From 89d2e8a07733d94e8c1d7c13c20a38311c51ccd6 Mon Sep 17 00:00:00 2001
From: Boopathi Rajaa <me@boopathi.in>
Date: Mon, 14 Aug 2017 00:42:59 +0200
Subject: [PATCH] Fix helper toMultipleSeqExpr with es2015

+ Fix #632
---
 .../src/index.js                                 |  2 +-
 .../__tests__/babili-es2015-tests.js             | 16 ++++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/packages/babel-helper-to-multiple-sequence-expressions/src/index.js b/packages/babel-helper-to-multiple-sequence-expressions/src/index.js
index c9281c288..8f43dc84d 100644
--- a/packages/babel-helper-to-multiple-sequence-expressions/src/index.js
+++ b/packages/babel-helper-to-multiple-sequence-expressions/src/index.js
@@ -47,7 +47,7 @@ module.exports = function(t) {
         if (t.isExpression(node)) {
           exprs.push(node);
         } else if (t.isExpressionStatement(node)) {
-          exprs.push(node.expression);
+          if (node.expression) exprs.push(node.expression);
         } else if (t.isIfStatement(node)) {
           let consequent;
           if (node.consequent) {
diff --git a/packages/babel-preset-minify/__tests__/babili-es2015-tests.js b/packages/babel-preset-minify/__tests__/babili-es2015-tests.js
index 876aff558..8d21da040 100644
--- a/packages/babel-preset-minify/__tests__/babili-es2015-tests.js
+++ b/packages/babel-preset-minify/__tests__/babili-es2015-tests.js
@@ -26,4 +26,20 @@ describe("preset along with es2015", () => {
     cat = _obj.cat, _obj;
   `
   );
+
+  thePlugin(
+    "should fix simplify with es2015 - issue#632",
+    `
+      let obj, key;
+      if (1) ({k: key} = obj);
+      foo();
+    `,
+    `
+      "use strict";
+
+      var obj,
+          key = void 0;
+      key = obj.k, foo();
+    `
+  );
 });