bump MSRV to 1.59

Author: skibon02

.github/bors.toml

@@ -3,7 +3,7 @@ delete_merged_branches = true
 required_approvals = 1
 status = [
   "ci-linux (stable)",
-  "ci-linux (1.38.0)",
+  "ci-linux (1.59.0)",
   "rustfmt",
   "clippy",
 ]

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
 
         include:
           # Test MSRV
-          - rust: 1.38.0
+          - rust: 1.59.0
             features: ""
 
           # Test nightly but don't fail

Cargo.toml

@@ -28,20 +28,7 @@ features = [ "derive" ]
 optional = true
 
 [dependencies.serde_json]
-version = ">=1.0.0,<=1.0.100"
-optional = true
-
-
-[dependencies.nb]
-version = "=0.1.2"
-optional = true
-
-[dependencies.proc-macro2]
-version = "=1.0.65"
-optional = true
-
-[dependencies.serde_derive]
-version = "=1.0.156"
+version = "1"
 optional = true
 
 [features]

README.md

@@ -11,7 +11,7 @@ This project is developed and maintained by the [Cortex-M team][team].
 
 ## Minimum Supported Rust Version (MSRV)
 
-This crate is guaranteed to compile on stable Rust 1.38 and up. It might compile with older versions but that may change in any new patch release.
+This crate is guaranteed to compile on stable Rust 1.59 and up. It might compile with older versions but that may change in any new patch release.
 
 ## License
 

src/lib.rs

@@ -63,7 +63,7 @@
 //!
 //! # Minimum Supported Rust Version (MSRV)
 //!
-//! This crate is guaranteed to compile on stable Rust 1.38 and up. It *might*
+//! This crate is guaranteed to compile on stable Rust 1.59 and up. It *might*
 //! compile with older versions but that may change in any new patch release.
 
 #![deny(missing_docs)]

src/peripheral/scb.rs

@@ -173,10 +173,7 @@ impl SCB {
         let icsr = unsafe { ptr::read(&(*SCB::PTR).icsr as *const _ as *const u32) };
 
         // NOTE(unsafe): Assume correctly selected target.
-        match VectActive::from(icsr as u8) {
-            Some(val) => val,
-            None => unsafe { core::hint::unreachable_unchecked() },
-        }
+        unsafe { VectActive::from(icsr as u8).unwrap_unchecked() }
     }
 }
 

xtask/tests/ci.rs

@@ -58,8 +58,6 @@ fn check_crates_build(is_nightly: bool, is_msrv: bool) {
             // Relies on all crates in this repo to use the same convention.
             let should_use_feature = |feat: &str| {
                 match feat {
-                    // critical-section doesn't build in 1.38 due to using `#[doc(include_str!(..))]`
-                    "critical-section-single-core" => !is_msrv,
                     // This is nightly-only, so don't use it on stable.
                     "inline-asm" => is_nightly,
                     // This only affects thumbv7em targets.
@@ -105,7 +103,7 @@ fn main() {
 
     let output = Command::new("rustc").arg("-V").output().unwrap();
     let is_nightly = str::from_utf8(&output.stdout).unwrap().contains("nightly");
-    let is_msrv = str::from_utf8(&output.stdout).unwrap().contains("1.38");
+    let is_msrv = str::from_utf8(&output.stdout).unwrap().contains("1.59");
 
     check_crates_build(is_nightly, is_msrv);