step cfgs

Author: Mark-Simulacrum

compiler/rustc_ast/src/lib.rs

@@ -16,7 +16,6 @@
 #![feature(box_patterns)]
 #![feature(if_let_guard)]
 #![feature(let_chains)]
-#![cfg_attr(bootstrap, feature(min_specialization))]
 #![feature(never_type)]
 #![feature(negative_impls)]
 #![feature(stmt_expr_attributes)]

compiler/rustc_errors/src/lib.rs

@@ -7,7 +7,6 @@
 #![allow(internal_features)]
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::untranslatable_diagnostic)]
-#![cfg_attr(bootstrap, feature(min_specialization))]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
 #![feature(array_windows)]

compiler/rustc_hir/src/lib.rs

@@ -5,7 +5,6 @@
 #![feature(associated_type_defaults)]
 #![feature(closure_track_caller)]
 #![feature(let_chains)]
-#![cfg_attr(bootstrap, feature(min_specialization))]
 #![feature(never_type)]
 #![feature(rustc_attrs)]
 #![feature(variant_count)]

compiler/rustc_hir_analysis/src/lib.rs

@@ -68,7 +68,6 @@ This API is completely unstable and subject to change.
 #![feature(is_sorted)]
 #![feature(iter_intersperse)]
 #![feature(let_chains)]
-#![cfg_attr(bootstrap, feature(min_specialization))]
 #![feature(never_type)]
 #![feature(lazy_cell)]
 #![feature(slice_partition_dedup)]

compiler/rustc_hir_typeck/src/lib.rs

@@ -5,7 +5,6 @@
 #![feature(try_blocks)]
 #![feature(never_type)]
 #![feature(box_patterns)]
-#![cfg_attr(bootstrap, feature(min_specialization))]
 #![feature(control_flow_enum)]
 
 #[macro_use]

compiler/rustc_infer/src/lib.rs

@@ -25,7 +25,6 @@
 #![feature(let_chains)]
 #![feature(if_let_guard)]
 #![feature(iterator_try_collect)]
-#![cfg_attr(bootstrap, feature(min_specialization))]
 #![feature(try_blocks)]
 #![recursion_limit = "512"] // For rustdoc
 

compiler/rustc_middle/src/lib.rs

@@ -24,8 +24,7 @@
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
-#![cfg_attr(bootstrap, feature(exhaustive_patterns))]
-#![cfg_attr(not(bootstrap), feature(min_exhaustive_patterns))]
+#![feature(min_exhaustive_patterns)]
 #![feature(rustdoc_internals)]
 #![feature(allocator_api)]
 #![feature(array_windows)]

compiler/rustc_mir_build/src/lib.rs

@@ -9,7 +9,6 @@
 #![feature(box_patterns)]
 #![feature(if_let_guard)]
 #![feature(let_chains)]
-#![cfg_attr(bootstrap, feature(min_specialization))]
 #![feature(try_blocks)]
 
 #[macro_use]

compiler/rustc_mir_dataflow/src/lib.rs

@@ -2,7 +2,6 @@
 #![feature(box_patterns)]
 #![feature(exact_size_is_empty)]
 #![feature(let_chains)]
-#![cfg_attr(bootstrap, feature(min_specialization))]
 #![feature(try_blocks)]
 
 #[macro_use]

compiler/rustc_mir_transform/src/lib.rs

@@ -8,7 +8,6 @@
 #![feature(is_sorted)]
 #![feature(let_chains)]
 #![feature(map_try_insert)]
-#![cfg_attr(bootstrap, feature(min_specialization))]
 #![feature(never_type)]
 #![feature(option_get_or_insert_default)]
 #![feature(round_char_boundary)]

