on second thoughts

packages/svelte/src/compiler/phases/3-transform/client/transform-client.js

@@ -65,7 +65,7 @@ export function client_component(source, analysis, options) {
 		preserve_whitespace: options.preserveWhitespace,
 		public_state: new Map(),
 		private_state: new Map(),
-		getters: new Map(),
+		getters: {},
 		in_constructor: false,
 
 		// these are set inside the `Fragment` visitor, and cannot be used until then
@@ -583,7 +583,7 @@ export function client_module(analysis, options) {
 		legacy_reactive_statements: new Map(),
 		public_state: new Map(),
 		private_state: new Map(),
-		getters: new Map(),
+		getters: {},
 		in_constructor: false
 	};
 

packages/svelte/src/compiler/phases/3-transform/client/utils.js

@@ -84,7 +84,7 @@ export function serialize_get_binding(node, state) {
 		return b.call(node);
 	}
 
-	const getter = state.getters.get(binding);
+	const getter = state.getters[node.name];
 	if (getter) {
 		return typeof getter === 'function' ? getter(node) : getter;
 	}

packages/svelte/src/compiler/phases/3-transform/server/transform-server.js

@@ -221,7 +221,7 @@ function serialize_get_binding(node, state) {
 		);
 	}
 
-	const getter = state.getters.get(binding);
+	const getter = state.getters[binding.node.name];
 	if (getter) {
 		return typeof getter === 'function' ? getter(node) : getter;
 	}
@@ -1988,7 +1988,7 @@ export function server_component(analysis, options) {
 		namespace: options.namespace,
 		preserve_whitespace: options.preserveWhitespace,
 		private_derived: new Map(),
-		getters: new Map(),
+		getters: {},
 		skip_hydration_boundaries: false
 	};
 
@@ -2300,7 +2300,7 @@ export function server_module(analysis, options) {
 		// transform state as well as component transform state
 		legacy_reactive_statements: new Map(),
 		private_derived: new Map(),
-		getters: new Map()
+		getters: {}
 	};
 
 	const module = /** @type {import('estree').Program} */ (

packages/svelte/src/compiler/phases/3-transform/types.d.ts

@@ -8,5 +8,5 @@ export interface TransformState {
 	readonly options: ValidatedModuleCompileOptions;
 	readonly scope: Scope;
 	readonly scopes: Map<SvelteNode, Scope>;
-	readonly getters: Map<Binding, Expression | ((id: Identifier) => Expression)>;
+	readonly getters: Record<string, Expression | ((id: Identifier) => Expression)>;
 }