fix logic

src/compiler/compile/render_dom/wrappers/Element/index.ts

@@ -862,11 +862,13 @@ export default class ElementWrapper extends Wrapper {
 			b`${fn}(${this.var}, ${data});`
 		);
 
+		if (this.has_dynamic_attribute) {
 			block.chunks.update.push(b`
 				${fn}(${this.var}, ${data} = @get_spread_update(${levels}, [
 					${updates}
 				]));
 			`);
+		}
 
 		// handle edge cases for elements
 		if (this.node.name === 'select') {
@@ -1133,7 +1135,7 @@ export default class ElementWrapper extends Wrapper {
 
 			block.chunks.hydrate.push(updater);
 
-			if ((this.node.is_dynamic_element && this.has_dynamic_attribute) || has_spread) {
+			if ((this.node.is_dynamic_element || has_spread) && this.has_dynamic_attribute) {
 				block.chunks.update.push(updater);
 			} else if ((dependencies && dependencies.size > 0) || this.class_dependencies.length) {
 				const all_dependencies = this.class_dependencies.concat(...dependencies);

test/runtime/samples/class-with-spread-and-bind/main.svelte

@@ -1,5 +1,5 @@
 <script>	
-	let primary = true;	
+	export let primary = true;
 	let elem;
 </script>