fix: no longer crash when used with transform-es2015-classes

package.json

@@ -44,6 +44,7 @@
     "babel-plugin-syntax-jsx": "^6.13.0",
     "babel-plugin-transform-async-to-generator": "^6.8.0",
     "babel-plugin-transform-class-properties": "^6.11.5",
+    "babel-plugin-transform-es2015-classes": "^6.14.0",
     "babel-plugin-transform-flow-strip-types": "^6.14.0",
     "babel-preset-es2015-node4": "^2.1.0",
     "babel-preset-react": "^6.11.1",

src/index.js

@@ -84,6 +84,7 @@ export default function ({types: t, template}: {types: BabelTypes, template: Bab
         }
         if (path.node.id) {
           const binding = path.scope.getBinding(path.node.id.name);
+          if (!binding) return;
           const isUnsafeUse = usePath => {
             if (usePath.parent.type !== 'MemberExpression') return false;
             if (usePath.key !== 'object') return false;

test/fixtures/regression-classes-unbound-name/actual.js

@@ -0,0 +1,3 @@
+class Clazz {
+  unbound () {}
+}

test/fixtures/regression-classes-unbound-name/expected.js

@@ -0,0 +1,26 @@
+var _createClass = function () { var defineProperties = _defineProperties; return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
+
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+var _defineProperties = function defineProperties(target, props) {
+  for (var i = 0; i < props.length; i++) {
+    var descriptor = props[i];
+    descriptor.enumerable = descriptor.enumerable || false;
+    descriptor.configurable = true;
+    if ("value" in descriptor) descriptor.writable = true;
+    Object.defineProperty(target, descriptor.key, descriptor);
+  }
+};
+
+let Clazz = function () {
+  function Clazz() {
+    _classCallCheck(this, Clazz);
+  }
+
+  _createClass(Clazz, [{
+    key: "unbound",
+    value: function unbound() {}
+  }]);
+
+  return Clazz;
+}();

test/fixtures/regression-classes-unbound-name/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["transform-es2015-classes"]
+}