core::iter::Iterator::flatten: tracking issue is rust-lang#48213

Author: Centril

src/libcore/iter/iterator.rs

@@ -1075,7 +1075,7 @@ pub trait Iterator {
     /// assert_eq!(merged, "alphabetagamma");
     /// ```
     #[inline]
-    #[unstable(feature = "iterator_flatten", issue = "0")]
+    #[unstable(feature = "iterator_flatten", issue = "48213")]
     fn flatten(self) -> Flatten<Self>
     where Self: Sized, Self::Item: IntoIterator {
         Flatten { inner: flatten_compat(self) }

src/libcore/iter/mod.rs

@@ -2494,13 +2494,13 @@ impl<I, U, F> FusedIterator for FlatMap<I, U, F>
 /// [`flatten`]: trait.Iterator.html#method.flatten
 /// [`Iterator`]: trait.Iterator.html
 #[must_use = "iterator adaptors are lazy and do nothing unless consumed"]
-#[unstable(feature = "iterator_flatten", issue = "0")]
+#[unstable(feature = "iterator_flatten", issue = "48213")]
 pub struct Flatten<I: Iterator>
 where I::Item: IntoIterator {
     inner: FlattenCompat<I, <I::Item as IntoIterator>::IntoIter>,
 }
 
-#[unstable(feature = "iterator_flatten", issue = "0")]
+#[unstable(feature = "iterator_flatten", issue = "48213")]
 impl<I, U> fmt::Debug for Flatten<I>
     where I: Iterator + fmt::Debug, U: Iterator + fmt::Debug,
           I::Item: IntoIterator<IntoIter = U, Item = U::Item>,
@@ -2510,15 +2510,15 @@ impl<I, U> fmt::Debug for Flatten<I>
     }
 }
 
-#[unstable(feature = "iterator_flatten", issue = "0")]
+#[unstable(feature = "iterator_flatten", issue = "48213")]
 impl<I, U> Clone for Flatten<I>
     where I: Iterator + Clone, U: Iterator + Clone,
           I::Item: IntoIterator<IntoIter = U, Item = U::Item>,
 {
     fn clone(&self) -> Self { Flatten { inner: self.inner.clone() } }
 }
 
-#[unstable(feature = "iterator_flatten", issue = "0")]
+#[unstable(feature = "iterator_flatten", issue = "48213")]
 impl<I, U> Iterator for Flatten<I>
     where I: Iterator, U: Iterator,
           I::Item: IntoIterator<IntoIter = U, Item = U::Item>
@@ -2546,7 +2546,7 @@ impl<I, U> Iterator for Flatten<I>
     }
 }
 
-#[unstable(feature = "iterator_flatten", issue = "0")]
+#[unstable(feature = "iterator_flatten", issue = "48213")]
 impl<I, U> DoubleEndedIterator for Flatten<I>
     where I: DoubleEndedIterator, U: DoubleEndedIterator,
           I::Item: IntoIterator<IntoIter = U, Item = U::Item>