From 5a899c2244598c8b177e05dde38e54e180a50e42 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Wed, 29 Nov 2023 06:00:58 -0500
Subject: [PATCH] track reassignments separately from mutations

---
 packages/svelte/src/compiler/phases/scope.js  | 5 ++++-
 packages/svelte/src/compiler/types/index.d.ts | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/svelte/src/compiler/phases/scope.js b/packages/svelte/src/compiler/phases/scope.js
index 4f836f8f7a..4e5e17fc1d 100644
--- a/packages/svelte/src/compiler/phases/scope.js
+++ b/packages/svelte/src/compiler/phases/scope.js
@@ -638,7 +638,10 @@ export function create_scopes(ast, root, allow_reactive_declarations, parent) {
 		} else {
 			extract_identifiers(node).forEach((identifier) => {
 				const binding = scope.get(identifier.name);
-				if (binding) binding.mutated = true;
+				if (binding) {
+					binding.mutated = true;
+					binding.reassigned = true;
+				}
 			});
 		}
 	}
diff --git a/packages/svelte/src/compiler/types/index.d.ts b/packages/svelte/src/compiler/types/index.d.ts
index 2c5480eb7f..4bca4d1d4a 100644
--- a/packages/svelte/src/compiler/types/index.d.ts
+++ b/packages/svelte/src/compiler/types/index.d.ts
@@ -269,6 +269,7 @@ export interface Binding {
 	is_called: boolean;
 	references: { node: Identifier; path: SvelteNode[] }[];
 	mutated: boolean;
+	reassigned: boolean;
 	scope: Scope;
 	/** For `legacy_reactive`: its reactive dependencies */
 	legacy_dependencies: Binding[];