Stabilize generic `NonZero`.

compiler/rustc_attr/src/lib.rs

@@ -7,7 +7,6 @@
 #![allow(internal_features)]
 #![feature(rustdoc_internals)]
 #![doc(rust_logo)]
-#![feature(generic_nonzero)]
 #![feature(let_chains)]
 
 #[macro_use]

compiler/rustc_const_eval/src/lib.rs

@@ -11,7 +11,6 @@ Rust MIR: a lowered representation of Rust.
 #![feature(assert_matches)]
 #![feature(box_patterns)]
 #![feature(decl_macro)]
-#![feature(generic_nonzero)]
 #![feature(let_chains)]
 #![feature(slice_ptr_get)]
 #![feature(strict_provenance)]

compiler/rustc_data_structures/src/lib.rs

@@ -20,7 +20,6 @@
 #![feature(cfg_match)]
 #![feature(core_intrinsics)]
 #![feature(extend_one)]
-#![feature(generic_nonzero)]
 #![feature(hash_raw_entry)]
 #![feature(hasher_prefixfree_extras)]
 #![feature(lazy_cell)]

compiler/rustc_errors/src/lib.rs

@@ -15,7 +15,6 @@
 #![feature(box_patterns)]
 #![feature(error_reporter)]
 #![feature(extract_if)]
-#![feature(generic_nonzero)]
 #![feature(let_chains)]
 #![feature(negative_impls)]
 #![feature(never_type)]

compiler/rustc_feature/src/lib.rs

@@ -12,7 +12,6 @@
 //! symbol to the `accepted` or `removed` modules respectively.
 
 #![allow(internal_features)]
-#![feature(generic_nonzero)]
 #![feature(rustdoc_internals)]
 #![doc(rust_logo)]
 #![feature(lazy_cell)]

compiler/rustc_hir_analysis/src/lib.rs

@@ -63,7 +63,6 @@ This API is completely unstable and subject to change.
 #![feature(rustdoc_internals)]
 #![allow(internal_features)]
 #![feature(control_flow_enum)]
-#![feature(generic_nonzero)]
 #![feature(if_let_guard)]
 #![feature(is_sorted)]
 #![feature(iter_intersperse)]

compiler/rustc_interface/src/lib.rs

@@ -1,5 +1,4 @@
 #![feature(decl_macro)]
-#![feature(generic_nonzero)]
 #![feature(lazy_cell)]
 #![feature(let_chains)]
 #![feature(thread_spawn_unchecked)]

compiler/rustc_lint/src/lib.rs

@@ -32,7 +32,6 @@
 #![feature(box_patterns)]
 #![feature(control_flow_enum)]
 #![feature(extract_if)]
-#![feature(generic_nonzero)]
 #![feature(if_let_guard)]
 #![feature(iter_order_by)]
 #![feature(let_chains)]

compiler/rustc_metadata/src/lib.rs

@@ -6,7 +6,6 @@
 #![feature(error_iter)]
 #![feature(extract_if)]
 #![feature(coroutines)]
-#![feature(generic_nonzero)]
 #![feature(iter_from_coroutine)]
 #![feature(let_chains)]
 #![feature(if_let_guard)]

compiler/rustc_middle/src/lib.rs

@@ -35,7 +35,6 @@
 #![feature(const_type_name)]
 #![feature(discriminant_kind)]
 #![feature(coroutines)]
-#![feature(generic_nonzero)]
 #![feature(if_let_guard)]
 #![feature(inline_const)]
 #![feature(iter_from_coroutine)]

compiler/rustc_passes/src/lib.rs

@@ -8,7 +8,6 @@
 #![doc(rust_logo)]
 #![feature(rustdoc_internals)]
 #![allow(internal_features)]
-#![feature(generic_nonzero)]
 #![feature(let_chains)]
 #![feature(map_try_insert)]
 #![feature(try_blocks)]

compiler/rustc_query_impl/src/lib.rs

@@ -3,7 +3,6 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
 #![feature(rustdoc_internals)]
-#![feature(generic_nonzero)]
 #![feature(min_specialization)]
 #![feature(rustc_attrs)]
 #![allow(rustc::potential_query_instability, unused_parens)]

compiler/rustc_query_system/src/lib.rs

@@ -1,6 +1,5 @@
 #![feature(assert_matches)]
 #![feature(core_intrinsics)]
-#![feature(generic_nonzero)]
 #![feature(hash_raw_entry)]
 #![feature(min_specialization)]
 #![feature(let_chains)]

compiler/rustc_serialize/src/lib.rs

@@ -11,7 +11,6 @@
 #![cfg_attr(bootstrap, feature(associated_type_bounds))]
 #![feature(const_option)]
 #![feature(core_intrinsics)]
-#![feature(generic_nonzero)]
 #![feature(inline_const)]
 #![feature(min_specialization)]
 #![feature(never_type)]

compiler/rustc_session/src/lib.rs

@@ -1,4 +1,3 @@
-#![feature(generic_nonzero)]
 #![feature(let_chains)]
 #![feature(lazy_cell)]
 #![feature(option_get_or_insert_default)]

library/alloc/src/lib.rs

@@ -126,7 +126,6 @@
 #![feature(extend_one)]
 #![feature(fmt_internals)]
 #![feature(fn_traits)]
-#![feature(generic_nonzero)]
 #![feature(hasher_prefixfree_extras)]
 #![feature(hint_assert_unchecked)]
 #![feature(inline_const)]

