Add the tracking issue for #![feature(iter_zip)]

Author: cuviper

library/core/src/iter/adapters/mod.rs

@@ -51,7 +51,7 @@ pub use self::map_while::MapWhile;
 #[unstable(feature = "trusted_random_access", issue = "none")]
 pub use self::zip::TrustedRandomAccess;
 
-#[unstable(feature = "iter_zip", issue = "none")]
+#[unstable(feature = "iter_zip", issue = "83574")]
 pub use self::zip::zip;
 
 /// This trait provides transitive access to source-stage in an interator-adapter pipeline

library/core/src/iter/adapters/zip.rs

@@ -55,7 +55,7 @@ impl<A: Iterator, B: Iterator> Zip<A, B> {
 ///     println!("x:{}, y:{}, z:{}", x, y, z);
 /// }
 /// ```
-#[unstable(feature = "iter_zip", issue = "none")]
+#[unstable(feature = "iter_zip", issue = "83574")]
 pub fn zip<A, B>(a: A, b: B) -> Zip<A::IntoIter, B::IntoIter>
 where
     A: IntoIterator,

library/core/src/iter/mod.rs

@@ -389,7 +389,7 @@ pub use self::traits::{
     DoubleEndedIterator, ExactSizeIterator, Extend, FromIterator, IntoIterator, Product, Sum,
 };
 
-#[unstable(feature = "iter_zip", issue = "none")]
+#[unstable(feature = "iter_zip", issue = "83574")]
 pub use self::adapters::zip;
 #[stable(feature = "iter_cloned", since = "1.1.0")]
 pub use self::adapters::Cloned;