[Php70] Handle crash on EregToPregMatchRector (#2460)

* Add fixture 5 to `ereg to preg match`

* Closes #2459

Co-authored-by: Thibault <thibault.andreis@gmail.com>

rules-tests/Php70/Rector/FuncCall/EregToPregMatchRector/Fixture/fixture5.php.inc

@@ -0,0 +1,23 @@
+<?php
+
+namespace Rector\Tests\Php70\Rector\FuncCall\EregToPregMatchRector\Fixture;
+
+function eregToPregMatch5()
+{
+    ereg_replace('[^0-9.-]', ' ', 'le 09.78-95 65/02');
+
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\Php70\Rector\FuncCall\EregToPregMatchRector\Fixture;
+
+function eregToPregMatch5()
+{
+    preg_replace('#[^0-9\.\-]#m', ' ', 'le 09.78-95 65/02');
+
+}
+
+?>

rules/Php70/EregToPcreTransformer.php

@@ -247,7 +247,7 @@ private function processSquareBracket(string $s, int $i, int $l, string $cls, bo
 
                 if ($i < $l && $s[$i] === '-') {
                     $b = $s[++$i];
-                    ++$i;
+
                     if ($b === ']') {
                         $cls .= $this->_ere2pcre_escape($a) . '\-';
                         break;
@@ -257,6 +257,8 @@ private function processSquareBracket(string $s, int $i, int $l, string $cls, bo
                     }
 
                     $cls .= $this->_ere2pcre_escape($a) . '-' . $this->_ere2pcre_escape($b);
+
+                    ++$i;
                 } else {
                     $cls .= $this->_ere2pcre_escape($a);
                 }