diff --git a/src/libcollections/btree/set.rs b/src/libcollections/btree/set.rs
index ffca6964c5f..7b4079207d2 100644
--- a/src/libcollections/btree/set.rs
+++ b/src/libcollections/btree/set.rs
@@ -138,7 +138,8 @@ pub struct Difference<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for Difference<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("Difference")
-         .field(&self.clone())
+         .field(&self.a)
+         .field(&self.b)
          .finish()
     }
 }
@@ -160,7 +161,8 @@ pub struct SymmetricDifference<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for SymmetricDifference<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("SymmetricDifference")
-         .field(&self.clone())
+         .field(&self.a)
+         .field(&self.b)
          .finish()
     }
 }
@@ -182,7 +184,8 @@ pub struct Intersection<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for Intersection<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("Intersection")
-         .field(&self.clone())
+         .field(&self.a)
+         .field(&self.b)
          .finish()
     }
 }
@@ -204,7 +207,8 @@ pub struct Union<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for Union<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("Union")
-         .field(&self.clone())
+         .field(&self.a)
+         .field(&self.b)
          .finish()
     }
 }
diff --git a/src/libcollections/enum_set.rs b/src/libcollections/enum_set.rs
index ebee75d1a1a..aaee567bf1d 100644
--- a/src/libcollections/enum_set.rs
+++ b/src/libcollections/enum_set.rs
@@ -225,7 +225,8 @@ pub struct Iter<E> {
 impl<E: fmt::Debug> fmt::Debug for Iter<E> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("Iter")
-         .field(&self.clone())
+         .field(&self.index)
+         .field(&self.bits)
          .finish()
     }
 }
diff --git a/src/libcollections/linked_list.rs b/src/libcollections/linked_list.rs
index bfb03a5b23f..1cc5e10418f 100644
--- a/src/libcollections/linked_list.rs
+++ b/src/libcollections/linked_list.rs
@@ -75,7 +75,7 @@ pub struct Iter<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for Iter<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("Iter")
-         .field(&self.clone())
+         .field(&self.len)
          .finish()
     }
 }
@@ -107,7 +107,8 @@ pub struct IterMut<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for IterMut<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("IterMut")
-         .field(self.clone())
+         .field(&self.list)
+         .field(&self.len)
          .finish()
     }
 }
@@ -129,7 +130,7 @@ pub struct IntoIter<T> {
 impl<T: fmt::Debug> fmt::Debug for IntoIter<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("IntoIter")
-         .field(self.clone())
+         .field(&self.list)
          .finish()
     }
 }
@@ -1128,7 +1129,7 @@ pub struct FrontPlace<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for FrontPlace<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("FrontPlace")
-         .field(self.clone())
+         .field(&self.list)
          .finish()
     }
 }
@@ -1183,7 +1184,7 @@ pub struct BackPlace<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for BackPlace<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("BackPlace")
-         .field(self.clone())
+         .field(&self.list)
          .finish()
     }
 }
diff --git a/src/libcollections/vec_deque.rs b/src/libcollections/vec_deque.rs
index 2ce3b92843b..f0e61ebc47b 100644
--- a/src/libcollections/vec_deque.rs
+++ b/src/libcollections/vec_deque.rs
@@ -1913,7 +1913,9 @@ pub struct Iter<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for Iter<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("Iter")
-         .field(&self.clone())
+         .field(&self.ring)
+         .field(&self.tail)
+         .field(&self.head)
          .finish()
     }
 }
@@ -2000,7 +2002,9 @@ pub struct IterMut<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for IterMut<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("IterMut")
-         .field(&self.clone())
+         .field(&self.ring)
+         .field(&self.tail)
+         .field(&self.head)
          .finish()
     }
 }
@@ -2081,7 +2085,7 @@ pub struct IntoIter<T> {
 impl<T: fmt::Debug> fmt::Debug for IntoIter<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("IntoIter")
-         .field(&self.clone())
+         .field(&self.inner)
          .finish()
     }
 }
@@ -2139,7 +2143,9 @@ pub struct Drain<'a, T: 'a> {
 impl<'a, T: 'a + fmt::Debug> fmt::Debug for Drain<'a, T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         f.debug_tuple("Drain")
-         .field(&self.clone())
+         .field(&self.after_tail)
+         .field(&self.after_head)
+         .field(&self.iter)
          .finish()
     }
 }