Increase the MSRV from 1.63 to 1.65

.github/workflows/main.yml

@@ -25,17 +25,17 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        build: [stable, nightly, 1.63]
+        build: [stable, nightly, 1.65]
         include:
           - build: stable
             os: ubuntu-latest
             rust: stable
           - build: nightly
             os: ubuntu-latest
             rust: nightly
-          - build: 1.63
+          - build: 1.65
             os: ubuntu-latest
-            rust: 1.63
+            rust: 1.65
 
     env:
       # -D warnings is commented out in our install-rust action; re-add it here.
@@ -48,19 +48,16 @@ jobs:
       with:
         toolchain: ${{ matrix.rust }}
 
-    - name: Use specific dependency versions for Rust 1.63 compatibility.
-      if: matrix.rust == '1.63'
+    - name: Use specific dependency versions for Rust 1.65 compatibility.
+      if: matrix.rust == '1.65'
       run: |
-        cargo update --package=dashmap --precise 5.4.0
-        cargo update --package=regex --precise=1.9.0
         cargo update --package=half --precise=2.2.1
         cargo update --package=flate2 --precise=1.0.35
         cargo update --package=syn --precise=2.0.106
         cargo update --package=textwrap --precise=0.16.1
-        cargo update --package=once_cell --precise=1.20.3
-        cargo update --package=parking_lot --precise=0.12.3
-        cargo update --package=parking_lot_core --precise=0.9.10
-        cargo update --package=lock_api --precise=0.4.12
+        cargo update --package=parking_lot --precise=0.12.4
+        cargo update --package=parking_lot_core --precise=0.9.11
+        cargo update --package=lock_api --precise=0.4.13
         cargo update --package=rayon --precise=1.10.0
         cargo update --package=rayon-core --precise=1.12.1
         cargo update --package=windows-sys --precise=0.60.2
@@ -107,13 +104,13 @@ jobs:
         aarch64-linux-android
         aarch64-apple-ios
         i686-pc-windows-msvc
-    - if: matrix.rust != '1.63'
+    - if: matrix.rust != '1.65'
       run: >
         rustup target add
         wasm32-wasip1
         wasm32-wasip2
         x86_64-unknown-fuchsia
-    - if: matrix.rust == '1.63'
+    - if: matrix.rust == '1.65'
       run: rustup target add x86_64-fuchsia
 
