Snap cfgs to new beta

26 files changed, 16 insertions, 105 deletions

diff --git a/src/liballoc/alloc.rs b/src/liballoc/alloc.rs
index a39fcd5ad4c..9bc76f51570 100644
--- a/src/liballoc/alloc.rs
+++ b/src/liballoc/alloc.rs
@@ -240,7 +240,6 @@ pub(crate) unsafe fn box_free<T: ?Sized>(ptr: Unique<T>) {
 #[stable(feature = "global_alloc", since = "1.28.0")]
 #[rustc_allocator_nounwind]
 pub fn handle_alloc_error(layout: Layout) -> ! {
-    #[cfg_attr(bootstrap, allow(improper_ctypes))]
     extern "Rust" {
         #[lang = "oom"]
         fn oom_impl(layout: Layout) -> !;
diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs
index 9e6ed92ffb5..247cd9a0201 100644
--- a/src/liballoc/lib.rs
+++ b/src/liballoc/lib.rs
@@ -117,7 +117,6 @@
 #![feature(allocator_internals)]
 #![feature(on_unimplemented)]
 #![feature(rustc_const_unstable)]
-#![cfg_attr(bootstrap, feature(const_vec_new))]
 #![feature(slice_partition_dedup)]
 #![feature(maybe_uninit_extra, maybe_uninit_slice)]
 #![feature(alloc_layout_extra)]
diff --git a/src/liballoc/string.rs b/src/liballoc/string.rs
index e5f96ada6d5..abe50fdb7a3 100644
--- a/src/liballoc/string.rs
+++ b/src/liballoc/string.rs
@@ -369,7 +369,6 @@ impl String {
     /// ```
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[cfg_attr(bootstrap, rustc_const_unstable(feature = "const_string_new"))]
     pub const fn new() -> String {
         String { vec: Vec::new() }
     }
diff --git a/src/liballoc/vec.rs b/src/liballoc/vec.rs
index 405969a550b..e5672f8542f 100644
--- a/src/liballoc/vec.rs
+++ b/src/liballoc/vec.rs
@@ -291,7 +291,7 @@ use crate::raw_vec::RawVec;
 /// [`reserve`]: ../../std/vec/struct.Vec.html#method.reserve
 /// [owned slice]: ../../std/boxed/struct.Box.html
 #[stable(feature = "rust1", since = "1.0.0")]
-#[cfg_attr(all(not(bootstrap), not(test)), rustc_diagnostic_item = "vec_type")]
+#[cfg_attr(not(test), rustc_diagnostic_item = "vec_type")]
 pub struct Vec<T> {
     buf: RawVec<T>,
     len: usize,
@@ -314,7 +314,6 @@ impl<T> Vec<T> {
     /// ```
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[cfg_attr(bootstrap, rustc_const_unstable(feature = "const_vec_new"))]
     pub const fn new() -> Vec<T> {
         Vec {
             buf: RawVec::NEW,
diff --git a/src/libcore/bool.rs b/src/libcore/bool.rs
index f751ccb4280..617bdd238f4 100644
--- a/src/libcore/bool.rs
+++ b/src/libcore/bool.rs
@@ -1,6 +1,5 @@
 //! impl bool {}
 
-#[cfg(not(bootstrap))]
 #[lang = "bool"]
 impl bool {
     /// Returns `Some(t)` if the `bool` is `true`, or `None` otherwise.
diff --git a/src/libcore/clone.rs b/src/libcore/clone.rs
index 6bdae1b557d..14d947ccf24 100644
--- a/src/libcore/clone.rs
+++ b/src/libcore/clone.rs
@@ -135,7 +135,6 @@ pub trait Clone : Sized {
 
 /// Derive macro generating an impl of the trait `Clone`.
 #[rustc_builtin_macro]
-#[cfg_attr(bootstrap, rustc_macro_transparency = "semitransparent")]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
 #[allow_internal_unstable(core_intrinsics, derive_clone_copy)]
 pub macro Clone($item:item) { /* compiler built-in */ }
diff --git a/src/libcore/cmp.rs b/src/libcore/cmp.rs
index fc7329f57d4..d0ea75c7623 100644
--- a/src/libcore/cmp.rs
+++ b/src/libcore/cmp.rs
@@ -210,7 +210,6 @@ pub trait PartialEq<Rhs: ?Sized = Self> {
 
