fix test

package.json

@@ -6,9 +6,6 @@
   "type": "module",
   "license": "MIT",
   "packageManager": "pnpm@9.2.0",
-  "engines": {
-    "pnpm": "^9.0.0"
-  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/sveltejs/svelte.git"

packages/svelte/src/internal/client/runtime.js

@@ -454,13 +454,16 @@ function remove_reaction(signal, dependency) {
 			}
 		}
 	}
+	var flags = dependency.f;
 	// If the derived has no reactions, then we can disconnect it from the graph,
 	// allowing it to either reconnect in the future, or be GC'd by the VM.
-	if (reactions_length === 0 && (dependency.f & DERIVED) !== 0) {
-		set_signal_status(dependency, MAYBE_DIRTY);
+	if (reactions_length === 0 && (flags & DERIVED) !== 0) {
+		if ((flags & CLEAN) !== 0) {
+			set_signal_status(dependency, MAYBE_DIRTY);
+		}
 		// If we are working with a derived that is owned by an effect, then mark it as being
 		// disconnected.
-		if ((dependency.f & (UNOWNED | DISCONNECTED)) === 0) {
+		if ((flags & (UNOWNED | DISCONNECTED)) === 0) {
 			dependency.f ^= DISCONNECTED;
 		}
 		remove_reactions(/** @type {import('#client').Derived} **/ (dependency), 0);

packages/svelte/tests/signals/test.ts

@@ -451,6 +451,7 @@ describe('signals', () => {
 	test('disconnected and reconnected deriveds work as intended', () => {
 		let a: Derived<unknown>;
 		let state = source(0);
+		let state_b = source(0);
 		let log: any[] = [];
 		let b = derived(() => {
 			log.push('b');
@@ -458,6 +459,7 @@ describe('signals', () => {
 		});
 		let c = derived(() => {
 			log.push('c');
+			$.get(state_b);
 			return $.get(b);
 		});
 		let destroy: () => void;
@@ -480,8 +482,14 @@ describe('signals', () => {
 			assert.deepEqual(log, ['a', 'c', 'b']);
 			log.length = 0;
 			destroy();
+			destroy = effect_root(() => {
+				render_effect(() => {
+					$.get(c);
+					set(state_b, 1);
+				});
+			});
+			destroy();
 			set(state, 1);
-			$.set_signal_status(c, DIRTY);
 			assert.equal($.get(c), 1);
 			assert.deepEqual(log, ['c', 'b']);
 			log.length = 0;