Upgrade Rust toolchain to 2025-07-24

Relevant upstream PR:
- rust-lang/rust#143833 (Ban projecting into SIMD types
  [MCP838])

Author: tautschnig

library/kani/src/models/mod.rs

@@ -247,7 +247,7 @@ mod test {
     }
 
     #[repr(simd)]
-    #[derive(Clone, Debug)]
+    #[derive(Copy, Clone, Debug)]
     struct CustomMask<T, const LANES: usize>([T; LANES]);
 
     /// Check that the bitmask model can handle odd size SIMD arrays.
@@ -276,15 +276,14 @@ mod test {
     /// Compare the value returned by our model and the simd_bitmask intrinsic.
     fn check_bitmask<T, U, E, const LANES: usize>(mask: T)
     where
-        T: Clone,
+        T: Clone + Copy,
         U: PartialEq + Debug,
         E: kani_intrinsic::MaskElement,
         [u8; kani_intrinsic::mask_len(LANES)]: Sized,
     {
-        assert_eq!(
-            unsafe { kani_intrinsic::simd_bitmask::<_, U, E, LANES>(mask.clone()) },
-            unsafe { simd_bitmask::<T, U>(mask) }
-        );
+        assert_eq!(unsafe { kani_intrinsic::simd_bitmask::<_, U, E, LANES>(mask) }, unsafe {
+            simd_bitmask::<T, U>(mask)
+        });
     }
 
     /// Similar to portable simd_harness.

rust-toolchain.toml

@@ -2,5 +2,5 @@
 # SPDX-License-Identifier: Apache-2.0 OR MIT
 
 [toolchain]
-channel = "nightly-2025-07-21"
+channel = "nightly-2025-07-24"
 components = ["llvm-tools", "rustc-dev", "rust-src", "rustfmt"]

tests/expected/intrinsics/simd-arith-overflows/main.rs

@@ -7,7 +7,7 @@ use std::intrinsics::simd::{simd_add, simd_mul, simd_sub};
 
 #[repr(simd)]
 #[allow(non_camel_case_types)]
-#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+#[derive(Clone, Copy)]
 pub struct i8x2([i8; 2]);
 
 #[kani::proof]

tests/expected/intrinsics/simd-cmp-result-type-is-diff-size/main.rs

@@ -8,27 +8,33 @@ use std::intrinsics::simd::simd_eq;
 
 #[repr(simd)]
 #[allow(non_camel_case_types)]
-#[derive(Clone, Copy, PartialEq, Eq)]
+#[derive(Clone, Copy)]
 pub struct i64x2([i64; 2]);
 
 #[repr(simd)]
 #[allow(non_camel_case_types)]
-#[derive(Clone, Copy, PartialEq, Eq)]
+#[derive(Clone, Copy)]
 pub struct u64x2([u64; 2]);
 
 #[repr(simd)]
 #[allow(non_camel_case_types)]
-#[derive(Clone, Copy, PartialEq, Eq)]
+#[derive(Clone, Copy)]
 pub struct u32x4([u32; 4]);
 
+impl u32x4 {
+    fn into_array(self) -> [u32; 4] {
+        unsafe { std::mem::transmute(self) }
+    }
+}
+
 #[kani::proof]
 fn main() {
     let x = u64x2([0, 0]);
     let y = u64x2([0, 1]);
 
     unsafe {
         let invalid_simd: u32x4 = simd_eq(x, y);
-        assert!(invalid_simd == u32x4([u32::MAX, u32::MAX, 0, 0]));
+        assert!(invalid_simd.into_array() == u32x4([u32::MAX, u32::MAX, 0, 0]).into_array());
         // ^^^^ The code above fails to type-check in Rust with the error:
         // ```
         // error[E0511]: invalid monomorphization of `simd_eq` intrinsic: expected

tests/expected/intrinsics/simd-div-div-zero/main.rs

@@ -7,7 +7,7 @@ use std::intrinsics::simd::simd_div;
 
 #[repr(simd)]
 #[allow(non_camel_case_types)]
-#[derive(Clone, Copy, PartialEq, Eq)]
+#[derive(Clone, Copy)]
 pub struct i32x2([i32; 2]);
 
 #[kani::proof]

tests/expected/intrinsics/simd-div-rem-overflow/expected

@@ -1,8 +1,8 @@
 FAILURE\
 attempt to compute simd_div which would overflow
 UNREACHABLE\
-assertion failed: quotients.0[0] == quotients.0[1]
+assertion failed: quotients.into_array()[0] == quotients.into_array()[1]
 FAILURE\
 attempt to compute simd_rem which would overflow
 UNREACHABLE\
-assertion failed: remainders.0[0] == remainders.0[1]
+assertion failed: remainders.into_array()[0] == remainders.into_array()[1]

tests/expected/intrinsics/simd-div-rem-overflow/main.rs

@@ -7,9 +7,15 @@ use std::intrinsics::simd::{simd_div, simd_rem};
 
 #[repr(simd)]
 #[allow(non_camel_case_types)]
-#[derive(Clone, Copy, PartialEq, Eq)]
+#[derive(Clone, Copy)]
 pub struct i32x2([i32; 2]);
 
+impl i32x2 {
+    fn into_array(self) -> [i32; 2] {
+        unsafe { std::mem::transmute(self) }
+    }
+}
+
 unsafe fn do_simd_div(dividends: i32x2, divisors: i32x2) -> i32x2 {
     simd_div(dividends, divisors)
 }
@@ -25,7 +31,7 @@ fn test_simd_div_overflow() {
     let divisor = -1;
     let divisors = i32x2([divisor, divisor]);
     let quotients = unsafe { do_simd_div(dividends, divisors) };
-    assert_eq!(quotients.0[0], quotients.0[1]);
+    assert_eq!(quotients.into_array()[0], quotients.into_array()[1]);
 }
 
 #[kani::proof]
@@ -35,5 +41,5 @@ fn test_simd_rem_overflow() {
     let divisor = -1;
     let divisors = i32x2([divisor, divisor]);
     let remainders = unsafe { do_simd_rem(dividends, divisors) };
-    assert_eq!(remainders.0[0], remainders.0[1]);
+    assert_eq!(remainders.into_array()[0], remainders.into_array()[1]);
 }

tests/expected/intrinsics/simd-extract-wrong-type/main.rs

@@ -9,7 +9,7 @@ use std::intrinsics::simd::simd_extract;
 
 #[repr(simd)]
 #[allow(non_camel_case_types)]
-#[derive(Clone, Copy, PartialEq, Eq)]
+#[derive(Clone, Copy)]
 pub struct i64x2([i64; 2]);
 
 #[kani::proof]

tests/expected/intrinsics/simd-insert-wrong-type/main.rs

@@ -9,7 +9,7 @@ use std::intrinsics::simd::simd_insert;
 
 #[repr(simd)]
 #[allow(non_camel_case_types)]
-#[derive(Clone, Copy, PartialEq, Eq)]
+#[derive(Clone, Copy)]
 pub struct i64x2([i64; 2]);
 
 #[kani::proof]

tests/expected/intrinsics/simd-rem-div-zero/main.rs

@@ -7,7 +7,7 @@ use std::intrinsics::simd::simd_rem;
 
 #[repr(simd)]
 #[allow(non_camel_case_types)]
-#[derive(Clone, Copy, PartialEq, Eq)]
+#[derive(Clone, Copy)]
 pub struct i32x2([i32; 2]);
 
 #[kani::proof]