     - run: cargo check --workspace --release -vv --all-targets
@@ -129,13 +126,13 @@ jobs:
     - run: cargo check --workspace --release -vv --target=x86_64-apple-darwin --features=all-apis --all-targets
     - run: cargo check --workspace --release -vv --target=x86_64-unknown-freebsd --features=all-apis --all-targets
     - run: cargo check --workspace --release -vv --target=x86_64-unknown-netbsd --features=all-apis --all-targets
-    - if: matrix.rust != '1.63'
+    - if: matrix.rust != '1.65'
       run: cargo check --workspace --release -vv --target=wasm32-wasip1 --features=all-apis
-    - if: matrix.rust != '1.63'
+    - if: matrix.rust != '1.65'
       run: cargo check --workspace --release -vv --target=wasm32-wasip2 --features=all-apis
-    - if: matrix.rust != '1.63'
+    - if: matrix.rust != '1.65'
       run: cargo check --workspace --release -vv --target=x86_64-unknown-fuchsia --features=all-apis --all-targets
-    - if: matrix.rust == '1.63'
+    - if: matrix.rust == '1.65'
       run: cargo check --workspace --release -vv --target=x86_64-fuchsia --features=all-apis --all-targets
     - run: cargo check --workspace --release -vv --target=x86_64-unknown-illumos --features=all-apis --all-targets
     - run: cargo check --workspace --release -vv --target=i686-unknown-linux-gnu --features=all-apis --all-targets
@@ -291,14 +288,14 @@ jobs:
             powerpc-linux-stable,
             powerpc64le-linux-stable,
             arm-linux-stable,
-            ubuntu-1.63,
-            i686-linux-1.63,
-            aarch64-linux-1.63,
-            riscv64-linux-1.63,
-            s390x-linux-1.63,
+            ubuntu-1.65,
+            i686-linux-1.65,
+            aarch64-linux-1.65,
+            riscv64-linux-1.65,
+            s390x-linux-1.65,
             powerpc64le-linux,
-            powerpc64le-linux-1.63,
-            arm-linux-1.63,
+            powerpc64le-linux-1.65,
+            arm-linux-1.65,
             macos-latest,
             macos-15-intel,
             macos-14,
@@ -437,64 +434,64 @@ jobs:
             qemu: qemu-arm
             qemu_args: -L /usr/arm-linux-gnueabi
             qemu_target: arm-linux-user
-          - build: ubuntu-1.63
+          - build: ubuntu-1.65
             os: ubuntu-latest
-            rust: 1.63
-          - build: i686-linux-1.63
+            rust: 1.65
+          - build: i686-linux-1.65
             os: ubuntu-latest
-            rust: 1.63
+            rust: 1.65
             target: i686-unknown-linux-gnu
             gcc_package: gcc-i686-linux-gnu
             gcc: i686-linux-gnu-gcc
             libc_package: libc-dev-i386-cross
-          - build: aarch64-linux-1.63
+          - build: aarch64-linux-1.65
             os: ubuntu-latest
-            rust: 1.63
+            rust: 1.65
             target: aarch64-unknown-linux-gnu
             gcc_package: gcc-aarch64-linux-gnu
             gcc: aarch64-linux-gnu-gcc
             qemu: qemu-aarch64
             qemu_args: -L /usr/aarch64-linux-gnu
             qemu_target: aarch64-linux-user
-          - build: riscv64-linux-1.63
+          - build: riscv64-linux-1.65
             os: ubuntu-latest
-            rust: 1.63
+            rust: 1.65
             target: riscv64gc-unknown-linux-gnu
             gcc_package: gcc-riscv64-linux-gnu
             gcc: riscv64-linux-gnu-gcc
             qemu: qemu-riscv64
             qemu_args: -L /usr/riscv64-linux-gnu
             qemu_target: riscv64-linux-user
-          - build: s390x-linux-1.63
+          - build: s390x-linux-1.65
             os: ubuntu-latest
-            rust: 1.63
+            rust: 1.65
             target: s390x-unknown-linux-gnu
             gcc_package: gcc-s390x-linux-gnu
             gcc: s390x-linux-gnu-gcc
             qemu: qemu-s390x
             qemu_args: -L /usr/s390x-linux-gnu
             qemu_target: s390x-linux-user
-          - build: powerpc-linux-1.63
+          - build: powerpc-linux-1.65
             os: ubuntu-latest
-            rust: 1.63
+            rust: 1.65
             target: powerpc-unknown-linux-gnu
             gcc_package: gcc-powerpc-linux-gnu
             gcc: powerpc-linux-gnu-gcc
             qemu: qemu-ppc
             qemu_args: -L /usr/powerpc-linux-gnu
             qemu_target: ppc-linux-user
-          - build: powerpc64le-linux-1.63
+          - build: powerpc64le-linux-1.65
             os: ubuntu-latest
-            rust: 1.63
+            rust: 1.65
             target: powerpc64le-unknown-linux-gnu
             gcc_package: gcc-powerpc64le-linux-gnu
             gcc: powerpc64le-linux-gnu-gcc
             qemu: qemu-ppc64le
             qemu_args: -L /usr/powerpc64le-linux-gnu
             qemu_target: ppc64le-linux-user
-          - build: arm-linux-1.63
+          - build: arm-linux-1.65
             os: ubuntu-latest
-            rust: 1.63
+            rust: 1.65
             target: armv5te-unknown-linux-gnueabi
             gcc_package: gcc-arm-linux-gnueabi
             gcc: arm-linux-gnueabi-gcc
@@ -585,19 +582,16 @@ jobs:
         ninja -C build install
       if: matrix.qemu != '' && matrix.os == 'ubuntu-latest'
 
-    - name: Use specific dependency versions for Rust 1.63 compatibility.
-      if: matrix.rust == '1.63'
+    - name: Use specific dependency versions for Rust 1.65 compatibility.
+      if: matrix.rust == '1.65'
       run: |
-        cargo update --package=dashmap --precise 5.4.0
-        cargo update --package=regex --precise=1.9.0
         cargo update --package=half --precise=2.2.1
         cargo update --package=flate2 --precise=1.0.35
         cargo update --package=syn --precise=2.0.106
         cargo update --package=textwrap --precise=0.16.1
-        cargo update --package=once_cell --precise=1.20.3
-        cargo update --package=parking_lot --precise=0.12.3
-        cargo update --package=parking_lot_core --precise=0.9.10
-        cargo update --package=lock_api --precise=0.4.12
+        cargo update --package=parking_lot --precise=0.12.4
+        cargo update --package=parking_lot_core --precise=0.9.11
+        cargo update --package=lock_api --precise=0.4.13
         cargo update --package=rayon --precise=1.10.0
         cargo update --package=rayon-core --precise=1.12.1
         cargo update --package=windows-sys --precise=0.60.2

