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-rw-r--r--src/liballoc/boxed.rs3
1 files changed, 1 insertions, 2 deletions
diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index 4293b4765e1..3239677fc0c 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -80,11 +80,10 @@ use core::raw::{TraitObject};
 /// use std::boxed::HEAP;
 ///
 /// fn main() {
-///     let foo = box(HEAP) 5;
+///     let foo: Box<i32> = in HEAP { 5 };
 ///     let foo = box 5;
 /// }
 /// ```
-#[lang = "exchange_heap"]
 #[unstable(feature = "box_heap",
            reason = "may be renamed; uncertain about custom allocator design",
            issue = "27779")]