Resolve an infinite loop case

Author: raxbg

src/Value/Value.php

@@ -72,6 +72,9 @@ public static function parseValue(ParserState $oParserState, array $aListDelimit
             }
             $iStartPosition = null;
             while (($iStartPosition = array_search($sDelimiter, $aStack, true)) !== false) {
+                if ($iStartPosition === 0) {
+                    break;
+                }
                 $iLength = 2; //Number of elements to be joined
                 for ($i = $iStartPosition + 2; $i < count($aStack); $i += 2, ++$iLength) {
                     if ($sDelimiter !== $aStack[$i]) {

tests/ParserTest.php

@@ -1238,6 +1238,16 @@ public function functionArithmeticInFile()
         self::assertSame($sExpected, $oDoc->render());
     }
 
+    /**
+     * @test
+     */
+    public function infiniteLoopInFile()
+    {
+        $oDoc = self::parsedStructureForFile('infinite-loop', Settings::create()->withMultibyteSupport(true));
+        $sExpected = 'div {}';
+        self::assertSame($sExpected, $oDoc->render());
+    }
+
     public function escapedSpecialCaseTokens()
     {
         $oDoc = $this->parsedStructureForFile('escaped-tokens');

tests/fixtures/infinite-loop.css

@@ -0,0 +1,3 @@
+div {
+    height: ///!;
+}