 /// Derive macro generating an impl of the trait `PartialEq`.
 #[rustc_builtin_macro]
-#[cfg_attr(bootstrap, rustc_macro_transparency = "semitransparent")]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
 #[allow_internal_unstable(core_intrinsics)]
 pub macro PartialEq($item:item) { /* compiler built-in */ }
@@ -273,7 +272,6 @@ pub trait Eq: PartialEq<Self> {
 
 /// Derive macro generating an impl of the trait `Eq`.
 #[rustc_builtin_macro]
-#[cfg_attr(bootstrap, rustc_macro_transparency = "semitransparent")]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
 #[allow_internal_unstable(core_intrinsics, derive_eq)]
 pub macro Eq($item:item) { /* compiler built-in */ }
@@ -624,7 +622,6 @@ pub trait Ord: Eq + PartialOrd<Self> {
 
 /// Derive macro generating an impl of the trait `Ord`.
 #[rustc_builtin_macro]
-#[cfg_attr(bootstrap, rustc_macro_transparency = "semitransparent")]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
 #[allow_internal_unstable(core_intrinsics)]
 pub macro Ord($item:item) { /* compiler built-in */ }
@@ -873,7 +870,6 @@ pub trait PartialOrd<Rhs: ?Sized = Self>: PartialEq<Rhs> {
 
 /// Derive macro generating an impl of the trait `PartialOrd`.
 #[rustc_builtin_macro]
-#[cfg_attr(bootstrap, rustc_macro_transparency = "semitransparent")]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
 #[allow_internal_unstable(core_intrinsics)]
 pub macro PartialOrd($item:item) { /* compiler built-in */ }
diff --git a/src/libcore/default.rs b/src/libcore/default.rs
index 806d4783107..1aadc77cfb8 100644
--- a/src/libcore/default.rs
+++ b/src/libcore/default.rs
@@ -117,7 +117,6 @@ pub trait Default: Sized {
 
