Ensure that the original state is restored on lookahead - fixes #2086

2015-07-26 20:48:40 -07:00
parent 507303456f
commit 0bfc5a90dc
4 changed files with 195 additions and 1 deletions
--- a/packages/babylon/src/tokenizer/index.js
+++ b/packages/babylon/src/tokenizer/index.js
@@ -91,7 +91,8 @@ export default class Tokenizer {
  // TODO

  lookahead() {
-    var old = this.state.clone();
+    var old = this.state;
+    this.state = old.clone();
    this.next();
    var curr = this.state.clone();
    this.state = old;