Specify the tracking issue

Author: Stjepan Glavina

src/libcore/time.rs

@@ -24,19 +24,19 @@ const MICROS_PER_SEC: u64 = 1_000_000;
 const MAX_NANOS_F64: f64 = ((u64::MAX as u128 + 1)*(NANOS_PER_SEC as u128)) as f64;
 
 /// The duration of one second.
-#[unstable(feature = "duration_constants", issue = "0")]
+#[unstable(feature = "duration_constants", issue = "57391")]
 pub const SECOND: Duration = Duration::from_secs(1);
 
 /// The duration of one millisecond.
-#[unstable(feature = "duration_constants", issue = "0")]
+#[unstable(feature = "duration_constants", issue = "57391")]
 pub const MILLISECOND: Duration = Duration::from_millis(1);
 
 /// The duration of one microsecond.
-#[unstable(feature = "duration_constants", issue = "0")]
+#[unstable(feature = "duration_constants", issue = "57391")]
 pub const MICROSECOND: Duration = Duration::from_micros(1);
 
 /// The duration of one nanosecond.
-#[unstable(feature = "duration_constants", issue = "0")]
+#[unstable(feature = "duration_constants", issue = "57391")]
 pub const NANOSECOND: Duration = Duration::from_nanos(1);
 
 /// A `Duration` type to represent a span of time, typically used for system

src/libstd/time.rs

@@ -21,7 +21,7 @@ use sys_common::FromInner;
 #[stable(feature = "time", since = "1.3.0")]
 pub use core::time::Duration;
 
-#[unstable(feature = "duration_constants", issue = "0")]
+#[unstable(feature = "duration_constants", issue = "57391")]
 pub use core::time::{SECOND, MILLISECOND, MICROSECOND, NANOSECOND};
 
 /// A measurement of a monotonically nondecreasing clock.