diff --git a/src/bootstrap/channel.rs b/src/bootstrap/channel.rs
index a4115904ac7..51a9b0e0a52 100644
--- a/src/bootstrap/channel.rs
+++ b/src/bootstrap/channel.rs
@@ -13,7 +13,7 @@ use build_helper::output;
 use crate::Build;
 
 // The version number
-pub const CFG_RELEASE_NUM: &str = "1.46.0";
+pub const CFG_RELEASE_NUM: &str = "1.47.0";
 
 pub struct GitInfo {
     inner: Option<Info>,
diff --git a/src/bootstrap/compile.rs b/src/bootstrap/compile.rs
index 9b4926f28d4..68a3f369d16 100644
--- a/src/bootstrap/compile.rs
+++ b/src/bootstrap/compile.rs
@@ -159,13 +159,7 @@ fn copy_self_contained_objects(
     compiler: &Compiler,
     target: Interned<String>,
 ) -> Vec<(PathBuf, DependencyType)> {
-    // cfg(bootstrap)
-    // Remove when upgrading bootstrap compiler.
-    let libdir_self_contained = if compiler.stage == 0 {
-        builder.sysroot_libdir(*compiler, target).to_path_buf()
-    } else {
-        builder.sysroot_libdir(*compiler, target).join("self-contained")
-    };
+    let libdir_self_contained = builder.sysroot_libdir(*compiler, target).join("self-contained");
     t!(fs::create_dir_all(&libdir_self_contained));
     let mut target_deps = vec![];
 
diff --git a/src/ci/docker/host-x86_64/i686-gnu-nopt/Dockerfile b/src/ci/docker/host-x86_64/i686-gnu-nopt/Dockerfile
index c15b437e6d3..436215839f7 100644
--- a/src/ci/docker/host-x86_64/i686-gnu-nopt/Dockerfile
+++ b/src/ci/docker/host-x86_64/i686-gnu-nopt/Dockerfile
@@ -11,6 +11,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   cmake \
   sudo \
   gdb \
+  zlib1g-dev \
+  lib32z1-dev \
   xz-utils
 
 
diff --git a/src/ci/docker/host-x86_64/i686-gnu/Dockerfile b/src/ci/docker/host-x86_64/i686-gnu/Dockerfile
index 377f07cef4e..34a76f39668 100644
--- a/src/ci/docker/host-x86_64/i686-gnu/Dockerfile
+++ b/src/ci/docker/host-x86_64/i686-gnu/Dockerfile
@@ -11,6 +11,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   cmake \
   sudo \
   gdb \
+  zlib1g-dev \
+  lib32z1-dev \
   xz-utils
 
 
diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs
index 2ec777ac85c..87aee950082 100644
--- a/src/liballoc/lib.rs
+++ b/src/liballoc/lib.rs
@@ -87,7 +87,6 @@
 #![feature(const_generic_impls_guard)]
 #![feature(const_generics)]
 #![feature(const_in_array_repeat_expressions)]
-#![cfg_attr(bootstrap, feature(const_if_match))]
 #![feature(cow_is_borrowed)]
 #![feature(deque_range)]
 #![feature(dispatch_from_dyn)]
diff --git a/src/libcore/intrinsics.rs b/src/libcore/intrinsics.rs
index 45b636b0089..080760aa81f 100644
--- a/src/libcore/intrinsics.rs
+++ b/src/libcore/intrinsics.rs
@@ -1927,7 +1927,6 @@ extern "rust-intrinsic" {
     /// The to-be-stabilized version of this intrinsic is
     /// [`std::mem::variant_count`](../../std/mem/fn.variant_count.html)
     #[rustc_const_unstable(feature = "variant_count", issue = "73662")]
-    #[cfg(not(bootstrap))]
     pub fn variant_count<T>() -> usize;
 
     /// Rust's "try catch" construct which invokes the function pointer `try_fn`
@@ -1958,7 +1957,6 @@ extern "rust-intrinsic" {
     /// Internal placeholder for injecting code coverage counters when the "instrument-coverage"
     /// option is enabled. The placeholder is replaced with `llvm.instrprof.increment` during code
     /// generation.
-    #[cfg(not(bootstrap))]
     #[lang = "count_code_region"]
     pub fn count_code_region(index: u32, start_byte_pos: u32, end_byte_pos: u32);
 
