Add default allocator parameters for compatibility

src/map.rs

@@ -1611,7 +1611,7 @@ pub struct RawEntryBuilderMut<'a, K, V, S, A: Allocator + Clone = Global> {
 /// [`Entry`]: enum.Entry.html
 /// [`raw_entry_mut`]: struct.HashMap.html#method.raw_entry_mut
 /// [`RawEntryBuilderMut`]: struct.RawEntryBuilderMut.html
-pub enum RawEntryMut<'a, K, V, S, A: Allocator + Clone> {
+pub enum RawEntryMut<'a, K, V, S, A: Allocator + Clone = Global> {
     /// An occupied entry.
     Occupied(RawOccupiedEntryMut<'a, K, V, S, A>),
     /// A vacant entry.

src/raw/mod.rs

@@ -389,7 +389,7 @@ impl<T> Bucket<T> {
 }
 
 /// A raw hash table with an unsafe API.
-pub struct RawTable<T, A: Allocator + Clone> {
+pub struct RawTable<T, A: Allocator + Clone = Global> {
     table: RawTableInner<A>,
     // Tell dropck that we own instances of T.
     marker: PhantomData<T>,
@@ -1879,7 +1879,7 @@ impl<T> RawIter<T> {
                             // We should not have changed what bucket comes next.
                             debug_assert_eq!(self.iter.current_group.lowest_set_bit(), Some(index));
                         }
-                    }
+                    a
                 }
             } else {
                 // We must have already iterated past the removed item.