library/alloc/tests/lib.rs

@@ -14,7 +14,6 @@
 #![feature(core_intrinsics)]
 #![feature(extract_if)]
 #![feature(exact_size_is_empty)]
-#![feature(generic_nonzero)]
 #![feature(linked_list_cursors)]
 #![feature(map_try_insert)]
 #![feature(new_uninit)]

library/core/src/array/mod.rs

@@ -512,7 +512,8 @@ impl<T, const N: usize> [T; N] {
     /// # Examples
     ///
     /// ```
-    /// #![feature(array_try_map, generic_nonzero)]
+    /// #![feature(array_try_map)]
+    ///
     /// let a = ["1", "2", "3"];
     /// let b = a.try_map(|v| v.parse::<u32>()).unwrap().map(|v| v + 1);
     /// assert_eq!(b, [2, 3, 4]);
@@ -522,8 +523,10 @@ impl<T, const N: usize> [T; N] {
     /// assert!(b.is_err());
     ///
     /// use std::num::NonZero;
+    ///
     /// let z = [1, 2, 0, 3, 4];
     /// assert_eq!(z.try_map(NonZero::new), None);
+    ///
     /// let a = [1, 2, 3];
     /// let b = a.try_map(NonZero::new);
     /// let c = b.map(|x| x.map(NonZero::get));

library/core/src/iter/traits/double_ended.rs

@@ -118,7 +118,8 @@ pub trait DoubleEndedIterator: Iterator {
     /// Basic usage:
     ///
     /// ```
-    /// #![feature(generic_nonzero, iter_advance_by)]
+    /// #![feature(iter_advance_by)]
+    ///
     /// use std::num::NonZero;
     ///
     /// let a = [3, 4, 5, 6];

library/core/src/iter/traits/iterator.rs

@@ -288,7 +288,8 @@ pub trait Iterator {
     /// # Examples
     ///
     /// ```
-    /// #![feature(generic_nonzero, iter_advance_by)]
+    /// #![feature(iter_advance_by)]
+    ///
     /// use std::num::NonZero;
     ///
     /// let a = [1, 2, 3, 4];
@@ -2939,7 +2940,8 @@ pub trait Iterator {
     /// This also supports other types which implement [`Try`], not just [`Result`].
     ///
     /// ```
-    /// #![feature(generic_nonzero, try_find)]
+    /// #![feature(try_find)]
+    ///
     /// use std::num::NonZero;
     ///
     /// let a = [3, 5, 7, 4, 9, 0, 11u32];

library/core/src/num/mod.rs

@@ -67,15 +67,15 @@ pub use error::ParseIntError;
 )]
 pub use nonzero::ZeroablePrimitive;
 
-#[unstable(feature = "generic_nonzero", issue = "120257")]
+#[stable(feature = "generic_nonzero", since = "CURRENT_RUSTC_VERSION")]
 pub use nonzero::NonZero;
 
-#[stable(feature = "nonzero", since = "1.28.0")]
-pub use nonzero::{NonZeroU128, NonZeroU16, NonZeroU32, NonZeroU64, NonZeroU8, NonZeroUsize};
-
 #[stable(feature = "signed_nonzero", since = "1.34.0")]
 pub use nonzero::{NonZeroI128, NonZeroI16, NonZeroI32, NonZeroI64, NonZeroI8, NonZeroIsize};
 
+#[stable(feature = "nonzero", since = "1.28.0")]
+pub use nonzero::{NonZeroU128, NonZeroU16, NonZeroU32, NonZeroU64, NonZeroU8, NonZeroUsize};
+
 #[stable(feature = "try_from", since = "1.34.0")]
 pub use error::TryFromIntError;
 

library/core/src/num/nonzero.rs

@@ -105,12 +105,11 @@ impl_zeroable_primitive!(
 /// For example, `Option<NonZero<u32>>` is the same size as `u32`:
 ///
 /// ```
-/// #![feature(generic_nonzero)]
-/// use core::mem::size_of;
+/// use core::{mem::size_of, num::NonZero};
 ///
-/// assert_eq!(size_of::<Option<core::num::NonZero<u32>>>(), size_of::<u32>());
+/// assert_eq!(size_of::<Option<NonZero<u32>>>(), size_of::<u32>());
 /// ```
-#[unstable(feature = "generic_nonzero", issue = "120257")]
+#[stable(feature = "generic_nonzero", since = "CURRENT_RUSTC_VERSION")]
 #[repr(transparent)]
 #[rustc_nonnull_optimization_guaranteed]
 #[rustc_diagnostic_item = "NonZero"]
@@ -562,7 +561,8 @@ macro_rules! nonzero_integer {
             /// Basic usage:
             ///
             /// ```
-            /// #![feature(generic_nonzero, non_zero_count_ones)]
+            /// #![feature(non_zero_count_ones)]
+            ///
             /// # fn main() { test().unwrap(); }
             /// # fn test() -> Option<()> {
             /// # use std::num::*;

library/core/tests/lib.rs

@@ -42,7 +42,6 @@
 #![feature(float_minimum_maximum)]
 #![feature(future_join)]
 #![feature(generic_assert_internals)]
-#![feature(generic_nonzero)]
 #![feature(array_try_from_fn)]
 #![feature(hasher_prefixfree_extras)]
 #![feature(hashmap_internals)]