@@ -1968,7 +1966,6 @@ extern "rust-intrinsic" {
     /// "coverage map", which is injected into the generated code, as additional data.
     /// This marker identifies a code region and two other counters or counter expressions
     /// whose sum is the number of times the code region was executed.
-    #[cfg(not(bootstrap))]
     pub fn coverage_counter_add(
         index: u32,
         left_index: u32,
@@ -1980,7 +1977,6 @@ extern "rust-intrinsic" {
     /// This marker identifies a code region and two other counters or counter expressions
     /// whose difference is the number of times the code region was executed.
     /// (See `coverage_counter_add` for more information.)
-    #[cfg(not(bootstrap))]
     pub fn coverage_counter_subtract(
         index: u32,
         left_index: u32,
@@ -1992,17 +1988,14 @@ extern "rust-intrinsic" {
     /// This marker identifies a code region to be added to the "coverage map" to indicate source
     /// code that can never be reached.
     /// (See `coverage_counter_add` for more information.)
-    #[cfg(not(bootstrap))]
     pub fn coverage_unreachable(start_byte_pos: u32, end_byte_pos: u32);
 
     /// See documentation of `<*const T>::guaranteed_eq` for details.
     #[rustc_const_unstable(feature = "const_raw_ptr_comparison", issue = "53020")]
-    #[cfg(not(bootstrap))]
     pub fn ptr_guaranteed_eq<T>(ptr: *const T, other: *const T) -> bool;
 
     /// See documentation of `<*const T>::guaranteed_ne` for details.
     #[rustc_const_unstable(feature = "const_raw_ptr_comparison", issue = "53020")]
-    #[cfg(not(bootstrap))]
     pub fn ptr_guaranteed_ne<T>(ptr: *const T, other: *const T) -> bool;
 }
 
diff --git a/src/libcore/lib.rs b/src/libcore/lib.rs
index c2dc3e5985f..96436bb253d 100644
--- a/src/libcore/lib.rs
+++ b/src/libcore/lib.rs
@@ -73,8 +73,6 @@
 #![feature(const_ascii_ctype_on_intrinsics)]
 #![feature(const_alloc_layout)]
 #![feature(const_discriminant)]
-#![cfg_attr(bootstrap, feature(const_if_match))]
-#![cfg_attr(bootstrap, feature(const_loop))]
 #![feature(const_checked_int_methods)]
 #![feature(const_euclidean_int_methods)]
 #![feature(const_overflowing_int_methods)]
@@ -87,7 +85,7 @@
 #![feature(const_generics)]
 #![feature(const_ptr_offset)]
 #![feature(const_ptr_offset_from)]
-#![cfg_attr(not(bootstrap), feature(const_raw_ptr_comparison))]
+#![feature(const_raw_ptr_comparison)]
 #![feature(const_result)]
 #![feature(const_slice_from_raw_parts)]
 #![feature(const_slice_ptr_len)]
@@ -121,13 +119,12 @@
 #![feature(staged_api)]
 #![feature(std_internals)]
 #![feature(stmt_expr_attributes)]
-#![cfg_attr(bootstrap, feature(track_caller))]
 #![feature(transparent_unions)]
 #![feature(unboxed_closures)]
 #![feature(unsized_locals)]
 #![feature(untagged_unions)]
 #![feature(unwind_attributes)]
-#![cfg_attr(not(bootstrap), feature(variant_count))]
+#![feature(variant_count)]
 #![feature(doc_alias)]
 #![feature(mmx_target_feature)]
 #![feature(tbm_target_feature)]
@@ -142,7 +139,7 @@
 #![feature(rtm_target_feature)]
 #![feature(f16c_target_feature)]
 #![feature(hexagon_target_feature)]
-#![cfg_attr(not(bootstrap), feature(const_fn_transmute))]
+#![feature(const_fn_transmute)]
 #![feature(abi_unadjusted)]
 #![feature(adx_target_feature)]
 #![feature(maybe_uninit_slice)]
@@ -293,7 +290,7 @@ pub mod primitive;
 )]
 // FIXME: This annotation should be moved into rust-lang/stdarch after clashing_extern_declarations is
 // merged. It currently cannot because bootstrap fails as the lint hasn't been defined yet.
-#[cfg_attr(not(bootstrap), allow(clashing_extern_declarations))]
+#[allow(clashing_extern_declarations)]
 #[unstable(feature = "stdsimd", issue = "48556")]
 mod core_arch;
 
