From f9fc2f37dc0ff67d1d37ba81a87cc1ac2083cf20 Mon Sep 17 00:00:00 2001
From: Rich-Harris <richard.a.harris@gmail.com>
Date: Sun, 2 Apr 2017 13:46:06 -0400
Subject: [PATCH] prevent unclosed <script> causing infinite loop

---
 src/parse/read/script.js                             | 2 ++
 test/parser/samples/error-script-unclosed/error.json | 8 ++++++++
 test/parser/samples/error-script-unclosed/input.html | 3 +++
 3 files changed, 13 insertions(+)
 create mode 100644 test/parser/samples/error-script-unclosed/error.json
 create mode 100644 test/parser/samples/error-script-unclosed/input.html

diff --git a/src/parse/read/script.js b/src/parse/read/script.js
index 641a389804..2d1156ad7d 100644
--- a/src/parse/read/script.js
+++ b/src/parse/read/script.js
@@ -7,6 +7,8 @@ export default function readScript ( parser, start, attributes ) {
 	const scriptStart = parser.index;
 	const scriptEnd = parser.template.indexOf( scriptClosingTag, scriptStart );
 
+	if ( scriptEnd === -1 ) parser.error( `<script> must have a closing tag` );
+
 	const source = spaces( scriptStart ) + parser.template.slice( scriptStart, scriptEnd );
 	parser.index = scriptEnd + scriptClosingTag.length;
 
diff --git a/test/parser/samples/error-script-unclosed/error.json b/test/parser/samples/error-script-unclosed/error.json
new file mode 100644
index 0000000000..fc928cabab
--- /dev/null
+++ b/test/parser/samples/error-script-unclosed/error.json
@@ -0,0 +1,8 @@
+{
+	"message": "<script> must have a closing tag",
+	"loc": {
+		"line": 3,
+		"column": 8
+	},
+	"pos": 34
+}
\ No newline at end of file
diff --git a/test/parser/samples/error-script-unclosed/input.html b/test/parser/samples/error-script-unclosed/input.html
new file mode 100644
index 0000000000..a3e9f0d0b9
--- /dev/null
+++ b/test/parser/samples/error-script-unclosed/input.html
@@ -0,0 +1,3 @@
+<h1>Hello {{name}}!</h1>
+
+<script>
\ No newline at end of file