 /// Derive macro generating an impl of the trait `Default`.
 #[rustc_builtin_macro]
-#[cfg_attr(bootstrap, rustc_macro_transparency = "semitransparent")]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
 #[allow_internal_unstable(core_intrinsics)]
 pub macro Default($item:item) { /* compiler built-in */ }
diff --git a/src/libcore/fmt/mod.rs b/src/libcore/fmt/mod.rs
index 65e2f8b9be6..aafa35873bb 100644
--- a/src/libcore/fmt/mod.rs
+++ b/src/libcore/fmt/mod.rs
@@ -518,8 +518,7 @@ impl Display for Arguments<'_> {
     label="`{Self}` cannot be formatted using `{{:?}}` because it doesn't implement `{Debug}`",
 )]
 #[doc(alias = "{:?}")]
-#[cfg_attr(bootstrap, lang = "debug_trait")]
-#[cfg_attr(not(bootstrap), rustc_diagnostic_item = "debug_trait")]
+#[rustc_diagnostic_item = "debug_trait"]
 pub trait Debug {
     /// Formats the value using the given formatter.
     ///
@@ -550,7 +549,6 @@ pub trait Debug {
 pub(crate) mod macros {
     /// Derive macro generating an impl of the trait `Debug`.
     #[rustc_builtin_macro]
-    #[cfg_attr(bootstrap, rustc_macro_transparency = "semitransparent")]
     #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
     #[allow_internal_unstable(core_intrinsics)]
     pub macro Debug($item:item) { /* compiler built-in */ }
diff --git a/src/libcore/hash/mod.rs b/src/libcore/hash/mod.rs
index aaaa6f9c575..020e085abf8 100644
--- a/src/libcore/hash/mod.rs
+++ b/src/libcore/hash/mod.rs
@@ -202,7 +202,6 @@ pub trait Hash {
 pub(crate) mod macros {
     /// Derive macro generating an impl of the trait `Hash`.
     #[rustc_builtin_macro]
-    #[cfg_attr(bootstrap, rustc_macro_transparency = "semitransparent")]
     #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
     #[allow_internal_unstable(core_intrinsics)]
     pub macro Hash($item:item) { /* compiler built-in */ }
diff --git a/src/libcore/intrinsics.rs b/src/libcore/intrinsics.rs
index 905375eb60f..b240d059114 100644
--- a/src/libcore/intrinsics.rs
+++ b/src/libcore/intrinsics.rs
@@ -1299,38 +1299,16 @@ extern "rust-intrinsic" {
     /// The stabilized versions of this intrinsic are available on the integer
     /// primitives via the `wrapping_add` method. For example,
     /// [`std::u32::wrapping_add`](../../std/primitive.u32.html#method.wrapping_add)
-    #[cfg(bootstrap)]
-    pub fn overflowing_add<T>(a: T, b: T) -> T;
-    /// Returns (a - b) mod 2<sup>N</sup>, where N is the width of T in bits.
-    /// The stabilized versions of this intrinsic are available on the integer
-    /// primitives via the `wrapping_sub` method. For example,
-    /// [`std::u32::wrapping_sub`](../../std/primitive.u32.html#method.wrapping_sub)
-    #[cfg(bootstrap)]
-    pub fn overflowing_sub<T>(a: T, b: T) -> T;
-    /// Returns (a * b) mod 2<sup>N</sup>, where N is the width of T in bits.
-    /// The stabilized versions of this intrinsic are available on the integer
-    /// primitives via the `wrapping_mul` method. For example,
-    /// [`std::u32::wrapping_mul`](../../std/primitive.u32.html#method.wrapping_mul)
-    #[cfg(bootstrap)]
-    pub fn overflowing_mul<T>(a: T, b: T) -> T;
-
-    /// Returns (a + b) mod 2<sup>N</sup>, where N is the width of T in bits.
-    /// The stabilized versions of this intrinsic are available on the integer
-    /// primitives via the `wrapping_add` method. For example,
-    /// [`std::u32::wrapping_add`](../../std/primitive.u32.html#method.wrapping_add)
-    #[cfg(not(bootstrap))]
     pub fn wrapping_add<T>(a: T, b: T) -> T;
     /// Returns (a - b) mod 2<sup>N</sup>, where N is the width of T in bits.
     /// The stabilized versions of this intrinsic are available on the integer
     /// primitives via the `wrapping_sub` method. For example,
     /// [`std::u32::wrapping_sub`](../../std/primitive.u32.html#method.wrapping_sub)
-    #[cfg(not(bootstrap))]
     pub fn wrapping_sub<T>(a: T, b: T) -> T;
     /// Returns (a * b) mod 2<sup>N</sup>, where N is the width of T in bits.
     /// The stabilized versions of this intrinsic are available on the integer
     /// primitives via the `wrapping_mul` method. For example,
     /// [`std::u32::wrapping_mul`](../../std/primitive.u32.html#method.wrapping_mul)
-    #[cfg(not(bootstrap))]
     pub fn wrapping_mul<T>(a: T, b: T) -> T;
 
     /// Computes `a + b`, while saturating at numeric bounds.
diff --git a/src/libcore/lib.rs b/src/libcore/lib.rs
index 8221df56a51..e8c76b49a8e 100644
--- a/src/libcore/lib.rs
+++ b/src/libcore/lib.rs
@@ -87,7 +87,6 @@
 #![feature(link_llvm_intrinsics)]
 #![feature(never_type)]
 #![feature(nll)]
-#![cfg_attr(bootstrap, feature(bind_by_move_pattern_guards))]
 #![feature(exhaustive_patterns)]
 #![feature(no_core)]
 #![feature(on_unimplemented)]
@@ -120,9 +119,6 @@
 #![feature(rtm_target_feature)]
 #![feature(f16c_target_feature)]
 #![feature(hexagon_target_feature)]
-#![cfg_attr(bootstrap, feature(const_slice_len))]
-#![cfg_attr(bootstrap, feature(const_str_as_bytes))]
-#![cfg_attr(bootstrap, feature(const_str_len))]
 #![feature(const_int_conversion)]
 #![feature(const_transmute)]
 #![feature(non_exhaustive)]
diff --git a/src/libcore/macros.rs b/src/libcore/macros.rs
index c6f5fb0b163..ef91c3559d8 100644
--- a/src/libcore/macros.rs
+++ b/src/libcore/macros.rs
@@ -1236,10 +1236,8 @@ pub(crate) mod builtin {
     pub macro test($item:item) { /* compiler built-in */ }
 