diff --git a/src/libcore/mem/mod.rs b/src/libcore/mem/mod.rs
index 98d2027268b..d62de7617a0 100644
--- a/src/libcore/mem/mod.rs
+++ b/src/libcore/mem/mod.rs
@@ -1037,7 +1037,6 @@ pub const fn discriminant<T>(v: &T) -> Discriminant<T> {
 /// assert_eq!(mem::variant_count::<Result<!, !>>(), 2);
 /// ```
 #[inline(always)]
-#[cfg(not(bootstrap))]
 #[unstable(feature = "variant_count", issue = "73662")]
 #[rustc_const_unstable(feature = "variant_count", issue = "73662")]
 pub const fn variant_count<T>() -> usize {
diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index f4a1afd436a..7392a678b05 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -21,14 +21,6 @@ macro_rules! try_opt {
     };
 }
 
-#[cfg(bootstrap)]
-macro_rules! unlikely {
-    ($e: expr) => {
-        $e
-    };
-}
-
-#[cfg(not(bootstrap))]
 #[allow_internal_unstable(const_likely)]
 macro_rules! unlikely {
     ($e: expr) => {
@@ -1600,7 +1592,6 @@ $EndFeature, "
             #[stable(feature = "no_panic_abs", since = "1.13.0")]
             #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
             #[allow(unused_attributes)]
-            #[cfg_attr(bootstrap, allow_internal_unstable(const_if_match))]
             #[inline]
             pub const fn wrapping_abs(self) -> Self {
                  if self.is_negative() {
@@ -1889,7 +1880,6 @@ assert_eq!(", stringify!($SelfT), "::MIN.overflowing_neg(), (", stringify!($Self
             #[stable(feature = "wrapping", since = "1.7.0")]
             #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
             #[allow(unused_attributes)]
-            #[cfg_attr(bootstrap, allow_internal_unstable(const_if_match))]
             pub const fn overflowing_neg(self) -> (Self, bool) {
                 if unlikely!(self == Self::MIN) {
                     (Self::MIN, true)
@@ -2182,7 +2172,6 @@ $EndFeature, "
             #[stable(feature = "rust1", since = "1.0.0")]
             #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
             #[allow(unused_attributes)]
-            #[cfg_attr(bootstrap, allow_internal_unstable(const_if_match))]
             #[inline]
             #[rustc_inherit_overflow_checks]
             pub const fn abs(self) -> Self {
diff --git a/src/libcore/ops/function.rs b/src/libcore/ops/function.rs
index 2cdfee87a35..22a738d0bc1 100644
--- a/src/libcore/ops/function.rs
+++ b/src/libcore/ops/function.rs
@@ -224,7 +224,7 @@ pub trait FnMut<Args>: FnOnce<Args> {
 #[must_use = "closures are lazy and do nothing unless called"]
 pub trait FnOnce<Args> {
     /// The returned type after the call operator is used.
-    #[cfg_attr(not(bootstrap), lang = "fn_once_output")]
+    #[lang = "fn_once_output"]
     #[stable(feature = "fn_once_output", since = "1.12.0")]
     type Output;
 
