fix crash when __esModule is called with defineProperty without value

lib/dependencies/CommonJsExportsParserPlugin.js

@@ -100,7 +100,7 @@ class CommonJsExportsParserPlugin {
 		const checkNamespace = (topLevel, members, valueExpr) => {
 			if (!DynamicExports.isEnabled(parser.state)) return;
 			if (members.length > 0 && members[0] === "__esModule") {
-				if (isTruthyLiteral(valueExpr) && topLevel) {
+				if (valueExpr && isTruthyLiteral(valueExpr) && topLevel) {
 					DynamicExports.setFlagged(parser.state);
 				} else {
 					DynamicExports.setDynamic(parser.state);

test/cases/cjs-tree-shaking/esModule-getter/index.js

@@ -0,0 +1,15 @@
+import def, { named, __esModule } from "./module";
+import * as ns from "./module";
+
+it("should allow to import module with getters", () => {
+	expect(def).toBe("default");
+	expect(named).toBe("named");
+	expect(__esModule).toBe(true);
+	expect(ns.default).toBe("default");
+	expect(ns.named).toBe("named");
+	expect(ns.__esModule).toBe(true);
+	const indirect = Object(ns);
+	expect(indirect.default).toBe("default");
+	expect(indirect.named).toBe("named");
+	expect(indirect.__esModule).toBe(true);
+});

test/cases/cjs-tree-shaking/esModule-getter/module.js

@@ -0,0 +1,3 @@
+Object.defineProperty(exports, "__esModule", { get: () => true });
+Object.defineProperty(exports, "default", { get: () => "default" });
+Object.defineProperty(exports, "named", { get: () => "named" });