     /// Attribute macro applied to a function to turn it into a benchmark test.
-    #[cfg_attr(not(bootstrap), unstable(soft, feature = "test", issue = "50297",
-               reason = "`bench` is a part of custom test frameworks which are unstable"))]
-    #[cfg_attr(bootstrap, unstable(feature = "test", issue = "50297",
-               reason = "`bench` is a part of custom test frameworks which are unstable"))]
+    #[unstable(soft, feature = "test", issue = "50297",
+               reason = "`bench` is a part of custom test frameworks which are unstable")]
     #[allow_internal_unstable(test, rustc_attrs)]
     #[rustc_builtin_macro]
     pub macro bench($item:item) { /* compiler built-in */ }
diff --git a/src/libcore/marker.rs b/src/libcore/marker.rs
index a2cfb320e76..7f3d958f5dc 100644
--- a/src/libcore/marker.rs
+++ b/src/libcore/marker.rs
@@ -290,7 +290,6 @@ pub trait Copy : Clone {
 
 /// Derive macro generating an impl of the trait `Copy`.
 #[rustc_builtin_macro]
-#[cfg_attr(bootstrap, rustc_macro_transparency = "semitransparent")]
 #[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
 #[allow_internal_unstable(core_intrinsics, derive_clone_copy)]
 pub macro Copy($item:item) { /* compiler built-in */ }
diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index 5d99c10e738..e9b4efd9c21 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -1112,13 +1112,7 @@ $EndFeature, "
                           without modifying the original"]
             #[inline]
             pub const fn wrapping_add(self, rhs: Self) -> Self {
-                #[cfg(bootstrap)] {
-                    intrinsics::overflowing_add(self, rhs)
-                }
-
-                #[cfg(not(bootstrap))] {
-                    intrinsics::wrapping_add(self, rhs)
-                }
+                intrinsics::wrapping_add(self, rhs)
             }
         }
 
@@ -1141,13 +1135,7 @@ $EndFeature, "
                           without modifying the original"]
             #[inline]
             pub const fn wrapping_sub(self, rhs: Self) -> Self {
-                #[cfg(bootstrap)] {
-                    intrinsics::overflowing_sub(self, rhs)
-                }
-
-                #[cfg(not(bootstrap))] {
-                    intrinsics::wrapping_sub(self, rhs)
-                }
+                intrinsics::wrapping_sub(self, rhs)
             }
         }
 
@@ -1169,13 +1157,7 @@ $EndFeature, "
                           without modifying the original"]
             #[inline]
             pub const fn wrapping_mul(self, rhs: Self) -> Self {
-                #[cfg(bootstrap)] {
-                    intrinsics::overflowing_mul(self, rhs)
-                }
-
-                #[cfg(not(bootstrap))] {
-                    intrinsics::wrapping_mul(self, rhs)
-                }
+                intrinsics::wrapping_mul(self, rhs)
             }
         }
 
@@ -3040,13 +3022,7 @@ $EndFeature, "
                           without modifying the original"]
             #[inline]
             pub const fn wrapping_add(self, rhs: Self) -> Self {
-                #[cfg(bootstrap)] {
-                    intrinsics::overflowing_add(self, rhs)
-                }
-
-                #[cfg(not(bootstrap))] {
-                    intrinsics::wrapping_add(self, rhs)
-                }
+                intrinsics::wrapping_add(self, rhs)
             }
         }
 
@@ -3068,13 +3044,7 @@ $EndFeature, "
                           without modifying the original"]
             #[inline]
             pub const fn wrapping_sub(self, rhs: Self) -> Self {
-                #[cfg(bootstrap)] {
-                    intrinsics::overflowing_sub(self, rhs)
-                }
-
-                #[cfg(not(bootstrap))] {
-                    intrinsics::wrapping_sub(self, rhs)
-                }
+                intrinsics::wrapping_sub(self, rhs)
             }
         }
 
