Update nightly rustc

.github/workflows/ci.yml

@@ -45,7 +45,7 @@ env:
     --package=objc2-encode
     --package=objc2-proc-macros
   # The current nightly Rust version. Keep this synced with `rust-toolchain.toml`
-  CURRENT_NIGHTLY: nightly-2023-11-22
+  CURRENT_NIGHTLY: nightly-2024-01-15
   # Various features that we'd usually want to test with
   #
   # Note: The `exception` feature is not enabled here, since it requires

crates/header-translator/src/main.rs

@@ -158,11 +158,7 @@ fn main() -> Result<(), BoxError> {
         &str = "# This section has been automatically generated by `objc2`'s `header-translator`.\n# DO NOT EDIT\n";
     let mut cargo_toml = {
         let path = crate_src.parent().unwrap().join("Cargo.toml");
-        fs::OpenOptions::new()
-            .read(true)
-            .write(true)
-            .append(true)
-            .open(path)?
+        fs::OpenOptions::new().read(true).append(true).open(path)?
     };
     // find the features section
     if let Some(pos) = {

crates/objc2/src/__macro_helpers/declare_class.rs

@@ -24,6 +24,7 @@ use crate::mutability;
 #[doc(hidden)]
 #[repr(transparent)]
 #[derive(Debug)]
+#[allow(dead_code)]
 pub struct IdReturnValue(pub(crate) *mut AnyObject);
 
 // SAFETY: `IdReturnValue` is `#[repr(transparent)]`

crates/objc2/src/rc/autorelease.rs

@@ -163,7 +163,7 @@ pub struct AutoreleasePool<'pool> {
 thread_local! {
     /// We track the thread's pools to verify that object lifetimes are only
     /// taken from the innermost pool.
-    static POOLS: RefCell<Vec<*mut c_void>> = RefCell::new(Vec::new());
+    static POOLS: RefCell<Vec<*mut c_void>> = const { RefCell::new(Vec::new()) };
 }
 
 impl<'pool> AutoreleasePool<'pool> {

crates/objc2/src/rc/id_forwarding_impls.rs

@@ -21,6 +21,7 @@ use std::io;
 use super::Id;
 use crate::mutability::IsMutable;
 
+#[allow(clippy::unconditional_recursion)]
 impl<T: PartialEq + ?Sized> PartialEq for Id<T> {
     #[inline]
     fn eq(&self, other: &Self) -> bool {

crates/objc2/src/rc/id_traits.rs

@@ -151,7 +151,9 @@ mod tests {
         }
     }
 
-    struct Iter<'a>(&'a Collection);
+    struct Iter<'a> {
+        _inner: &'a Collection,
+    }
 
     impl<'a> Iterator for Iter<'a> {
         type Item = &'a NSObject;
@@ -165,11 +167,13 @@ mod tests {
         type IntoIter = Iter<'a>;
 
         fn into_iter(self) -> Self::IntoIter {
-            Iter(self)
+            Iter { _inner: self }
         }
     }
 
-    struct IterMut<'a>(&'a mut Collection);
+    struct IterMut<'a> {
+        _inner: &'a mut Collection,
+    }
 
     impl<'a> Iterator for IterMut<'a> {
         type Item = &'a mut NSObject;
@@ -184,11 +188,13 @@ mod tests {
         type IntoIter = IterMut<'a>;
 
         fn into_iter(self) -> Self::IntoIter {
-            IterMut(self)
+            IterMut { _inner: self }
         }
     }
 
-    struct IntoIter(Id<Collection>);
+    struct IntoIter {
+        _inner: Id<Collection>,
+    }
 
     impl Iterator for IntoIter {
         type Item = Id<NSObject>;
@@ -202,7 +208,7 @@ mod tests {
         type IntoIter = IntoIter;
 
         fn id_into_iter(this: Id<Self>) -> Self::IntoIter {
-            IntoIter(this)
+            IntoIter { _inner: this }
         }
     }
 

crates/objc2/src/runtime/declare.rs

@@ -919,7 +919,9 @@ mod tests {
     )]
     fn test_ivar_sizing() {
         #[repr(align(16))]
-        struct U128align16([u64; 2]);
+        struct U128align16 {
+            _inner: [u64; 2],
+        }
 
         unsafe impl Encode for U128align16 {
             const ENCODING: Encoding = <[u64; 2]>::ENCODING;

crates/objc2/tests/macros_mainthreadmarker.rs

@@ -51,7 +51,9 @@ unsafe impl NSObjectProtocol for Cls {}
 // `icrate::Foundation::MainThreadMarker` to ensure soundness, they will not
 // do this!
 #[derive(Clone, Copy)]
-struct MainThreadMarker(bool);
+struct MainThreadMarker {
+    _some_field: u32,
+}
 
 extern_methods!(
     unsafe impl Cls {
@@ -68,7 +70,7 @@ extern_methods!(
 
 #[test]
 fn call() {
-    let mtm = MainThreadMarker(true);
+    let mtm = MainThreadMarker { _some_field: 0 };
     let obj1 = Cls::new(mtm);
 
     let res = Cls::method(mtm, 2, mtm);