also test in release

ci/script.sh

@@ -7,7 +7,9 @@ main() {
             ;;
         x86_64-unknown-linux-gnu)
             cargo check --target $TARGET
+
             cargo test --target $TARGET
+            cargo test --target $TARGET --release
 
             export TSAN_OPTIONS="suppressions=$(pwd)/blacklist.txt"
             export RUSTFLAGS="-Z sanitizer=thread"

src/ring_buffer/mod.rs

@@ -28,6 +28,7 @@ where
     // this is where we enqueue new items
     #[cfg(target_has_atomic = "ptr")] tail: AtomicUsize,
     #[cfg(not(target_has_atomic = "ptr"))] tail: usize,
+
     buffer: UntaggedOption<A>,
 }
 

src/ring_buffer/spsc.rs

@@ -144,8 +144,7 @@ where
         // NOTE(volatile) the value of `head` can change at any time in the execution context of the
         // producer so we inform this to the compiler using a volatile load
         if next_tail != unsafe { ptr::read_volatile(&rb.head) } {
-            // NOTE(ptr::write) the memory slot that we are about to write to is uninitialized. We
-            // use `ptr::write` to avoid running `T`'s destructor on the uninitialized memory
+            // NOTE(ptr::write) see the other `enqueue` implementation above for details
             unsafe { ptr::write(buffer.get_unchecked_mut(rb.tail), item) }
             rb.tail = next_tail;
             Ok(())