f note limitation

Author: TheBlueMatt

lightning/src/debug_sync.rs

@@ -213,7 +213,12 @@ impl<T: Sized> Deref for RwLockReadGuard<'_, T> {
 
 impl<T: Sized> Drop for RwLockReadGuard<'_, T> {
 	fn drop(&mut self) {
-		if !self.first_lock { return; }
+		if !self.first_lock {
+			// Note that its not strictly true that the first taken read lock will get unlocked
+			// last, but in practice our locks are always taken as RAII, so it should basically
+			// always be true.
+			return;
+		}
 		MUTEXES_HELD.with(|held| {
 			held.borrow_mut().remove(&self.mutex.deps);
 		});