Bump MSRV to 1.63 for I/O safety

Signed-off-by: Alex Saveau <saveau.alexandre@gmail.com>

.cirrus.yml

@@ -9,7 +9,7 @@ env:
   RUSTDOCFLAGS: -D warnings
   TOOL: cargo
   # The MSRV
-  TOOLCHAIN: 1.56.1
+  TOOLCHAIN: 1.63
   ZFLAGS:
 
 # Tests that don't require executing the build binaries
@@ -140,23 +140,24 @@ task:
   matrix:
     - name: Linux aarch64
       arm_container:
-        image: rust:1.56
+        image: rust:1.63
       env:
         RUSTFLAGS: --cfg graviton -D warnings
         TARGET: aarch64-unknown-linux-gnu
     - name: Linux x86_64
       container:
-        image: rust:1.56
+        image: rust:1.63
       env:
         TARGET: x86_64-unknown-linux-gnu
     - name: Linux x86_64 musl
       container:
-        image: rust:1.56
+        image: rust:1.63
       env:
         TARGET: x86_64-unknown-linux-musl
   setup_script:
     - rustup target add $TARGET
-    - rustup component add clippy
+    - rustup toolchain install $TOOLCHAIN --profile minimal --target $TARGET
+    - rustup component add --toolchain $TOOLCHAIN clippy
   << : *TEST
   before_cache_script: rm -rf $CARGO_HOME/registry/index
 
@@ -176,7 +177,7 @@ task:
 # Tasks for cross-compiling, but no testing
 task:
   container:
-    image: rust:1.56
+    image: rust:1.63
   env:
     BUILD: check
     HOST: x86_64-unknown-linux-gnu
@@ -250,7 +251,7 @@ task:
 
 task:
   container:
-    image: rust:1.56
+    image: rust:1.63
   env:
     BUILD: check
   name: Redox x86_64

CHANGELOG.md

@@ -71,6 +71,8 @@ This project adheres to [Semantic Versioning](https://semver.org/).
   ([#1870](https://github.com/nix-rust/nix/pull/1870))
 - The `length` argument of `sys::mman::mmap` is now of type `NonZeroUsize`.
   ([#1873](https://github.com/nix-rust/nix/pull/1873))
+- The MSRV is now 1.63
+  ([#1862](https://github.com/nix-rust/nix/pull/1862))
 
 ### Fixed
 

Cargo.toml

@@ -3,7 +3,7 @@ name        = "nix"
 description = "Rust friendly bindings to *nix APIs"
 edition     = "2018"
 version     = "0.26.1"
-rust-version = "1.56"
+rust-version = "1.63"
 authors     = ["The nix-rust Project Developers"]
 repository  = "https://github.com/nix-rust/nix"
 license     = "MIT"

README.md

@@ -89,7 +89,7 @@ Tier 3:
 
 ## Minimum Supported Rust Version (MSRV)
 
-nix is supported on Rust 1.56.1 and higher.  Its MSRV will not be
+nix is supported on Rust 1.63 and higher.  Its MSRV will not be
 changed in the future without bumping the major or minor version.
 
 ## Contributing