library/proc_macro/src/lib.rs

@@ -26,7 +26,6 @@
 #![feature(staged_api)]
 #![feature(allow_internal_unstable)]
 #![feature(decl_macro)]
-#![feature(generic_nonzero)]
 #![feature(maybe_uninit_write_slice)]
 #![feature(negative_impls)]
 #![feature(new_uninit)]

library/std/src/lib.rs

@@ -335,7 +335,6 @@
 #![feature(float_minimum_maximum)]
 #![feature(float_next_up_down)]
 #![feature(fmt_internals)]
-#![feature(generic_nonzero)]
 #![feature(hasher_prefixfree_extras)]
 #![feature(hashmap_internals)]
 #![feature(hint_assert_unchecked)]

library/std/src/num.rs

@@ -23,11 +23,12 @@ pub use core::num::{FpCategory, ParseFloatError, ParseIntError, TryFromIntError}
 )]
 pub use core::num::ZeroablePrimitive;
 
-#[unstable(feature = "generic_nonzero", issue = "120257")]
+#[stable(feature = "generic_nonzero", since = "CURRENT_RUSTC_VERSION")]
 pub use core::num::NonZero;
 
 #[stable(feature = "signed_nonzero", since = "1.34.0")]
 pub use core::num::{NonZeroI128, NonZeroI16, NonZeroI32, NonZeroI64, NonZeroI8, NonZeroIsize};
+
 #[stable(feature = "nonzero", since = "1.28.0")]
 pub use core::num::{NonZeroU128, NonZeroU16, NonZeroU32, NonZeroU64, NonZeroU8, NonZeroUsize};
 

library/std/src/process.rs

@@ -1865,7 +1865,8 @@ impl ExitStatusError {
     /// # Examples
     ///
     /// ```
-    /// #![feature(exit_status_error, generic_nonzero)]
+    /// #![feature(exit_status_error)]
+    ///
     /// # if cfg!(unix) {
     /// use std::num::NonZero;
     /// use std::process::Command;

library/test/src/lib.rs

@@ -17,7 +17,6 @@
 #![unstable(feature = "test", issue = "50297")]
 #![doc(test(attr(deny(warnings))))]
 #![doc(rust_logo)]
-#![feature(generic_nonzero)]
 #![feature(rustdoc_internals)]
 #![feature(internal_output_capture)]
 #![feature(staged_api)]

src/tools/miri/src/bin/miri.rs

@@ -1,4 +1,3 @@
-#![feature(generic_nonzero)]
 #![feature(rustc_private, stmt_expr_attributes)]
 #![allow(
     clippy::manual_range_contains,

src/tools/miri/src/lib.rs

@@ -2,7 +2,6 @@
 #![feature(cell_update)]
 #![feature(const_option)]
 #![feature(float_gamma)]
-#![feature(generic_nonzero)]
 #![feature(map_try_insert)]
 #![feature(never_type)]
 #![feature(try_blocks)]

tests/codegen/array-equality.rs

@@ -1,7 +1,6 @@
 //@ compile-flags: -O -Z merge-functions=disabled
 //@ only-x86_64
 #![crate_type = "lib"]
-#![feature(generic_nonzero)]
 
 // CHECK-LABEL: @array_eq_value
 #[no_mangle]

tests/codegen/enum/enum-debug-niche-2.rs

@@ -7,7 +7,7 @@
 // CHECK: {{.*}}DICompositeType{{.*}}tag: DW_TAG_variant_part,{{.*}}size: 32,{{.*}}
 // CHECK: {{.*}}DIDerivedType{{.*}}tag: DW_TAG_member,{{.*}}name: "Placeholder",{{.*}}extraData: i128 4294967295{{[,)].*}}
 // CHECK: {{.*}}DIDerivedType{{.*}}tag: DW_TAG_member,{{.*}}name: "Error",{{.*}}extraData: i128 0{{[,)].*}}
-#![feature(generic_nonzero, never_type)]
+#![feature(never_type)]
 
 #[derive(Copy, Clone)]
 pub struct Entity {

tests/codegen/function-arguments.rs

@@ -1,7 +1,6 @@
 //@ compile-flags: -O -C no-prepopulate-passes
 #![crate_type = "lib"]
 #![feature(dyn_star)]
-#![feature(generic_nonzero)]
 #![feature(allocator_api)]
 
 use std::mem::MaybeUninit;

tests/codegen/intrinsics/transmute-niched.rs

@@ -3,7 +3,6 @@
 //@ [DBG] compile-flags: -C opt-level=0 -C no-prepopulate-passes
 //@ only-64bit (so I don't need to worry about usize)
 #![crate_type = "lib"]
-#![feature(generic_nonzero)]
 
 use std::mem::transmute;
 use std::num::NonZero;

tests/codegen/issues/issue-119422.rs

@@ -4,7 +4,6 @@
 //@ compile-flags: -O --edition=2021 -Zmerge-functions=disabled
 //@ only-64bit (because the LLVM type of i64 for usize shows up)
 #![crate_type = "lib"]
-#![feature(generic_nonzero)]
 
 use core::ptr::NonNull;
 use core::num::NonZero;

tests/codegen/loads.rs

@@ -1,7 +1,6 @@
 //@ compile-flags: -C no-prepopulate-passes -Zmir-opt-level=0 -O
 
