fix assignment to computed property

src/compile/render-dom/index.ts

@@ -5,9 +5,9 @@ import Component from '../Component';
 import Renderer from './Renderer';
 import { CompileOptions } from '../../interfaces';
 import { walk } from 'estree-walker';
-import flattenReference from '../../utils/flattenReference';
 import stringifyProps from '../../utils/stringifyProps';
 import addToSet from '../../utils/addToSet';
+import getObject from '../../utils/getObject';
 
 export default function dom(
 	component: Component,
@@ -160,7 +160,7 @@ export default function dom(
 				}
 
 				if (node.type === 'AssignmentExpression') {
-					const { name } = flattenReference(node.left);
+					const { name } = getObject(node.left);
 
 					if (scope.findOwner(name) === component.instance_scope) {
 						component.instrument(node, parent, name, false);

test/runtime/samples/assignment-to-computed-property/_config.js

@@ -0,0 +1,5 @@
+export default {
+	test({ assert, component }) {
+		assert.deepEqual(component.foo, { baz: 1 });
+	}
+};

test/runtime/samples/assignment-to-computed-property/main.html

@@ -0,0 +1,5 @@
+<script>
+	export let foo = {};
+	let bar = 'baz';
+	foo[bar] = 1;
+</script>