diff --git a/src/libcore/ptr/const_ptr.rs b/src/libcore/ptr/const_ptr.rs
index 39d4aca636a..896ad740e1e 100644
--- a/src/libcore/ptr/const_ptr.rs
+++ b/src/libcore/ptr/const_ptr.rs
@@ -324,7 +324,6 @@ impl<T: ?Sized> *const T {
     #[unstable(feature = "const_raw_ptr_comparison", issue = "53020")]
     #[rustc_const_unstable(feature = "const_raw_ptr_comparison", issue = "53020")]
     #[inline]
-    #[cfg(not(bootstrap))]
     pub const fn guaranteed_eq(self, other: *const T) -> bool
     where
         T: Sized,
@@ -356,7 +355,6 @@ impl<T: ?Sized> *const T {
     #[unstable(feature = "const_raw_ptr_comparison", issue = "53020")]
     #[rustc_const_unstable(feature = "const_raw_ptr_comparison", issue = "53020")]
     #[inline]
-    #[cfg(not(bootstrap))]
     pub const fn guaranteed_ne(self, other: *const T) -> bool
     where
         T: Sized,
diff --git a/src/libcore/ptr/mut_ptr.rs b/src/libcore/ptr/mut_ptr.rs
index 644465d7d17..96856e7512c 100644
--- a/src/libcore/ptr/mut_ptr.rs
+++ b/src/libcore/ptr/mut_ptr.rs
@@ -305,7 +305,6 @@ impl<T: ?Sized> *mut T {
     #[unstable(feature = "const_raw_ptr_comparison", issue = "53020")]
     #[rustc_const_unstable(feature = "const_raw_ptr_comparison", issue = "53020")]
     #[inline]
-    #[cfg(not(bootstrap))]
     pub const fn guaranteed_eq(self, other: *mut T) -> bool
     where
         T: Sized,
@@ -337,7 +336,6 @@ impl<T: ?Sized> *mut T {
     #[unstable(feature = "const_raw_ptr_comparison", issue = "53020")]
     #[rustc_const_unstable(feature = "const_raw_ptr_comparison", issue = "53020")]
     #[inline]
-    #[cfg(not(bootstrap))]
     pub const unsafe fn guaranteed_ne(self, other: *mut T) -> bool
     where
         T: Sized,
diff --git a/src/libcore/slice/mod.rs b/src/libcore/slice/mod.rs
index 0e202bb7801..309a4ddb006 100644
--- a/src/libcore/slice/mod.rs
+++ b/src/libcore/slice/mod.rs
@@ -6233,14 +6233,8 @@ where
             return false;
         }
 
-        #[cfg(bootstrap)]
-        if self.as_ptr() == other.as_ptr() {
-            return true;
-        }
-
         // While performance would suffer if `guaranteed_eq` just returned `false`
         // for all arguments, correctness and return value of this function are not affected.
-        #[cfg(not(bootstrap))]
         if self.as_ptr().guaranteed_eq(other.as_ptr()) {
             return true;
         }
@@ -6259,14 +6253,8 @@ where
             return false;
         }
 
-        #[cfg(bootstrap)]
-        if self.as_ptr() == other.as_ptr() {
-            return true;
-        }
-
         // While performance would suffer if `guaranteed_eq` just returned `false`
         // for all arguments, correctness and return value of this function are not affected.
-        #[cfg(not(bootstrap))]
         if self.as_ptr().guaranteed_eq(other.as_ptr()) {
             return true;
         }
diff --git a/src/libpanic_abort/lib.rs b/src/libpanic_abort/lib.rs
index 95f3966228a..cf52091f609 100644
--- a/src/libpanic_abort/lib.rs
+++ b/src/libpanic_abort/lib.rs
@@ -21,7 +21,7 @@
 use core::any::Any;
 
 #[rustc_std_internal_symbol]
-#[cfg_attr(not(bootstrap), allow(improper_ctypes_definitions))]
+#[allow(improper_ctypes_definitions)]
 pub unsafe extern "C" fn __rust_panic_cleanup(_: *mut u8) -> *mut (dyn Any + Send + 'static) {
     unreachable!()
 }
diff --git a/src/libpanic_unwind/lib.rs b/src/libpanic_unwind/lib.rs
index 430062d4ac4..72eab0763d8 100644
--- a/src/libpanic_unwind/lib.rs
+++ b/src/libpanic_unwind/lib.rs
@@ -93,7 +93,7 @@ extern "C" {
 mod dwarf;
 