 #![crate_type = "lib"]
-#![feature(generic_nonzero)]
 
 use std::mem::MaybeUninit;
 use std::num::NonZero;

tests/codegen/option-as-slice.rs

@@ -1,7 +1,6 @@
 //@ compile-flags: -O -Z randomize-layout=no
 //@ only-x86_64
 #![crate_type = "lib"]
-#![feature(generic_nonzero)]
 
 extern crate core;
 

tests/codegen/option-niche-eq.rs

@@ -1,7 +1,6 @@
 //@ compile-flags: -O -Zmerge-functions=disabled
 //@ min-llvm-version: 18
 #![crate_type = "lib"]
-#![feature(generic_nonzero)]
 
 extern crate core;
 use core::cmp::Ordering;

tests/codegen/slice-ref-equality.rs

@@ -1,6 +1,5 @@
 //@ compile-flags: -O -Zmerge-functions=disabled
 #![crate_type = "lib"]
-#![feature(generic_nonzero)]
 
 use std::num::NonZero;
 

tests/codegen/transmute-optimized.rs

@@ -1,6 +1,5 @@
 //@ compile-flags: -O -Z merge-functions=disabled
 #![crate_type = "lib"]
-#![feature(generic_nonzero)]
 
 // This tests that LLVM can optimize based on the niches in the source or
 // destination types for transmutes.

tests/debuginfo/msvc-pretty-enums.rs

@@ -132,7 +132,6 @@
 // cdb-command: dx -r2 arbitrary_discr2,d
 // cdb-check: arbitrary_discr2,d : Def [Type: enum2$<msvc_pretty_enums::ArbitraryDiscr>]
 // cdb-check:     [+0x[...]] __0              : 5678 [Type: unsigned int]
-#![feature(generic_nonzero)]
 #![feature(rustc_attrs)]
 #![feature(repr128)]
 #![feature(arbitrary_enum_discriminant)]

tests/debuginfo/numeric-types.rs

@@ -237,7 +237,6 @@
 
 // lldb-command:v nz_usize
 // lldb-check:[...] 122 { __0 = { 0 = 122 } }
-#![feature(generic_nonzero)]
 
 use std::num::*;
 use std::sync::atomic::*;

tests/mir-opt/instsimplify/combine_transmutes.rs

@@ -3,7 +3,6 @@
 #![crate_type = "lib"]
 #![feature(core_intrinsics)]
 #![feature(custom_mir)]
-#![feature(generic_nonzero)]
 
 use std::intrinsics::mir::*;
 use std::mem::{MaybeUninit, ManuallyDrop, transmute};

tests/ui/abi/compatibility.rs

@@ -64,7 +64,6 @@
   [csky] needs-llvm-components: csky
 */
 #![feature(rustc_attrs, unsized_fn_params, transparent_unions)]
-#![cfg_attr(host, feature(generic_nonzero))]
 #![cfg_attr(not(host), feature(no_core, lang_items), no_std, no_core)]
 #![allow(unused, improper_ctypes_definitions, internal_features)]
 

tests/ui/consts/const-eval/raw-bytes.rs

@@ -3,7 +3,7 @@
 // ignore-tidy-linelength
 //@ normalize-stderr-test "╾─*ALLOC[0-9]+(\+[a-z0-9]+)?(<imm>)?─*╼" -> "╾ALLOC_ID$1╼"
 #![allow(invalid_value)]
-#![feature(generic_nonzero, never_type, rustc_attrs, ptr_metadata, slice_from_ptr_range, const_slice_from_ptr_range)]
+#![feature(never_type, rustc_attrs, ptr_metadata, slice_from_ptr_range, const_slice_from_ptr_range)]
 
 use std::mem;
 use std::alloc::Layout;

tests/ui/consts/const-eval/ub-nonnull.rs

@@ -2,7 +2,7 @@
 //@ normalize-stderr-test "(the raw bytes of the constant) \(size: [0-9]*, align: [0-9]*\)" -> "$1 (size: $$SIZE, align: $$ALIGN)"
 //@ normalize-stderr-test "([0-9a-f][0-9a-f] |╾─*ALLOC[0-9]+(\+[a-z0-9]+)?─*╼ )+ *│.*" -> "HEX_DUMP"
 #![allow(invalid_value)] // make sure we cannot allow away the errors tested here
-#![feature(generic_nonzero, rustc_attrs, ptr_metadata)]
+#![feature(rustc_attrs, ptr_metadata)]
 
 use std::mem;
 use std::ptr::NonNull;

tests/ui/consts/const-eval/valid-const.rs

@@ -1,7 +1,6 @@
 //@ check-pass
 //
 // Some constants that *are* valid
-#![feature(generic_nonzero)]
 
 use std::mem;
 use std::ptr::NonNull;

tests/ui/consts/tuple-struct-constructors.rs

@@ -1,7 +1,6 @@
 //@ run-pass
 //
 // https://github.com/rust-lang/rust/issues/41898
-#![feature(generic_nonzero)]
 
 use std::num::NonZero;
 

