Fix stable iteration ordering for Map<Name, ...> usages

crates/intern/src/symbol.rs

@@ -37,6 +37,7 @@ const _: () =
 /// A pointer that points to a pointer to a `str`, it may be backed as a `&'static &'static str` or
 /// `Arc<Box<str>>` but its size is that of a thin pointer. The active variant is encoded as a tag
 /// in the LSB of the alignment niche.
+// Note, Ideally this would encode a `ThinArc<str>` and `ThinRef<str>`/`ThinConstPtr<str>` instead of the double indirection.
 #[derive(PartialEq, Eq, Hash, Copy, Clone, Debug)]
 struct TaggedArcPtr {
     packed: NonNull<*const str>,

crates/intern/src/symbol/symbols.rs

@@ -13,6 +13,10 @@ use crate::{
 
 macro_rules! define_symbols {
     (@WITH_NAME: $($alias:ident = $value:literal),* $(,)? @PLAIN: $($name:ident),* $(,)?) => {
+        // Ideally we would be emitting `const` here, but then we no longer have stable addresses
+        // which is what we are relying on for equality! In the future if consts can refer to
+        // statics we should swap these for `const`s and have the the string literal being pointed
+        // to be statics to refer to such that their address is stable.
         $(
             pub static $name: Symbol = Symbol { repr: TaggedArcPtr::non_arc(&stringify!($name)) };
         )*