diff --git a/unsafe-rust-is-cpp/src/main.rs b/unsafe-rust-is-cpp/src/main.rs
index f4e2b2dc65cd2399a88305f4f0164d6b27941aa5..573fbbc94c26a678715ca5bb01980d638017bf69 100644
--- a/unsafe-rust-is-cpp/src/main.rs
+++ b/unsafe-rust-is-cpp/src/main.rs
@@ -36,6 +36,10 @@ pub fn rust_like_its_2025() {
     // So far this is the same. Let's move the rest to a function.
     println!("OUTPUT: {}", foo(n_mut1, n_mut2));
 
+    // This works if you compile on debug.
+    // It also works if `foo` is hinted as never inlined.
+    // But it won't work anymore if non-inlined and compiled in release!
+    
     // You can't code in unsafe Rust like it's C++.
     // Unsafe Rust does not allow you to jump over the borrow rules.
     // It merely stops preventing you from trying.