Drop tokens in order instead of reversed order

Author: dtolnay

src/fallback.rs

@@ -127,11 +127,11 @@ impl Drop for TokenStream {
     fn drop(&mut self) {
         let mut stack = Vec::new();
         let mut current = match self.inner.get_mut() {
-            Some(inner) => inner.take(),
+            Some(inner) => inner.take().into_iter(),
             None => return,
         };
         loop {
-            while let Some(token) = current.pop() {
+            while let Some(token) = current.next() {
                 let group = match token {
                     TokenTree::Group(group) => group.inner,
                     _ => continue,
@@ -144,7 +144,7 @@ impl Drop for TokenStream {
                 let mut group = group;
                 if let Some(inner) = group.stream.inner.get_mut() {
                     stack.push(current);
-                    current = inner.take();
+                    current = inner.take().into_iter();
                 }
             }
             match stack.pop() {

src/rcvec.rs

@@ -80,10 +80,6 @@ impl<T> RcVecBuilder<T> {
         self.inner.extend(iter);
     }
 
-    pub(crate) fn pop(&mut self) -> Option<T> {
-        self.inner.pop()
-    }
-
     pub(crate) fn as_mut(&mut self) -> RcVecMut<T> {
         RcVecMut {
             inner: &mut self.inner,