arc.rs4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/liballoc/arc.rs b/src/liballoc/arc.rs
index f3b72e4a9ee..338d7e33631 100644
--- a/src/liballoc/arc.rs
+++ b/src/liballoc/arc.rs
@@ -33,7 +33,7 @@
 //!
 //! Sharing some immutable data between tasks:
 //!
-//! ```
+//! ```no_run
 //! use std::sync::Arc;
 //! use std::thread;
 //!
@@ -50,7 +50,7 @@
 //!
 //! Sharing mutable data safely between tasks with a `Mutex`:
 //!
-//! ```
+//! ```no_run
 //! use std::sync::{Arc, Mutex};
 //! use std::thread;
 //!