fix readUntil infinite loop bug

compiler/parse/index.js

@@ -94,8 +94,19 @@ export default function parse ( template ) {
 		},
 
 		readUntil ( pattern ) {
-			const match = pattern.exec( this.template.slice( this.index ) );
+			if ( this.index >= this.template.length ) parser.error( 'Unexpected end of input' );
-			return this.template.slice( this.index, match ? ( this.index += match.index ) : this.template.length );
+
+			const start = this.index;
+			const match = pattern.exec( this.template.slice( start ) );
+
+			if ( match ) {
+				const start = this.index;
+				this.index = start + match.index;
+				return this.template.slice( start, this.index );
+			}
+
+			this.index = this.template.length;
+			return this.template.slice( start );
 		},
 
 		remaining () {

test/parser/error-unexpected-end-of-input-b/error.json

@@ -0,0 +1,8 @@
+{
+	"message": "Unexpected end of input",
+	"loc": {
+		"line": 1,
+		"column": 2
+	},
+	"pos": 2
+}

test/parser/error-unexpected-end-of-input-b/input.html

@@ -0,0 +1 @@
+<d

test/parser/error-unexpected-end-of-input-c/error.json

@@ -0,0 +1,8 @@
+{
+	"message": "Unexpected end of input",
+	"loc": {
+		"line": 1,
+		"column": 1
+	},
+	"pos": 1
+}

test/parser/error-unexpected-end-of-input-c/input.html

@@ -0,0 +1 @@
+<

test/parser/error-unexpected-end-of-input/error.json

@@ -1,8 +1,8 @@
 {
 	"message": "Unexpected end of input",
 	"loc": {
-		"line": 2,
+		"line": 1,
-		"column": 0
+		"column": 5
 	},
-	"pos": 6
+	"pos": 5
 }

test/test.js

@@ -32,7 +32,7 @@ describe( 'svelte', () => {
 			const solo = exists( `test/parser/${dir}/solo` );
 
 			( solo ? it.only : it )( dir, () => {
-				const input = fs.readFileSync( `test/parser/${dir}/input.html`, 'utf-8' );
+				const input = fs.readFileSync( `test/parser/${dir}/input.html`, 'utf-8' ).replace( /\s+$/, '' );
 
 				try {
 					const actual = parse( input );