Closes #9, Closes #10

Author: infctr

Diff for: lib/utils/ast.js

@@ -103,6 +103,10 @@ module.exports = {
    * @private
    */
   getPropertyName(node) {
-    return module.exports.getStaticPropertyName(node) || node.key.name || null;
+    return (
+      module.exports.getStaticPropertyName(node) ||
+      (node.key && node.key.name) ||
+      null
+    );
   },
 };

Diff for: tests/fixtures/autofix.input.ts

@@ -99,3 +99,12 @@ type Type2 = {/* %foo */
    */
   bar: boolean;
 }
+
+interface ClockConstructor {
+  new (hour: number, minute: number): ClockInterface;
+  new (hour: number): ClockInterface;
+}
+
+interface ClockInterface {
+  tick(): void;
+}

Diff for: tests/fixtures/autofix.output.ts

@@ -101,3 +101,12 @@ type Type2 = {
   /* %foo */
   foo: boolean;
 }
+
+interface ClockConstructor {
+  new (hour: number, minute: number): ClockInterface;
+  new (hour: number): ClockInterface;
+}
+
+interface ClockInterface {
+  tick(): void;
+}