Add tracking issue for map_try_insert.

Author: m-ou-se

library/alloc/src/collections/btree/map.rs

@@ -859,7 +859,7 @@ impl<K, V> BTreeMap<K, V> {
     /// assert_eq!(err.entry.get(), &"a");
     /// assert_eq!(err.value, "b");
     /// ```
-    #[unstable(feature = "map_try_insert", issue = "none")]
+    #[unstable(feature = "map_try_insert", issue = "82766")]
     pub fn try_insert(&mut self, key: K, value: V) -> Result<&mut V, OccupiedError<'_, K, V>>
     where
         K: Ord,

library/alloc/src/collections/btree/map/entry.rs

@@ -74,15 +74,15 @@ impl<K: Debug + Ord, V: Debug> Debug for OccupiedEntry<'_, K, V> {
 /// The error returned by [`try_insert`](BTreeMap::try_insert) when the key already exists.
 ///
 /// Contains the occupied entry, and the value that was not inserted.
-#[unstable(feature = "map_try_insert", issue = "none")]
+#[unstable(feature = "map_try_insert", issue = "82766")]
 pub struct OccupiedError<'a, K: 'a, V: 'a> {
     /// The entry in the map that was already occupied.
     pub entry: OccupiedEntry<'a, K, V>,
     /// The value which was not inserted, because the entry was already occupied.
     pub value: V,
 }
 
-#[unstable(feature = "map_try_insert", issue = "none")]
+#[unstable(feature = "map_try_insert", issue = "82766")]
 impl<K: Debug + Ord, V: Debug> Debug for OccupiedError<'_, K, V> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("OccupiedError")
@@ -93,7 +93,7 @@ impl<K: Debug + Ord, V: Debug> Debug for OccupiedError<'_, K, V> {
     }
 }
 
-#[unstable(feature = "map_try_insert", issue = "none")]
+#[unstable(feature = "map_try_insert", issue = "82766")]
 impl<'a, K: Debug + Ord, V: Debug> fmt::Display for OccupiedError<'a, K, V> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(

library/std/src/collections/hash/map.rs

@@ -867,7 +867,7 @@ where
     /// assert_eq!(err.entry.get(), &"a");
     /// assert_eq!(err.value, "b");
     /// ```
-    #[unstable(feature = "map_try_insert", issue = "none")]
+    #[unstable(feature = "map_try_insert", issue = "82766")]
     pub fn try_insert(&mut self, key: K, value: V) -> Result<&mut V, OccupiedError<'_, K, V>> {
         match self.entry(key) {
             Occupied(entry) => Err(OccupiedError { entry, value }),
@@ -1887,15 +1887,15 @@ impl<K: Debug, V> Debug for VacantEntry<'_, K, V> {
 /// The error returned by [`try_insert`](HashMap::try_insert) when the key already exists.
 ///
 /// Contains the occupied entry, and the value that was not inserted.
-#[unstable(feature = "map_try_insert", issue = "none")]
+#[unstable(feature = "map_try_insert", issue = "82766")]
 pub struct OccupiedError<'a, K: 'a, V: 'a> {
     /// The entry in the map that was already occupied.
     pub entry: OccupiedEntry<'a, K, V>,
     /// The value which was not inserted, because the entry was already occupied.
     pub value: V,
 }
 
-#[unstable(feature = "map_try_insert", issue = "none")]
+#[unstable(feature = "map_try_insert", issue = "82766")]
 impl<K: Debug, V: Debug> Debug for OccupiedError<'_, K, V> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("OccupiedError")
@@ -1906,7 +1906,7 @@ impl<K: Debug, V: Debug> Debug for OccupiedError<'_, K, V> {
     }
 }
 
-#[unstable(feature = "map_try_insert", issue = "none")]
+#[unstable(feature = "map_try_insert", issue = "82766")]
 impl<'a, K: Debug, V: Debug> fmt::Display for OccupiedError<'a, K, V> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(

library/std/src/error.rs

@@ -470,7 +470,7 @@ impl Error for char::DecodeUtf16Error {
     }
 }
 
-#[unstable(feature = "map_try_insert", issue = "none")]
+#[unstable(feature = "map_try_insert", issue = "82766")]
 impl<'a, K: Debug + Ord, V: Debug> Error
     for crate::collections::btree_map::OccupiedError<'a, K, V>
 {
@@ -480,7 +480,7 @@ impl<'a, K: Debug + Ord, V: Debug> Error
     }
 }
 
-#[unstable(feature = "map_try_insert", issue = "none")]
+#[unstable(feature = "map_try_insert", issue = "82766")]
 impl<'a, K: Debug, V: Debug> Error for crate::collections::hash_map::OccupiedError<'a, K, V> {
     #[allow(deprecated)]
     fn description(&self) -> &str {