bump msrv to 1.78

.github/workflows/ci.yml

@@ -83,7 +83,7 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v3
       - name: Rust toolchain
-        uses: dtolnay/rust-toolchain@1.72.0
+        uses: dtolnay/rust-toolchain@1.78.0
       - name: Get date for registry cache
         id: date
         run: echo "::set-output name=date::$(date +'%Y-%m-%d')"

Cargo.toml

@@ -10,7 +10,7 @@ readme = "README.md"
 homepage = "https://smithay.github.io/"
 keywords = ["wayland", "compositor", "graphics", "server"]
 categories = ["gui"]
-rust-version = "1.72.0"
+rust-version = "1.78.0"
 
 [package.metadata.docs.rs]
 features = ["test_all_features"]

clippy.toml

@@ -1,4 +1,4 @@
-msrv = "1.72.0"
+msrv = "1.78.0"
 type-complexity-threshold = 400
 
 disallowed-macros = [

src/wayland/shm/pool.rs

@@ -48,7 +48,7 @@ thread_local!(static SIGBUS_GUARD: Cell<(*const MemMap, bool)> = const { Cell::n
 
 /// SAFETY:
 /// This will be only set in the `SIGBUS_INIT` closure, hence only once!
-static mut OLD_SIGBUS_HANDLER: Option<libc::sigaction> = None;
+static mut OLD_SIGBUS_HANDLER: libc::sigaction = unsafe { mem::zeroed() };
 static SIGBUS_INIT: Once = Once::new();
 
 #[derive(Debug)]
@@ -313,7 +313,7 @@ unsafe fn place_sigbus_handler() {
         action.sa_sigaction = sigbus_handler as _;
         action.sa_flags = libc::SA_SIGINFO | libc::SA_NODEFER;
 
-        let old_action = OLD_SIGBUS_HANDLER.insert(mem::zeroed());
+        let old_action = std::ptr::addr_of_mut!(OLD_SIGBUS_HANDLER);
         if libc::sigaction(libc::SIGBUS, &action, old_action) == -1 {
             let e = rustix::io::Errno::from_raw_os_error(errno::errno().0);
             panic!("sigaction failed for SIGBUS handler: {:?}", e);
@@ -326,7 +326,7 @@ unsafe fn reraise_sigbus() {
     unsafe {
         libc::sigaction(
             libc::SIGBUS,
-            OLD_SIGBUS_HANDLER.as_ref().unwrap(),
+            std::ptr::addr_of_mut!(OLD_SIGBUS_HANDLER),
             ptr::null_mut(),
         );
         libc::raise(libc::SIGBUS);