compiler/rustc_target/src/lib.rs

@@ -9,13 +9,11 @@
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
-#![cfg_attr(bootstrap, feature(exhaustive_patterns))]
-#![cfg_attr(not(bootstrap), feature(min_exhaustive_patterns))]
+#![feature(min_exhaustive_patterns)]
 #![feature(rustdoc_internals)]
 #![feature(assert_matches)]
 #![feature(iter_intersperse)]
 #![feature(let_chains)]
-#![cfg_attr(bootstrap, feature(min_specialization))]
 #![feature(rustc_attrs)]
 #![feature(step_trait)]
 #![allow(internal_features)]

compiler/rustc_trait_selection/src/lib.rs

@@ -26,7 +26,6 @@
 #![feature(option_take_if)]
 #![feature(never_type)]
 #![feature(type_alias_impl_trait)]
-#![cfg_attr(bootstrap, feature(min_specialization))]
 #![recursion_limit = "512"] // For rustdoc
 
 #[macro_use]

library/alloc/src/alloc.rs

@@ -51,7 +51,7 @@ extern "Rust" {
 #[derive(Copy, Clone, Default, Debug)]
 #[cfg(not(test))]
 // the compiler needs to know when a Box uses the global allocator vs a custom one
-#[cfg_attr(not(bootstrap), lang = "global_alloc_ty")]
+#[lang = "global_alloc_ty"]
 pub struct Global;
 
 #[cfg(test)]
@@ -387,8 +387,7 @@ pub const fn handle_alloc_error(layout: Layout) -> ! {
     }
 
     #[cfg(not(feature = "panic_immediate_abort"))]
-    #[cfg_attr(not(bootstrap), allow(unused_unsafe))] // on bootstrap bump, remove unsafe block
-    unsafe {
+    {
         core::intrinsics::const_eval_select((layout,), ct_error, rt_error)
     }
 

library/core/src/convert/mod.rs

@@ -396,7 +396,7 @@ pub trait AsMut<T: ?Sized> {
 /// For example, take this code:
 ///
 /// ```
-/// # #![cfg_attr(not(bootstrap), allow(non_local_definitions))]
+/// # #![allow(non_local_definitions)]
 /// struct Wrapper<T>(Vec<T>);
 /// impl<T> From<Wrapper<T>> for Vec<T> {
 ///     fn from(w: Wrapper<T>) -> Vec<T> {

library/core/src/ffi/c_str.rs

@@ -438,13 +438,7 @@ impl CStr {
             unsafe { &*(bytes as *const [u8] as *const CStr) }
         }
 
-        #[cfg_attr(not(bootstrap), allow(unused_unsafe))] // on bootstrap bump, remove unsafe block
-        // SAFETY: The const and runtime versions have identical behavior
-        // unless the safety contract of `from_bytes_with_nul_unchecked` is
-        // violated, which is UB.
-        unsafe {
-            intrinsics::const_eval_select((bytes,), const_impl, rt_impl)
-        }
+        intrinsics::const_eval_select((bytes,), const_impl, rt_impl)
     }
 
     /// Returns the inner pointer to this C string.
@@ -759,7 +753,7 @@ const unsafe fn const_strlen(ptr: *const c_char) -> usize {
         unsafe { strlen(s) }
     }
 
-    #[cfg_attr(not(bootstrap), allow(unused_unsafe))] // on bootstrap bump, remove unsafe block
+    #[allow(unused_unsafe)] // on bootstrap bump, remove unsafe block
     // SAFETY: the two functions always provide equivalent functionality
     unsafe {
         intrinsics::const_eval_select((ptr,), strlen_ct, strlen_rt)

library/core/src/hash/mod.rs

@@ -454,7 +454,7 @@ pub trait Hasher {
     /// ```
     /// #![feature(hasher_prefixfree_extras)]
     /// # // Stubs to make the `impl` below pass the compiler
-    /// # #![cfg_attr(not(bootstrap), allow(non_local_definitions))]
+    /// # #![allow(non_local_definitions)]
     /// # struct MyCollection<T>(Option<T>);
     /// # impl<T> MyCollection<T> {
     /// #     fn len(&self) -> usize { todo!() }