 #[rustc_std_internal_symbol]
-#[cfg_attr(not(bootstrap), allow(improper_ctypes_definitions))]
+#[allow(improper_ctypes_definitions)]
 pub unsafe extern "C" fn __rust_panic_cleanup(payload: *mut u8) -> *mut (dyn Any + Send + 'static) {
     Box::into_raw(imp::cleanup(payload))
 }
diff --git a/src/librustc_ast/lib.rs b/src/librustc_ast/lib.rs
index c32ed1ea48c..ca68db0b9f6 100644
--- a/src/librustc_ast/lib.rs
+++ b/src/librustc_ast/lib.rs
@@ -7,10 +7,9 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/", test(attr(deny(warnings))))]
 #![feature(bool_to_option)]
 #![feature(box_syntax)]
-#![cfg_attr(bootstrap, feature(const_if_match))]
 #![feature(const_fn)] // For the `transmute` in `P::new`
 #![feature(const_panic)]
-#![cfg_attr(not(bootstrap), feature(const_fn_transmute))]
+#![feature(const_fn_transmute)]
 #![feature(crate_visibility_modifier)]
 #![feature(label_break_value)]
 #![feature(nll)]
diff --git a/src/librustc_driver/lib.rs b/src/librustc_driver/lib.rs
index 982a615dd91..ab4eac9440b 100644
--- a/src/librustc_driver/lib.rs
+++ b/src/librustc_driver/lib.rs
@@ -6,7 +6,6 @@
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
 #![feature(nll)]
-#![cfg_attr(bootstrap, feature(track_caller))]
 #![recursion_limit = "256"]
 
 #[macro_use]
diff --git a/src/librustc_errors/lib.rs b/src/librustc_errors/lib.rs
index 362913ceadf..73d71063b23 100644
--- a/src/librustc_errors/lib.rs
+++ b/src/librustc_errors/lib.rs
@@ -5,7 +5,6 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
 #![feature(crate_visibility_modifier)]
 #![feature(nll)]
-#![cfg_attr(bootstrap, feature(track_caller))]
 
 pub use emitter::ColorConfig;
 
diff --git a/src/librustc_hir/lib.rs b/src/librustc_hir/lib.rs
index 20ac2a04b47..37041923890 100644
--- a/src/librustc_hir/lib.rs
+++ b/src/librustc_hir/lib.rs
@@ -3,7 +3,6 @@
 //! [rustc dev guide]: https://rustc-dev-guide.rust-lang.org/hir.html
 
 #![feature(crate_visibility_modifier)]
-#![cfg_attr(bootstrap, feature(const_if_match))]
 #![feature(const_fn)] // For the unsizing cast on `&[]`
 #![feature(const_panic)]
 #![feature(in_band_lifetimes)]
diff --git a/src/librustc_index/lib.rs b/src/librustc_index/lib.rs
index 6fef49668da..eaef4c7b54a 100644
--- a/src/librustc_index/lib.rs
+++ b/src/librustc_index/lib.rs
@@ -1,5 +1,4 @@
 #![feature(allow_internal_unstable)]
-#![cfg_attr(bootstrap, feature(const_if_match))]
 #![feature(const_fn)]
 #![feature(const_panic)]
 #![feature(extend_one)]
diff --git a/src/librustc_infer/lib.rs b/src/librustc_infer/lib.rs
index 27e086f1d50..0cd6585163c 100644
--- a/src/librustc_infer/lib.rs
+++ b/src/librustc_infer/lib.rs
@@ -17,7 +17,6 @@
 #![feature(box_patterns)]
 #![feature(box_syntax)]
 #![feature(const_fn)]
-#![cfg_attr(bootstrap, feature(const_if_match))]
 #![feature(const_panic)]
 #![feature(extend_one)]
 #![feature(never_type)]
diff --git a/src/librustc_lint/lib.rs b/src/librustc_lint/lib.rs
index 6b5353e033f..ab30d545edf 100644
--- a/src/librustc_lint/lib.rs
+++ b/src/librustc_lint/lib.rs
@@ -34,7 +34,6 @@
 #![feature(never_type)]
 #![feature(nll)]
 #![feature(or_patterns)]
-#![cfg_attr(bootstrap, feature(track_caller))]
 #![recursion_limit = "256"]
 
 #[macro_use]
diff --git a/src/librustc_llvm/lib.rs b/src/librustc_llvm/lib.rs
index f54ed9b9202..36300d9efee 100644
--- a/src/librustc_llvm/lib.rs
+++ b/src/librustc_llvm/lib.rs
@@ -15,7 +15,7 @@ pub struct RustString {
 