tests/ui/intrinsics/panic-uninitialized-zeroed.rs

@@ -7,7 +7,6 @@
 //
 // This test checks panic emitted from `mem::{uninitialized,zeroed}`.
 #![allow(deprecated, invalid_value)]
-#![feature(generic_nonzero)]
 #![feature(never_type)]
 
 use std::{

tests/ui/issues/issue-64593.rs

@@ -1,6 +1,5 @@
 //@ check-pass
 #![deny(improper_ctypes)]
-#![feature(generic_nonzero)]
 
 pub struct Error(std::num::NonZero<u32>);
 

tests/ui/layout/unsafe-cell-hides-niche.rs

@@ -6,7 +6,6 @@
 //@ check-pass
 //@ compile-flags: --crate-type=lib
 //@ only-x86
-#![feature(generic_nonzero)]
 #![feature(repr_simd)]
 
 use std::cell::{UnsafeCell, RefCell, Cell};

tests/ui/layout/zero-sized-array-enum-niche.rs

@@ -1,6 +1,5 @@
 //@ normalize-stderr-test "pref: Align\([1-8] bytes\)" -> "pref: $$PREF_ALIGN"
 #![crate_type = "lib"]
-#![feature(generic_nonzero)]
 #![feature(rustc_attrs)]
 
 // Various tests around the behavior of zero-sized arrays and

tests/ui/layout/zero-sized-array-enum-niche.stderr

@@ -98,7 +98,7 @@ error: layout_of(Result<[u32; 0], bool>) = Layout {
            max_repr_align: None,
            unadjusted_abi_align: Align(4 bytes),
        }
-  --> $DIR/zero-sized-array-enum-niche.rs:14:1
+  --> $DIR/zero-sized-array-enum-niche.rs:13:1
    |
 LL | type AlignedResult = Result<[u32; 0], bool>;
    | ^^^^^^^^^^^^^^^^^^
@@ -227,7 +227,7 @@ error: layout_of(MultipleAlignments) = Layout {
            max_repr_align: None,
            unadjusted_abi_align: Align(4 bytes),
        }
-  --> $DIR/zero-sized-array-enum-niche.rs:22:1
+  --> $DIR/zero-sized-array-enum-niche.rs:21:1
    |
 LL | enum MultipleAlignments {
    | ^^^^^^^^^^^^^^^^^^^^^^^
@@ -332,7 +332,7 @@ error: layout_of(Result<[u32; 0], Packed<NonZero<u16>>>) = Layout {
            max_repr_align: None,
            unadjusted_abi_align: Align(4 bytes),
        }
-  --> $DIR/zero-sized-array-enum-niche.rs:38:1
+  --> $DIR/zero-sized-array-enum-niche.rs:37:1
    |
 LL | type NicheLosesToTagged = Result<[u32; 0], Packed<std::num::NonZero<u16>>>;
    | ^^^^^^^^^^^^^^^^^^^^^^^
@@ -441,7 +441,7 @@ error: layout_of(Result<[u32; 0], Packed<U16IsZero>>) = Layout {
            max_repr_align: None,
            unadjusted_abi_align: Align(4 bytes),
        }
-  --> $DIR/zero-sized-array-enum-niche.rs:45:1
+  --> $DIR/zero-sized-array-enum-niche.rs:44:1
    |
 LL | type NicheWinsOverTagged = Result<[u32; 0], Packed<U16IsZero>>;
    | ^^^^^^^^^^^^^^^^^^^^^^^^

tests/ui/lint/clashing-extern-fn.rs

@@ -2,7 +2,6 @@
 //@ aux-build:external_extern_fn.rs
 #![crate_type = "lib"]
 #![warn(clashing_extern_declarations)]
-#![feature(generic_nonzero)]
 
 mod redeclared_different_signature {
     mod a {

tests/ui/lint/clashing-extern-fn.stderr

@@ -1,5 +1,5 @@
 warning: `extern` block uses type `Option<TransparentNoNiche>`, which is not FFI-safe
-  --> $DIR/clashing-extern-fn.rs:430:55
+  --> $DIR/clashing-extern-fn.rs:429:55
    |
 LL |             fn hidden_niche_transparent_no_niche() -> Option<TransparentNoNiche>;
    |                                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
@@ -9,7 +9,7 @@ LL |             fn hidden_niche_transparent_no_niche() -> Option<TransparentNoN
    = note: `#[warn(improper_ctypes)]` on by default
 
 warning: `extern` block uses type `Option<UnsafeCell<NonZero<usize>>>`, which is not FFI-safe
-  --> $DIR/clashing-extern-fn.rs:434:46
+  --> $DIR/clashing-extern-fn.rs:433:46
    |
 LL |             fn hidden_niche_unsafe_cell() -> Option<UnsafeCell<NonZero<usize>>>;
    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
@@ -18,7 +18,7 @@ LL |             fn hidden_niche_unsafe_cell() -> Option<UnsafeCell<NonZero<usiz
    = note: enum has no representation hint
 
 warning: `clash` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:15:13
+  --> $DIR/clashing-extern-fn.rs:14:13
    |
 LL |             fn clash(x: u8);
    |             --------------- `clash` previously declared here
@@ -35,7 +35,7 @@ LL | #![warn(clashing_extern_declarations)]
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 warning: `extern_link_name` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:53:9
+  --> $DIR/clashing-extern-fn.rs:52:9
    |
 LL |     #[link_name = "extern_link_name"]
    |     --------------------------------- `extern_link_name` previously declared here
@@ -47,7 +47,7 @@ LL |         fn extern_link_name(x: u32);
               found `unsafe extern "C" fn(u32)`
 
