Ref #291 - Fix #156 - Parser mistakes with comments

Signed-off-by: William Desportes <[email protected]>

Author: williamdes

src/Components/ExpressionArray.php

@@ -108,10 +108,13 @@ public static function parse(Parser $parser, TokensList $list, array $options =
         --$list->idx;
 
         if (is_array($ret)) {
-            $expr = $ret[count($ret) - 1]->expr;
-            if (preg_match('/\s*--\s.*$/', $expr, $matches)) {
-                $found = $matches[0];
-                $ret[count($ret) - 1]->expr = substr($expr, 0, strlen($expr) - strlen($found));
+            $retIndex = count($ret) - 1;
+            if (isset($ret[$retIndex])) {
+                $expr = $ret[$retIndex]->expr;
+                if (preg_match('/\s*--\s.*$/', $expr, $matches)) {
+                    $found = $matches[0];
+                    $ret[$retIndex]->expr = substr($expr, 0, strlen($expr) - strlen($found));
+                }
             }
         }