 /// Appending to a Rust string -- used by RawRustStringOstream.
 #[no_mangle]
-#[cfg_attr(not(bootstrap), allow(improper_ctypes_definitions))]
+#[allow(improper_ctypes_definitions)]
 pub unsafe extern "C" fn LLVMRustStringWriteImpl(
     sr: &RustString,
     ptr: *const c_char,
diff --git a/src/librustc_middle/lib.rs b/src/librustc_middle/lib.rs
index c2b14cb2e84..b7dccb8d8ce 100644
--- a/src/librustc_middle/lib.rs
+++ b/src/librustc_middle/lib.rs
@@ -27,10 +27,9 @@
 #![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(box_syntax)]
-#![cfg_attr(bootstrap, feature(const_if_match))]
 #![feature(const_fn)]
 #![feature(const_panic)]
-#![cfg_attr(not(bootstrap), feature(const_fn_transmute))]
+#![feature(const_fn_transmute)]
 #![feature(core_intrinsics)]
 #![feature(discriminant_kind)]
 #![feature(drain_filter)]
@@ -42,7 +41,6 @@
 #![feature(or_patterns)]
 #![feature(range_is_empty)]
 #![feature(min_specialization)]
-#![cfg_attr(bootstrap, feature(track_caller))]
 #![feature(trusted_len)]
 #![feature(stmt_expr_attributes)]
 #![feature(test)]
diff --git a/src/librustc_mir/lib.rs b/src/librustc_mir/lib.rs
index eff1dc13555..cd6c38997f1 100644
--- a/src/librustc_mir/lib.rs
+++ b/src/librustc_mir/lib.rs
@@ -10,8 +10,6 @@ Rust MIR: a lowered representation of Rust.
 #![feature(box_patterns)]
 #![feature(box_syntax)]
 #![feature(const_fn)]
-#![cfg_attr(bootstrap, feature(const_if_match))]
-#![cfg_attr(bootstrap, feature(const_loop))]
 #![feature(const_panic)]
 #![feature(crate_visibility_modifier)]
 #![feature(decl_macro)]
diff --git a/src/librustc_mir_build/lib.rs b/src/librustc_mir_build/lib.rs
index be495e431eb..ed154b9dc6f 100644
--- a/src/librustc_mir_build/lib.rs
+++ b/src/librustc_mir_build/lib.rs
@@ -4,7 +4,6 @@
 
 #![feature(box_patterns)]
 #![feature(box_syntax)]
-#![cfg_attr(bootstrap, feature(const_if_match))]
 #![feature(const_fn)]
 #![feature(const_panic)]
 #![feature(crate_visibility_modifier)]
diff --git a/src/librustc_passes/lib.rs b/src/librustc_passes/lib.rs
index 3f10c418811..95b236ba1c9 100644
--- a/src/librustc_passes/lib.rs
+++ b/src/librustc_passes/lib.rs
@@ -8,7 +8,6 @@
 #![feature(in_band_lifetimes)]
 #![feature(nll)]
 #![feature(or_patterns)]
-#![cfg_attr(bootstrap, feature(track_caller))]
 #![recursion_limit = "256"]
 
 #[macro_use]
diff --git a/src/librustc_privacy/lib.rs b/src/librustc_privacy/lib.rs
index 2c5cbed2192..e6e0bd5fe74 100644
--- a/src/librustc_privacy/lib.rs
+++ b/src/librustc_privacy/lib.rs
@@ -2,7 +2,6 @@
 #![feature(in_band_lifetimes)]
 #![feature(nll)]
 #![feature(or_patterns)]
-#![cfg_attr(bootstrap, feature(track_caller))]
 #![recursion_limit = "256"]
 
