/// Constant containing interior mutability (`UnsafeCell<T>`).
/// This must be ruled out to make sure that evaluating the constant at compile-time
-/// and run-time would produce the same result. In particular, promotion of temporaries
-/// must not change program behavior; if the promoted could be written to, that would
-/// be a problem.
+/// and at *any point* during the run-time would produce the same result. In particular,
+/// promotion of temporaries must not change program behavior; if the promoted could be
+/// written to, that would be a problem.
struct HasMutInterior;
impl Qualif for HasMutInterior {