Cargo.toml

@@ -13,7 +13,7 @@ edition = "2021"
 keywords = ["api", "file", "network", "safe", "syscall"]
 categories = ["os::unix-apis", "date-and-time", "filesystem", "network-programming"]
 include = ["src", "build.rs", "Cargo.toml", "COPYRIGHT", "LICENSE*", "/*.md", "benches"]
-rust-version = "1.63"
+rust-version = "1.65"
 
 [hints]
 # Most users use a fraction of the rustix API surface area, so this reduces compilation times
@@ -268,7 +268,6 @@ check-cfg = [
     'cfg(rustc_diagnostics)',
     'cfg(solarish)',
     'cfg(staged_api)',
-    'cfg(static_assertions)',
     'cfg(thumb_mode)',
     'cfg(wasi)',
     'cfg(wasi_ext)',

README.md

@@ -33,7 +33,7 @@ more portable APIs built on this functionality, see the [`cap-std`], [`memfd`],
 
  * linux_raw, which uses raw Linux system calls and vDSO calls, and is
    supported on Linux on x86-64, x86, aarch64, riscv64gc, powerpc64le,
-   arm (v5 onwards), mipsel, and mips64el, with stable, nightly, and 1.63 Rust.
+   arm (v5 onwards), mipsel, and mips64el, with stable, nightly, and 1.65 Rust.
     - By being implemented entirely in Rust, avoiding `libc`, `errno`, and pthread
       cancellation, and employing some specialized optimizations, most functions
       compile down to very efficient code, which can often be fully inlined into
@@ -157,9 +157,11 @@ safety types rather than `RawFd`, and the flags parameters to functions such as
 
 ## Minimum Supported Rust Version (MSRV)
 
-This crate currently works on the version of [Rust on Debian stable], which is
-currently [Rust 1.63]. This policy may change in the future, in minor version
-releases, so users using a fixed version of Rust should pin to a specific
+This crate has a Minimum Supported Rust Version (MSRV) of [Rust 1.65].
+
+The MSRV may change in future minor versions; however, the current policy is
+that it will not be increased beyond the version of [Rust on Debian stable].
+Users who rely on a fixed version of Rust should pin to a specific
 version of this crate.
 
 ## Minimum Linux Version
@@ -172,7 +174,7 @@ The specifics of this policy may change in the future, but we intend it to
 always reflect “very old” Linux versions.
 
 [MSRV]: #minimum-supported-rust-version-msrv
-[Rust 1.63]: https://blog.rust-lang.org/2022/08/11/Rust-1.63.0.html
+[Rust 1.65]: https://blog.rust-lang.org/2022/11/03/Rust-1.65.0/
 [any current Rust target]: https://doc.rust-lang.org/nightly/rustc/platform-support.html
 [kernel.org]: https://www.kernel.org/releases.html
 [Rust on Debian stable]: https://packages.debian.org/stable/rust/rustc

build.rs

@@ -79,11 +79,6 @@ fn main() {
         use_feature_or_nothing("error_in_core");
     }
 
-    // Feature needed for testing.
-    if use_static_assertions() {
-        use_feature("static_assertions");
-    }
-
     // `LowerExp`/`UpperExp` for `NonZeroI32` etc.
     if has_lower_upper_exp_for_non_zero() {
         use_feature("lower_upper_exp_for_non_zero");
@@ -197,11 +192,6 @@ fn main() {
     println!("cargo:rerun-if-env-changed=CARGO_CFG_MIRI");
 }
 
-fn use_static_assertions() -> bool {
-    // `offset_from` was made const in Rust 1.65.
-    can_compile("const unsafe fn foo(p: *const u8) -> isize { p.offset_from(p) }")
-}
-
 fn use_thumb_mode() -> bool {
     // In thumb mode, r7 is reserved.
     !can_compile("pub unsafe fn f() { core::arch::asm!(\"udf #16\", in(\"r7\") 0); }")

src/lib.rs

@@ -153,15 +153,10 @@ extern crate rustc_std_workspace_alloc as alloc;
 #[cfg(all(feature = "alloc", not(feature = "rustc-dep-of-std")))]
 extern crate alloc;
 
-// Use `static_assertions` macros if we have them, or a polyfill otherwise.
-#[cfg(all(test, static_assertions))]
+#[cfg(test)]
 #[macro_use]
 #[allow(unused_imports)]
 extern crate static_assertions;
-#[cfg(all(test, not(static_assertions)))]
-#[macro_use]
-#[allow(unused_imports)]
-mod static_assertions;
 
 pub mod buffer;
 #[cfg(not(windows))]