 use rustc_attr as attr;
diff --git a/src/librustc_query_system/lib.rs b/src/librustc_query_system/lib.rs
index 74a54176774..b7615b25c4a 100644
--- a/src/librustc_query_system/lib.rs
+++ b/src/librustc_query_system/lib.rs
@@ -1,6 +1,5 @@
 #![feature(bool_to_option)]
 #![feature(const_fn)]
-#![cfg_attr(bootstrap, feature(const_if_match))]
 #![feature(const_panic)]
 #![feature(core_intrinsics)]
 #![feature(hash_raw_entry)]
diff --git a/src/librustc_save_analysis/lib.rs b/src/librustc_save_analysis/lib.rs
index e29bc9f078d..9899569fa0b 100644
--- a/src/librustc_save_analysis/lib.rs
+++ b/src/librustc_save_analysis/lib.rs
@@ -1,7 +1,6 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
 #![feature(nll)]
 #![feature(or_patterns)]
-#![cfg_attr(bootstrap, feature(track_caller))]
 #![recursion_limit = "256"]
 
 mod dump_visitor;
diff --git a/src/librustc_span/lib.rs b/src/librustc_span/lib.rs
index 699871f1c61..666080028c1 100644
--- a/src/librustc_span/lib.rs
+++ b/src/librustc_span/lib.rs
@@ -6,7 +6,6 @@
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
 #![feature(crate_visibility_modifier)]
-#![cfg_attr(bootstrap, feature(const_if_match))]
 #![feature(const_fn)]
 #![feature(const_panic)]
 #![feature(negative_impls)]
diff --git a/src/librustc_target/lib.rs b/src/librustc_target/lib.rs
index ec6deb5b059..1d0dc660ee6 100644
--- a/src/librustc_target/lib.rs
+++ b/src/librustc_target/lib.rs
@@ -9,7 +9,6 @@
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
 #![feature(bool_to_option)]
-#![cfg_attr(bootstrap, feature(const_if_match))]
 #![feature(const_fn)]
 #![feature(const_panic)]
 #![feature(nll)]
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index b5ba0da7ae5..54fc35b20f7 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -320,7 +320,6 @@
 #![feature(toowned_clone_into)]
 #![feature(total_cmp)]
 #![feature(trace_macros)]
-#![cfg_attr(bootstrap, feature(track_caller))]
 #![feature(try_reserve)]
 #![feature(unboxed_closures)]
 #![feature(unsafe_block_in_unsafe_fn)]
diff --git a/src/libstd/sys/unix/args.rs b/src/libstd/sys/unix/args.rs
index 5b712e20242..9bc44a59482 100644
--- a/src/libstd/sys/unix/args.rs
+++ b/src/libstd/sys/unix/args.rs
@@ -208,7 +208,7 @@ mod imp {
         #[cfg(target_arch = "aarch64")]
         extern "C" {
             fn objc_msgSend(obj: NsId, sel: Sel) -> NsId;
-            #[cfg_attr(not(bootstrap), allow(clashing_extern_declarations))]
+            #[allow(clashing_extern_declarations)]
             #[link_name = "objc_msgSend"]
             fn objc_msgSend_ul(obj: NsId, sel: Sel, i: libc::c_ulong) -> NsId;
         }
@@ -216,7 +216,7 @@ mod imp {
         #[cfg(not(target_arch = "aarch64"))]
         extern "C" {
             fn objc_msgSend(obj: NsId, sel: Sel, ...) -> NsId;
-            #[cfg_attr(not(bootstrap), allow(clashing_extern_declarations))]
+            #[allow(clashing_extern_declarations)]
             #[link_name = "objc_msgSend"]
             fn objc_msgSend_ul(obj: NsId, sel: Sel, ...) -> NsId;
         }
diff --git a/src/stage0.txt b/src/stage0.txt
index 769ec669bdc..4234ce4bac0 100644
--- a/src/stage0.txt
+++ b/src/stage0.txt
@@ -12,7 +12,7 @@
 # source tarball for a stable release you'll likely see `1.x.0` for rustc and
 # `0.(x+1).0` for Cargo where they were released on `date`.
 
-date: 2020-06-16
+date: 2020-07-16
 rustc: beta
 cargo: beta
 
@@ -20,7 +20,7 @@ cargo: beta
 # bootstrapping issues with use of new syntax in this repo. If you're looking at
 # the beta/stable branch, this key should be omitted, as we don't want to depend
 # on rustfmt from nightly there.
-rustfmt: nightly-2020-04-22
+rustfmt: nightly-2020-07-12
 
 # When making a stable release the process currently looks like:
 #