diff --git a/src/libcore/array.rs b/src/libcore/array.rs
index 28f1da27bdb..3d24f8902bd 100644
--- a/src/libcore/array.rs
+++ b/src/libcore/array.rs
@@ -185,7 +185,6 @@ macro_rules! array_impls {
 
             #[stable(feature = "rust1", since = "1.0.0")]
             impl<T: fmt::Debug> fmt::Debug for [T; $N] {
-                #[inline]
                 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
                     fmt::Debug::fmt(&&self[..], f)
                 }
diff --git a/src/libcore/fmt/float.rs b/src/libcore/fmt/float.rs
index 24ffe8c6888..03e7a9a49d8 100644
--- a/src/libcore/fmt/float.rs
+++ b/src/libcore/fmt/float.rs
@@ -125,7 +125,6 @@ macro_rules! floating {
     ($ty:ident) => (
         #[stable(feature = "rust1", since = "1.0.0")]
         impl Debug for $ty {
-            #[inline]
             fn fmt(&self, fmt: &mut Formatter) -> Result {
                 float_to_decimal_common(fmt, self, true, 1)
             }
diff --git a/src/libcore/fmt/mod.rs b/src/libcore/fmt/mod.rs
index b4d23d153d8..6c8a1c3062b 100644
--- a/src/libcore/fmt/mod.rs
+++ b/src/libcore/fmt/mod.rs
@@ -1558,12 +1558,10 @@ macro_rules! fmt_refs {
         $(
         #[stable(feature = "rust1", since = "1.0.0")]
         impl<'a, T: ?Sized + $tr> $tr for &'a T {
-            #[inline]
             fn fmt(&self, f: &mut Formatter) -> Result { $tr::fmt(&**self, f) }
         }
         #[stable(feature = "rust1", since = "1.0.0")]
         impl<'a, T: ?Sized + $tr> $tr for &'a mut T {
-            #[inline]
             fn fmt(&self, f: &mut Formatter) -> Result { $tr::fmt(&**self, f) }
         }
         )*
@@ -1603,7 +1601,6 @@ impl Display for bool {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Debug for str {
-    #[inline]
     fn fmt(&self, f: &mut Formatter) -> Result {
         f.write_char('"')?;
         let mut from = 0;
@@ -1632,7 +1629,6 @@ impl Display for str {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Debug for char {
-    #[inline]
     fn fmt(&self, f: &mut Formatter) -> Result {
         f.write_char('\'')?;
         for c in self.escape_debug() {
@@ -1706,12 +1702,10 @@ impl<'a, T: ?Sized> Pointer for &'a mut T {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: ?Sized> Debug for *const T {
-    #[inline]
     fn fmt(&self, f: &mut Formatter) -> Result { Pointer::fmt(self, f) }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: ?Sized> Debug for *mut T {
-    #[inline]
     fn fmt(&self, f: &mut Formatter) -> Result { Pointer::fmt(self, f) }
 }
 
@@ -1725,7 +1719,6 @@ macro_rules! tuple {
         #[stable(feature = "rust1", since = "1.0.0")]
         impl<$($name:Debug),*> Debug for ($($name,)*) where last_type!($($name,)+): ?Sized {
             #[allow(non_snake_case, unused_assignments, deprecated)]
-            #[inline]
             fn fmt(&self, f: &mut Formatter) -> Result {
                 let mut builder = f.debug_tuple("");
                 let ($(ref $name,)*) = *self;
@@ -1749,7 +1742,6 @@ tuple! { T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, }
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: Debug> Debug for [T] {
-    #[inline]
     fn fmt(&self, f: &mut Formatter) -> Result {
         f.debug_list().entries(self.iter()).finish()
     }
diff --git a/src/libcore/ptr.rs b/src/libcore/ptr.rs
index 3e162afd649..fab5832d905 100644
--- a/src/libcore/ptr.rs
+++ b/src/libcore/ptr.rs
@@ -2202,7 +2202,6 @@ macro_rules! fnptr_impls_safety_abi {
 
         #[stable(feature = "fnptr_impls", since = "1.4.0")]
         impl<Ret, $($Arg),*> fmt::Debug for $FnTy {
-            #[inline]
             fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
                 fmt::Pointer::fmt(&(*self as *const ()), f)
             }