fix tests

src/internal/Component.js

@@ -101,7 +101,13 @@ export class $$Component {
 		// we schedule onMount callbacks before afterRender callbacks
 		after_render(() => {
 			const onDestroy = this.$$onMount.map(run).filter(is_function);
+			if (this.$$onDestroy) {
 				this.$$onDestroy.push(...onDestroy);
+			} else {
+				// Edge case — component was destroyed immediately,
+				// most likely as a result of a binding initialising
+				run_all(onDestroy);
+			}
 			this.$$onMount = [];
 		});
 

test/runtime/samples/component-binding-blowback-c/main.html

@@ -15,7 +15,7 @@
 <input type='number' bind:value={count}>
 
 <ol>
-	{#each ids as object (object.id)}
+	{#each ids() as object (object.id)}
 		<Nested bind:value={idToValue[object.id]} id={object.id}>
 			{object.id}: value is {idToValue[object.id]}
 		</Nested>