message: Mark ValueCaptured as not serializable
diff: @@ -28,12 +28,12 @@ use gazebo::{any::AnyLifetime, prelude::*};
  use crate as starlark;
  use crate::values::{Freeze, Freezer, FrozenValue, StarlarkValue, Value, ValueLike};
  -#[derive(Debug, Trace, AnyLifetime, Display)]
  +#[derive(Debug, Trace, AnyLifetime, Display, NoSerialize)]
  #[display(fmt = "{:?}", self)] // This type should never be user visible
  #[repr(transparent)]
  pub(crate) struct ValueCaptured<'v>(pub Cell<Option<Value<'v>>>);
  -#[derive(Debug, AnyLifetime, Display)]
  +#[derive(Debug, AnyLifetime, Display, NoSerialize)]
  #[display(fmt = "{:?}", self)] // Type is not user visible
  #[repr(transparent)]
  pub(crate) struct FrozenValueCaptured(Option<FrozenValue>);
  