Also test in release mode in CI

Author: madsmtm

.github/workflows/ci.yml

@@ -233,6 +233,12 @@ jobs:
         # Allows installing for a different base target
         target: ${{ matrix.rust.target || matrix.target }}
 
+    - name: Build
+      uses: actions-rs/cargo@v1
+      with:
+        command: build
+        args: ${{ matrix.args }}
+
     - name: Check documentation
       uses: actions-rs/cargo@v1
       with:
@@ -251,6 +257,12 @@ jobs:
         command: test
         args: --no-fail-fast --features ${{ env.FEATURES }} ${{ matrix.args }} ${{ matrix.test-args }}
 
+    - name: Test in release mode
+      uses: actions-rs/cargo@v1
+      with:
+        command: test
+        args: --no-fail-fast --features ${{ env.FEATURES }} ${{ matrix.args }} ${{ matrix.test-args }} --release
+
     - name: Test with unstable features
       if: matrix.rust.toolchain == 'nightly'
       uses: actions-rs/cargo@v1

objc2/src/lib.rs

@@ -180,7 +180,7 @@ pub mod __gnustep_hack {
     }
 
     pub unsafe fn get_class_to_force_linkage() -> &'static Class {
-        unsafe { &_OBJC_CLASS_NSObject }
+        unsafe { core::ptr::read_volatile(&&_OBJC_CLASS_NSObject) }
     }
 
     #[test]

objc2/src/rc/autorelease.rs

@@ -276,8 +276,8 @@ impl !AutoreleaseSafe for AutoreleasePool {}
 /// });
 /// ```
 ///
-/// Incorrect usage which panics because we tried to pass an outer pool to an
-/// inner pool:
+/// Incorrect usage which panics (with debug assertions enabled) because we
+/// tried to pass an outer pool to an inner pool:
 ///
 #[cfg_attr(feature = "unstable_autoreleasesafe", doc = "```compile_fail")]
 #[cfg_attr(not(feature = "unstable_autoreleasesafe"), doc = "```should_panic")]
@@ -300,6 +300,8 @@ impl !AutoreleaseSafe for AutoreleasePool {}
 ///     // assigned to the outer pool, even though it was released by the
 ///     // inner pool already.
 /// });
+/// #
+/// # panic!("Does not panic in release mode, so for testing we make it!");
 /// ```
 #[doc(alias = "@autoreleasepool")]
 pub fn autoreleasepool<T, F>(f: F) -> T