 warning: `some_other_extern_link_name` redeclares `some_other_new_name` with a different signature
-  --> $DIR/clashing-extern-fn.rs:56:9
+  --> $DIR/clashing-extern-fn.rs:55:9
    |
 LL |     fn some_other_new_name(x: i16);
    |     ------------------------------ `some_other_new_name` previously declared here
@@ -59,7 +59,7 @@ LL |         #[link_name = "some_other_new_name"]
               found `unsafe extern "C" fn(u32)`
 
 warning: `other_both_names_different` redeclares `link_name_same` with a different signature
-  --> $DIR/clashing-extern-fn.rs:60:9
+  --> $DIR/clashing-extern-fn.rs:59:9
    |
 LL |     #[link_name = "link_name_same"]
    |     ------------------------------- `link_name_same` previously declared here
@@ -71,7 +71,7 @@ LL |         #[link_name = "link_name_same"]
               found `unsafe extern "C" fn(u32)`
 
 warning: `different_mod` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:73:9
+  --> $DIR/clashing-extern-fn.rs:72:9
    |
 LL |         fn different_mod(x: u8);
    |         ----------------------- `different_mod` previously declared here
@@ -83,7 +83,7 @@ LL |         fn different_mod(x: u64);
               found `unsafe extern "C" fn(u64)`
 
 warning: `variadic_decl` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:83:9
+  --> $DIR/clashing-extern-fn.rs:82:9
    |
 LL |     fn variadic_decl(x: u8, ...);
    |     ---------------------------- `variadic_decl` previously declared here
@@ -95,7 +95,7 @@ LL |         fn variadic_decl(x: u8);
               found `unsafe extern "C" fn(u8)`
 
 warning: `weigh_banana` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:143:13
+  --> $DIR/clashing-extern-fn.rs:142:13
    |
 LL |             fn weigh_banana(count: *const Banana) -> u64;
    |             -------------------------------------------- `weigh_banana` previously declared here
@@ -107,7 +107,7 @@ LL |             fn weigh_banana(count: *const Banana) -> u64;
               found `unsafe extern "C" fn(*const three::Banana) -> u64`
 
 warning: `draw_point` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:172:13
+  --> $DIR/clashing-extern-fn.rs:171:13
    |
 LL |             fn draw_point(p: Point);
    |             ----------------------- `draw_point` previously declared here
@@ -119,7 +119,7 @@ LL |             fn draw_point(p: Point);
               found `unsafe extern "C" fn(sameish_members::b::Point)`
 
 warning: `origin` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:198:13
+  --> $DIR/clashing-extern-fn.rs:197:13
    |
 LL |             fn origin() -> Point3;
    |             --------------------- `origin` previously declared here
@@ -131,7 +131,7 @@ LL |             fn origin() -> Point3;
               found `unsafe extern "C" fn() -> same_sized_members_clash::b::Point3`
 
 warning: `transparent_incorrect` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:221:13
+  --> $DIR/clashing-extern-fn.rs:220:13
    |
 LL |             fn transparent_incorrect() -> T;
    |             ------------------------------- `transparent_incorrect` previously declared here
@@ -143,7 +143,7 @@ LL |             fn transparent_incorrect() -> isize;
               found `unsafe extern "C" fn() -> isize`
 
 warning: `missing_return_type` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:260:13
+  --> $DIR/clashing-extern-fn.rs:259:13
    |
 LL |             fn missing_return_type() -> usize;
    |             --------------------------------- `missing_return_type` previously declared here
@@ -155,7 +155,7 @@ LL |             fn missing_return_type();
               found `unsafe extern "C" fn()`
 
 warning: `non_zero_usize` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:278:13
+  --> $DIR/clashing-extern-fn.rs:277:13
    |
 LL |             fn non_zero_usize() -> core::num::NonZero<usize>;
    |             ------------------------------------------------ `non_zero_usize` previously declared here
@@ -167,7 +167,7 @@ LL |             fn non_zero_usize() -> usize;
               found `unsafe extern "C" fn() -> usize`
 
 warning: `non_null_ptr` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:280:13
+  --> $DIR/clashing-extern-fn.rs:279:13
    |
 LL |             fn non_null_ptr() -> core::ptr::NonNull<usize>;
    |             ---------------------------------------------- `non_null_ptr` previously declared here
@@ -179,7 +179,7 @@ LL |             fn non_null_ptr() -> *const usize;
               found `unsafe extern "C" fn() -> *const usize`
 
 warning: `option_non_zero_usize_incorrect` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:374:13
+  --> $DIR/clashing-extern-fn.rs:373:13
    |
 LL |             fn option_non_zero_usize_incorrect() -> usize;
    |             --------------------------------------------- `option_non_zero_usize_incorrect` previously declared here
@@ -191,7 +191,7 @@ LL |             fn option_non_zero_usize_incorrect() -> isize;
               found `unsafe extern "C" fn() -> isize`
 
