Add tracking issue

Author: a1phyr

library/std/src/io/cursor.rs

@@ -94,7 +94,7 @@ impl<T> Cursor<T> {
     /// # force_inference(&buff);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_unstable(feature = "const_io_structs", issue = "none")]
+    #[rustc_const_unstable(feature = "const_io_structs", issue = "78812")]
     pub const fn new(inner: T) -> Cursor<T> {
         Cursor { pos: 0, inner }
     }
@@ -131,7 +131,7 @@ impl<T> Cursor<T> {
     /// let reference = buff.get_ref();
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_unstable(feature = "const_io_structs", issue = "none")]
+    #[rustc_const_unstable(feature = "const_io_structs", issue = "78812")]
     pub const fn get_ref(&self) -> &T {
         &self.inner
     }
@@ -177,7 +177,7 @@ impl<T> Cursor<T> {
     /// assert_eq!(buff.position(), 1);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_unstable(feature = "const_io_structs", issue = "none")]
+    #[rustc_const_unstable(feature = "const_io_structs", issue = "78812")]
     pub const fn position(&self) -> u64 {
         self.pos
     }

library/std/src/io/util.rs

@@ -102,7 +102,7 @@ pub struct Empty {
 /// assert!(buffer.is_empty());
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
-#[rustc_const_unstable(feature = "const_io_structs", issue = "none")]
+#[rustc_const_unstable(feature = "const_io_structs", issue = "78812")]
 pub const fn empty() -> Empty {
     Empty { _priv: () }
 }
@@ -160,7 +160,7 @@ pub struct Repeat {
 /// assert_eq!(buffer, [0b101, 0b101, 0b101]);
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
-#[rustc_const_unstable(feature = "const_io_structs", issue = "none")]
+#[rustc_const_unstable(feature = "const_io_structs", issue = "78812")]
 pub const fn repeat(byte: u8) -> Repeat {
     Repeat { byte }
 }
@@ -228,7 +228,7 @@ pub struct Sink {
 /// assert_eq!(num_bytes, 5);
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
-#[rustc_const_unstable(feature = "const_io_structs", issue = "none")]
+#[rustc_const_unstable(feature = "const_io_structs", issue = "78812")]
 pub const fn sink() -> Sink {
     Sink { _priv: () }
 }