From d23b9b471d2f81fb5687ddc3cefebcfff9c6267e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20Kr=C3=BCger?= <matthias.krueger@famsik.de>
Date: Tue, 15 May 2018 10:10:05 +0200
Subject: [PATCH] mark std::string::String::new() and std::vec::Vec::new() as
 #[must_use].

---
 src/liballoc/string.rs | 1 +
 src/liballoc/vec.rs    | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/liballoc/string.rs b/src/liballoc/string.rs
index da9afdd2ca37b..663e1ac915dbf 100644
--- a/src/liballoc/string.rs
+++ b/src/liballoc/string.rs
@@ -378,6 +378,7 @@ impl String {
     /// ```
     /// let s = String::new();
     /// ```
+    #[must_use = "newly created String must be used"]
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_const_unstable(feature = "const_string_new")]
diff --git a/src/liballoc/vec.rs b/src/liballoc/vec.rs
index 690cbcb559bbf..312aad361041e 100644
--- a/src/liballoc/vec.rs
+++ b/src/liballoc/vec.rs
@@ -320,6 +320,7 @@ impl<T> Vec<T> {
     /// # #![allow(unused_mut)]
     /// let mut vec: Vec<i32> = Vec::new();
     /// ```
+    #[must_use = "newly created vector must be used"]
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_const_unstable(feature = "const_vec_new")]