 warning: `option_non_null_ptr_incorrect` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:376:13
+  --> $DIR/clashing-extern-fn.rs:375:13
    |
 LL |             fn option_non_null_ptr_incorrect() -> *const usize;
    |             -------------------------------------------------- `option_non_null_ptr_incorrect` previously declared here
@@ -203,7 +203,7 @@ LL |             fn option_non_null_ptr_incorrect() -> *const isize;
               found `unsafe extern "C" fn() -> *const isize`
 
 warning: `hidden_niche_transparent_no_niche` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:430:13
+  --> $DIR/clashing-extern-fn.rs:429:13
    |
 LL |             fn hidden_niche_transparent_no_niche() -> usize;
    |             ----------------------------------------------- `hidden_niche_transparent_no_niche` previously declared here
@@ -215,7 +215,7 @@ LL |             fn hidden_niche_transparent_no_niche() -> Option<TransparentNoN
               found `unsafe extern "C" fn() -> Option<TransparentNoNiche>`
 
 warning: `hidden_niche_unsafe_cell` redeclared with a different signature
-  --> $DIR/clashing-extern-fn.rs:434:13
+  --> $DIR/clashing-extern-fn.rs:433:13
    |
 LL |             fn hidden_niche_unsafe_cell() -> usize;
    |             -------------------------------------- `hidden_niche_unsafe_cell` previously declared here

tests/ui/lint/invalid_value.rs

@@ -2,7 +2,7 @@
 // in a lint.
 #![allow(deprecated)]
 #![deny(invalid_value)]
-#![feature(generic_nonzero, never_type, rustc_attrs)]
+#![feature(never_type, rustc_attrs)]
 
 use std::mem::{self, MaybeUninit};
 use std::ptr::NonNull;

tests/ui/lint/lint-ctypes-enum.rs

@@ -1,6 +1,5 @@
 #![allow(dead_code)]
 #![deny(improper_ctypes)]
-#![feature(generic_nonzero)]
 #![feature(ptr_internals)]
 #![feature(transparent_unions)]
 

tests/ui/lint/lint-ctypes-enum.stderr

@@ -1,5 +1,5 @@
 error: `extern` block uses type `U`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:61:13
+  --> $DIR/lint-ctypes-enum.rs:60:13
    |
 LL |    fn uf(x: U);
    |             ^ not FFI-safe
@@ -7,7 +7,7 @@ LL |    fn uf(x: U);
    = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
    = note: enum has no representation hint
 note: the type is defined here
-  --> $DIR/lint-ctypes-enum.rs:10:1
+  --> $DIR/lint-ctypes-enum.rs:9:1
    |
 LL | enum U {
    | ^^^^^^
@@ -18,7 +18,7 @@ LL | #![deny(improper_ctypes)]
    |         ^^^^^^^^^^^^^^^
 
 error: `extern` block uses type `B`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:62:13
+  --> $DIR/lint-ctypes-enum.rs:61:13
    |
 LL |    fn bf(x: B);
    |             ^ not FFI-safe
@@ -26,13 +26,13 @@ LL |    fn bf(x: B);
    = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
    = note: enum has no representation hint
 note: the type is defined here
-  --> $DIR/lint-ctypes-enum.rs:13:1
+  --> $DIR/lint-ctypes-enum.rs:12:1
    |
 LL | enum B {
    | ^^^^^^
 
 error: `extern` block uses type `T`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:63:13
+  --> $DIR/lint-ctypes-enum.rs:62:13
    |
 LL |    fn tf(x: T);
    |             ^ not FFI-safe
@@ -40,13 +40,13 @@ LL |    fn tf(x: T);
    = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
    = note: enum has no representation hint
 note: the type is defined here
-  --> $DIR/lint-ctypes-enum.rs:17:1
+  --> $DIR/lint-ctypes-enum.rs:16:1
    |
 LL | enum T {
    | ^^^^^^
 
 error: `extern` block uses type `u128`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:75:23
+  --> $DIR/lint-ctypes-enum.rs:74:23
    |
 LL |    fn nonzero_u128(x: Option<num::NonZero<u128>>);
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
@@ -54,7 +54,7 @@ LL |    fn nonzero_u128(x: Option<num::NonZero<u128>>);
    = note: 128-bit integers don't currently have a known stable ABI
 
 error: `extern` block uses type `i128`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:82:23
+  --> $DIR/lint-ctypes-enum.rs:81:23
    |
 LL |    fn nonzero_i128(x: Option<num::NonZero<i128>>);
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
@@ -62,7 +62,7 @@ LL |    fn nonzero_i128(x: Option<num::NonZero<i128>>);
    = note: 128-bit integers don't currently have a known stable ABI
 
 error: `extern` block uses type `Option<TransparentUnion<NonZero<u8>>>`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:87:28
+  --> $DIR/lint-ctypes-enum.rs:86:28
    |
 LL |    fn transparent_union(x: Option<TransparentUnion<num::NonZero<u8>>>);
    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
@@ -71,7 +71,7 @@ LL |    fn transparent_union(x: Option<TransparentUnion<num::NonZero<u8>>>);
    = note: enum has no representation hint
 
 error: `extern` block uses type `Option<Rust<NonZero<u8>>>`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:89:20
+  --> $DIR/lint-ctypes-enum.rs:88:20
    |
 LL |    fn repr_rust(x: Option<Rust<num::NonZero<u8>>>);
    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
@@ -80,7 +80,7 @@ LL |    fn repr_rust(x: Option<Rust<num::NonZero<u8>>>);
    = note: enum has no representation hint
 
