message: Mark FrozenModuleRef as not serializable
diff: @@ -33,6 +33,7 @@ use gazebo::{any::AnyLifetime, prelude::*};
  use itertools::Itertools;
  use crate::{
  + self as starlark,
  environment::{
  names::{FrozenNames, MutableNames},
  slots::{FrozenSlots, ModuleSlotId, MutableSlots},
  @@ -69,7 +70,7 @@ pub struct FrozenModule {
  pub(crate) eval_duration: Duration,
  }
  -#[derive(Debug, Clone, Dupe, AnyLifetime, Display)]
  +#[derive(Debug, Clone, Dupe, AnyLifetime, Display, NoSerialize)]
  #[display(fmt = "{:?}", self)] // Type should not be user visible
  pub(crate) struct FrozenModuleRef(pub(crate) Arc<FrozenModuleData>);
  