From fc977a2abecb2eef8fd87537ea8dc0ea28b51426 Mon Sep 17 00:00:00 2001
From: Rich-Harris <richard.a.harris@gmail.com>
Date: Sat, 24 Dec 2016 13:18:57 -0500
Subject: [PATCH] provide useful feedback on encountering void element closing
 tag

---
 src/parse/state/tag.js                    | 4 ++++
 test/parser/error-void-closing/error.json | 8 ++++++++
 test/parser/error-void-closing/input.html | 1 +
 3 files changed, 13 insertions(+)
 create mode 100644 test/parser/error-void-closing/error.json
 create mode 100644 test/parser/error-void-closing/input.html

diff --git a/src/parse/state/tag.js b/src/parse/state/tag.js
index c3fa1a122258..2db102ab0d7d 100644
--- a/src/parse/state/tag.js
+++ b/src/parse/state/tag.js
@@ -47,6 +47,10 @@ export default function tag ( parser ) {
 	parser.allowWhitespace();
 
 	if ( isClosingTag ) {
+		if ( voidElementNames.test( name ) ) {
+			parser.error( `<${name}> is a void element and cannot have children, or a closing tag`, start );
+		}
+
 		if ( !parser.eat( '>' ) ) parser.error( `Expected '>'` );
 
 		const element = parser.current();
diff --git a/test/parser/error-void-closing/error.json b/test/parser/error-void-closing/error.json
new file mode 100644
index 000000000000..8756a518782f
--- /dev/null
+++ b/test/parser/error-void-closing/error.json
@@ -0,0 +1,8 @@
+{
+	"message": "<input> is a void element and cannot have children, or a closing tag",
+	"loc": {
+		"line": 1,
+		"column": 23
+	},
+	"pos": 23
+}
diff --git a/test/parser/error-void-closing/input.html b/test/parser/error-void-closing/input.html
new file mode 100644
index 000000000000..886b019891a3
--- /dev/null
+++ b/test/parser/error-void-closing/input.html
@@ -0,0 +1 @@
+<input>this is illegal!</input>