 error: `extern` block uses type `Result<(), NonZero<i32>>`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:90:20
+  --> $DIR/lint-ctypes-enum.rs:89:20
    |
 LL |    fn no_result(x: Result<(), num::NonZero<i32>>);
    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe

tests/ui/numbers-arithmetic/overflowing-neg-nonzero.rs

@@ -3,7 +3,6 @@
 //@ ignore-emscripten no processes
 //@ compile-flags: -C debug-assertions
 #![allow(arithmetic_overflow)]
-#![feature(generic_nonzero)]
 
 use std::num::NonZero;
 

tests/ui/print_type_sizes/niche-filling.rs

@@ -15,7 +15,6 @@
 //  ^-- needed because `--pass check` does not emit the output needed.
 //      FIXME: consider using an attribute instead of side-effects.
 #![allow(dead_code)]
-#![feature(generic_nonzero)]
 #![feature(rustc_attrs)]
 
 use std::num::NonZero;

tests/ui/structs-enums/enum-null-pointer-opt.rs

@@ -1,5 +1,4 @@
 //@ run-pass
-#![feature(generic_nonzero)]
 #![feature(transparent_unions)]
 
 use std::mem::size_of;

tests/ui/structs-enums/enum-null-pointer-opt.stderr

@@ -1,5 +1,5 @@
 warning: method `dummy` is never used
-  --> $DIR/enum-null-pointer-opt.rs:11:18
+  --> $DIR/enum-null-pointer-opt.rs:10:18
    |
 LL | trait Trait { fn dummy(&self) { } }
    |       -----      ^^^^^

tests/ui/structs-enums/type-sizes.rs

@@ -2,7 +2,6 @@
 
 #![allow(non_camel_case_types)]
 #![allow(dead_code)]
-#![feature(generic_nonzero)]
 #![feature(never_type)]
 #![feature(pointer_is_aligned_to)]
 #![feature(strict_provenance)]

tests/ui/suggestions/core-std-import-order-issue-83564.rs

@@ -2,7 +2,6 @@
 //
 // This is a regression test for #83564.
 // For some reason, Rust 2018 or higher is required to reproduce the bug.
-#![feature(generic_nonzero)]
 
 fn main() {
     //~^ HELP consider importing one of these items

tests/ui/suggestions/core-std-import-order-issue-83564.stderr

@@ -1,5 +1,5 @@
 error[E0433]: failed to resolve: use of undeclared type `NonZero`
-  --> $DIR/core-std-import-order-issue-83564.rs:9:14
+  --> $DIR/core-std-import-order-issue-83564.rs:8:14
    |
 LL |     let _x = NonZero::new(5u32).unwrap();
    |              ^^^^^^^ use of undeclared type `NonZero`

tests/ui/traits/next-solver/specialization-transmute.rs

@@ -1,6 +1,5 @@
 //@ compile-flags: -Znext-solver
 //~^ ERROR cannot normalize `<T as Default>::Id: '_`
-#![feature(generic_nonzero)]
 #![feature(specialization)]
 //~^ WARN the feature `specialization` is incomplete
 

tests/ui/traits/next-solver/specialization-transmute.stderr

@@ -1,5 +1,5 @@
 warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
-  --> $DIR/specialization-transmute.rs:4:12
+  --> $DIR/specialization-transmute.rs:3:12
    |
 LL | #![feature(specialization)]
    |            ^^^^^^^^^^^^^^
@@ -11,31 +11,31 @@ LL | #![feature(specialization)]
 error: cannot normalize `<T as Default>::Id: '_`
 
 error[E0284]: type annotations needed: cannot satisfy `<T as Default>::Id == _`
-  --> $DIR/specialization-transmute.rs:16:23
+  --> $DIR/specialization-transmute.rs:15:23
    |
 LL |     fn intu(&self) -> &Self::Id {
    |                       ^^^^^^^^^ cannot satisfy `<T as Default>::Id == _`
 
 error[E0284]: type annotations needed: cannot satisfy `T <: <T as Default>::Id`
-  --> $DIR/specialization-transmute.rs:18:9
+  --> $DIR/specialization-transmute.rs:17:9
    |
 LL |         self
    |         ^^^^ cannot satisfy `T <: <T as Default>::Id`
 
 error[E0284]: type annotations needed: cannot satisfy `<u8 as Default>::Id == Option<NonZero<u8>>`
-  --> $DIR/specialization-transmute.rs:29:13
+  --> $DIR/specialization-transmute.rs:28:13
    |
 LL |     let s = transmute::<u8, Option<NonZero<u8>>>(0);
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot satisfy `<u8 as Default>::Id == Option<NonZero<u8>>`
    |
 note: required by a bound in `transmute`
-  --> $DIR/specialization-transmute.rs:22:25
+  --> $DIR/specialization-transmute.rs:21:25
    |
 LL | fn transmute<T: Default<Id = U>, U: Copy>(t: T) -> U {
    |                         ^^^^^^ required by this bound in `transmute`
 
 error[E0282]: type annotations needed
-  --> $DIR/specialization-transmute.rs:14:23
+  --> $DIR/specialization-transmute.rs:13:23
    |
 LL |     default type Id = T;
    |                       ^ cannot infer type for associated type `<T as Default>::Id`