From b44ae964e2086b280a250dea62abad29164eea58 Mon Sep 17 00:00:00 2001
From: Mara Bos <m-ou.se@m-ou.se>
Date: Sun, 11 Apr 2021 11:36:35 +0200
Subject: [PATCH] Mark Duration::is_zero as rustc_const_stable.

---
 library/core/src/time.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/library/core/src/time.rs b/library/core/src/time.rs
index f6d480ae54b38..fa6a6c2cccc01 100644
--- a/library/core/src/time.rs
+++ b/library/core/src/time.rs
@@ -280,6 +280,7 @@ impl Duration {
     /// assert!(!Duration::from_secs(1).is_zero());
     /// ```
     #[stable(feature = "duration_zero", since = "1.53.0")]
+    #[rustc_const_stable(feature = "duration_zero", since = "1.53.0")]
     #[inline]
     pub const fn is_zero(&self) -> bool {
         self.secs == 0 && self.nanos == 0