feat: comment

src/vm/mod.rs

@@ -52,10 +52,16 @@ impl<'vm> VM<'vm> {
     }
 
     pub fn get_thunk(&self, idx: usize) -> &'vm Thunk<'vm> {
+        // SAFETY: The `idx` is within bounds as `thunks` is initialized with `prog.thunks`
+        // and `idx` is expected to be a valid index into this collection.
+        // The lifetime of the returned reference is tied to `&self`.
         unsafe { &*(&self.thunks[idx] as *const _) }
     }
 
     pub fn get_func(&self, idx: usize) -> &'vm Func<'vm> {
+        // SAFETY: The `idx` is within bounds as `funcs` is initialized with `prog.funcs`
+        // and `idx` is expected to be a valid index into this collection.
+        // The lifetime of the returned reference is tied to `&self`.
         unsafe { &*(&self.funcs[idx] as *const _) }
     }