fix: output template effect for svg xlink attribute

.changeset/serious-spiders-bake.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: output template effect for svg xlink attribute

packages/svelte/src/compiler/phases/2-analyze/visitors/Attribute.js

@@ -52,6 +52,10 @@ export function Attribute(node, context) {
 			node.metadata.expression.has_state ||= chunk.metadata.expression.has_state;
 			node.metadata.expression.has_call ||= chunk.metadata.expression.has_call;
 			node.metadata.expression.can_inline &&= chunk.metadata.expression.can_inline;
+
+			if (!node.metadata.expression.can_inline) {
+				mark_subtree_dynamic(context.path);
+			}
 		}
 
 		if (is_event_attribute(node)) {

packages/svelte/tests/runtime-legacy/samples/inline-expressions-3/_config.js

@@ -0,0 +1,5 @@
+import { test } from '../../test';
+
+export default test({
+	html: `<div><svg aria-hidden="true" height="14" width="13"><use xlink:href="test#done"></use></svg></div`
+});

packages/svelte/tests/runtime-legacy/samples/inline-expressions-3/main.svelte

@@ -0,0 +1,9 @@
+<script>
+	import { sprites } from './sprites.js'
+</script>
+
+<div>
+	<svg width="13" height="14" aria-hidden="true">
+    <use xlink:href="{sprites['a']}#done"></use>
+  </svg>
+</div>

packages/svelte/tests/runtime-legacy/samples/inline-expressions-3/sprites.js

@@ -0,0 +1,3 @@
+export const sprites = {
+	a: 'test'
+};