@@ -3097,13 +3067,7 @@ $EndFeature, "
                           without modifying the original"]
         #[inline]
         pub const fn wrapping_mul(self, rhs: Self) -> Self {
-            #[cfg(bootstrap)] {
-                intrinsics::overflowing_mul(self, rhs)
-            }
-
-            #[cfg(not(bootstrap))] {
-                intrinsics::wrapping_mul(self, rhs)
-            }
+            intrinsics::wrapping_mul(self, rhs)
         }
 
         doc_comment! {
diff --git a/src/libcore/panicking.rs b/src/libcore/panicking.rs
index 7b7253419b1..e8f0561604a 100644
--- a/src/libcore/panicking.rs
+++ b/src/libcore/panicking.rs
@@ -71,7 +71,6 @@ pub fn panic_fmt(fmt: fmt::Arguments<'_>, file_line_col: &(&'static str, u32, u3
     }
 
     // NOTE This function never crosses the FFI boundary; it's a Rust-to-Rust call
-    #[cfg_attr(bootstrap, allow(improper_ctypes))]
     extern "Rust" {
         #[lang = "panic_impl"]
         fn panic_impl(pi: &PanicInfo<'_>) -> !;
diff --git a/src/libcore/slice/mod.rs b/src/libcore/slice/mod.rs
index 0c2a4e08672..5ec21e6d928 100644
--- a/src/libcore/slice/mod.rs
+++ b/src/libcore/slice/mod.rs
@@ -62,9 +62,8 @@ impl<T> [T] {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
-    #[cfg_attr(bootstrap, rustc_const_unstable(feature = "const_slice_len"))]
     // SAFETY: const sound because we transmute out the length field as a usize (which it must be)
-    #[cfg_attr(not(bootstrap), allow_internal_unstable(const_fn_union))]
+    #[allow_internal_unstable(const_fn_union)]
     pub const fn len(&self) -> usize {
         unsafe {
             crate::ptr::Repr { rust: self }.raw.len
@@ -81,7 +80,6 @@ impl<T> [T] {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
-    #[cfg_attr(bootstrap, rustc_const_unstable(feature = "const_slice_len"))]
     pub const fn is_empty(&self) -> bool {
         self.len() == 0
     }
diff --git a/src/libcore/str/mod.rs b/src/libcore/str/mod.rs
index a6ec757faf1..ece61dde490 100644
--- a/src/libcore/str/mod.rs
+++ b/src/libcore/str/mod.rs
@@ -2090,7 +2090,6 @@ impl str {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
-    #[cfg_attr(bootstrap, rustc_const_unstable(feature = "const_str_len"))]
     pub const fn len(&self) -> usize {
         self.as_bytes().len()
     }
@@ -2110,7 +2109,6 @@ impl str {
     /// ```
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[cfg_attr(bootstrap, rustc_const_unstable(feature = "const_str_len"))]
     pub const fn is_empty(&self) -> bool {
         self.len() == 0
     }
@@ -2168,9 +2166,8 @@ impl str {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline(always)]
-    #[cfg_attr(bootstrap, rustc_const_unstable(feature = "const_str_as_bytes"))]
     // SAFETY: const sound because we transmute two types with the same layout
-    #[cfg_attr(not(bootstrap), allow_internal_unstable(const_fn_union))]
+    #[allow_internal_unstable(const_fn_union)]
     pub const fn as_bytes(&self) -> &[u8] {
         #[repr(C)]
         union Slices<'a> {
diff --git a/src/libproc_macro/lib.rs b/src/libproc_macro/lib.rs
index d408fef7515..d5cdc266acb 100644
--- a/src/libproc_macro/lib.rs
+++ b/src/libproc_macro/lib.rs
@@ -227,7 +227,7 @@ pub mod token_stream {
 /// To quote `$` itself, use `$$`.
 #[unstable(feature = "proc_macro_quote", issue = "54722")]
 #[allow_internal_unstable(proc_macro_def_site)]
-#[cfg_attr(not(bootstrap), rustc_builtin_macro)]
+#[rustc_builtin_macro]
 pub macro quote ($($t:tt)*) { /* compiler built-in */ }
 
