From 4907f3854db49c4fae0cad9bc8d8ae192c1298d5 Mon Sep 17 00:00:00 2001
From: Fred Kleuver <fred@avurad.nl>
Date: Tue, 30 Oct 2018 03:42:52 +0100
Subject: [PATCH] fix(parser): throw on unterminated quote instead of infinite
 loop

---
 src/parser.js       |  2 +-
 test/parser.spec.js | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/parser.js b/src/parser.js
index 4149222a..256c1495 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -472,7 +472,7 @@ export class ParserImplementation {
 
         buffer.push(fromCharCode(unescaped));
         marker = this.idx;
-      } else if (this.ch === /*EOF*/0) {
+      } else if (this.ch === /*EOF*/0 || this.idx >= this.len) {
         this.err('Unterminated quote');
       } else {
         this.next();
diff --git a/test/parser.spec.js b/test/parser.spec.js
index 5cf6ad4a..a6fc5421 100644
--- a/test/parser.spec.js
+++ b/test/parser.spec.js
@@ -661,6 +661,23 @@ describe('Parser', () => {
   });
 
   describe('should not parse', () => {
+    describe('LiteralString with unterminated quote', () => {
+      const expressions = [
+        '\'a',
+        '\'',
+        'a\'',
+        '"a',
+        '"',
+        'a"'
+      ];
+
+      for (const expr of expressions) {
+        it(expr, () => {
+          _verifyError(expr, 'Unterminated quote');
+        });
+      }
+    });
+
     describe('LiteralObject with computed property', () => {
       const expressions = [
         '{ []: "foo" }',