[fix] destructuring store assignment

src/runtime/internal/utils.ts

@@ -159,7 +159,8 @@ export function null_to_empty(value) {
 return value == null ? '' : value;
 }
 
-export function set_store_value(store, ret, value = ret) {
+export function set_store_value(store, ret, value) {
+if (arguments.length === 2) value = ret;
 store.set(value);
 return ret;
 }

test/runtime/samples/store-assignment-updates-destructure/_config.js

@@ -0,0 +1,11 @@
+export default {
+html: `
+<div>$userName1: user1</div>
+<div>$userName2: undefined</div>
+<div>$userName3: undefined</div>
+<div>$userName4: user4</div>
+<div>$userName5: undefined</div>
+<div>$userName6: user6</div>
+<div>$userName7: undefined</div>
+`
+};

test/runtime/samples/store-assignment-updates-destructure/main.svelte

@@ -0,0 +1,34 @@
+<script>
+import { writable } from 'svelte/store';
+
+let userName1 = writable('init1')
+let userName2 = writable('init2')
+let userName3 = writable('init3')
+let userName4 = writable('init4')
+let userName5 = writable('init5')
+let userName6 = writable('init6')
+let userName7 = writable('init7')
+
+let obj = {
+userName1: 'user1', 
+userName2: 'user2', 
+userName3: 'user3', 
+$userName4: 'user4',
+userName5: 'user5',
+$userName6: 'user6',
+userName7: 'user7',
+}
+
+;({userName1: $userName1, $userName2 } = obj)
+;({$userName3} = obj)
+;({$userName4} = obj)
+;({$userName5, $userName6, $userName7} = obj)
+</script>
+
+<div>$userName1: {$userName1}</div>
+<div>$userName2: {$userName2}</div>
+<div>$userName3: {$userName3}</div>
+<div>$userName4: {$userName4}</div>
+<div>$userName5: {$userName5}</div>
+<div>$userName6: {$userName6}</div>
+<div>$userName7: {$userName7}</div>