 #[unstable(feature = "proc_macro_internals", issue = "27812")]
diff --git a/src/librustc/ty/context.rs b/src/librustc/ty/context.rs
index c03dbb2b1ed..a25ef21d697 100644
--- a/src/librustc/ty/context.rs
+++ b/src/librustc/ty/context.rs
@@ -974,7 +974,7 @@ pub struct FreeRegionInfo {
 ///
 /// [rustc guide]: https://rust-lang.github.io/rustc-guide/ty.html
 #[derive(Copy, Clone)]
-#[cfg_attr(not(bootstrap), rustc_diagnostic_item = "TyCtxt")]
+#[rustc_diagnostic_item = "TyCtxt"]
 pub struct TyCtxt<'tcx> {
     gcx: &'tcx GlobalCtxt<'tcx>,
 }
diff --git a/src/librustc/ty/mod.rs b/src/librustc/ty/mod.rs
index ef8bdfb583e..61483fa8a49 100644
--- a/src/librustc/ty/mod.rs
+++ b/src/librustc/ty/mod.rs
@@ -581,7 +581,7 @@ impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for ty::TyS<'tcx> {
     }
 }
 
-#[cfg_attr(not(bootstrap), rustc_diagnostic_item = "Ty")]
+#[rustc_diagnostic_item = "Ty"]
 pub type Ty<'tcx> = &'tcx TyS<'tcx>;
 
 impl<'tcx> rustc_serialize::UseSpecializedEncodable for Ty<'tcx> {}
diff --git a/src/librustc/ty/sty.rs b/src/librustc/ty/sty.rs
index e73a51e6f78..036f41a4043 100644
--- a/src/librustc/ty/sty.rs
+++ b/src/librustc/ty/sty.rs
@@ -86,7 +86,7 @@ impl BoundRegion {
 /// AST structure in `libsyntax/ast.rs` as well.
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash,
          RustcEncodable, RustcDecodable, HashStable, Debug)]
-#[cfg_attr(not(bootstrap), rustc_diagnostic_item = "TyKind")]
+#[rustc_diagnostic_item = "TyKind"]
 pub enum TyKind<'tcx> {
     /// The primitive boolean type. Written as `bool`.
     Bool,
diff --git a/src/librustc_passes/lib.rs b/src/librustc_passes/lib.rs
index a5a8315a1e7..4e29706714f 100644
--- a/src/librustc_passes/lib.rs
+++ b/src/librustc_passes/lib.rs
@@ -8,7 +8,6 @@
 
 #![feature(in_band_lifetimes)]
 #![feature(nll)]
-#![cfg_attr(bootstrap, feature(bind_by_move_pattern_guards))]
 
 #![recursion_limit="256"]
 
diff --git a/src/librustdoc/lib.rs b/src/librustdoc/lib.rs
index 0b9e717221f..2985e7f70b5 100644
--- a/src/librustdoc/lib.rs
+++ b/src/librustdoc/lib.rs
@@ -1,7 +1,6 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/",
        html_playground_url = "https://play.rust-lang.org/")]
 
-#![cfg_attr(bootstrap, feature(bind_by_move_pattern_guards))]
 #![feature(rustc_private)]
 #![feature(arbitrary_self_types)]
 #![feature(box_patterns)]
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index 21aeb9c26f8..5d9683f8ded 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -238,7 +238,6 @@
 #![feature(array_error_internals)]
 #![feature(asm)]
 #![feature(associated_type_bounds)]
-#![cfg_attr(bootstrap, feature(bind_by_move_pattern_guards))]
 #![feature(box_syntax)]
 #![feature(c_variadic)]
 #![feature(cfg_target_has_atomic)]
diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index b0833010fe0..2c10220c766 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -7,7 +7,6 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/",
        test(attr(deny(warnings))))]
 
-#![cfg_attr(bootstrap, feature(bind_by_move_pattern_guards))]
 #![feature(box_syntax)]
 #![feature(const_fn)]
 #![feature(const_transmute)]