more aliased stuff

src/compiler/compile/Component.ts

@@ -796,6 +796,11 @@ export default class Component {
 					scope = map.get(node);
 				}
 
+				if (node.type === 'VariableDeclarator' && node.id.type === 'Identifier' && node.init.type === 'Identifier') {
+					const variable = component.var_lookup.get(node.init.name);
+					variable.aliased = true;
+				}
+
 				if (node.type === 'ExpressionStatement' && node.expression.type === 'CallExpression') {
 					node.expression.arguments.forEach(arg => {
 						if (arg.type === 'Identifier') {

test/js/samples/aliased-function/expected.js

@@ -0,0 +1,21 @@
+/* generated by Svelte vX.Y.Z */
+import { SvelteComponent, init, safe_not_equal } from "svelte/internal";
+
+function instance($$self) {
+	function foo() {
+		
+	}
+
+	const foo_alias = foo;
+	foo_alias.nasty_but_legal();
+	return [];
+}
+
+class Component extends SvelteComponent {
+	constructor(options) {
+		super();
+		init(this, options, instance, null, safe_not_equal, {});
+	}
+}
+
+export default Component;

test/js/samples/aliased-function/input.svelte

@@ -0,0 +1,5 @@
+<script>
+	function foo() {}
+	const foo_alias = foo;
+	foo_alias.nasty_but_legal();
+</script>