[Php55] Handle crash on ([[:upper:]]+) regex on PregReplaceEModifierRector

rules-tests/Php55/Rector/FuncCall/PregReplaceEModifierRector/Fixture/skip_no_modifier.php.inc

@@ -0,0 +1,16 @@
+<?php
+
+namespace Rector\Tests\Php55\Rector\FuncCall\PregReplaceEModifierRector\Fixture;
+
+class SkipNoModifier
+{
+    public function run()
+    {
+        echo preg_replace('([[:upper:]]+)', '_$0', 'FOO');
+    }
+
+    public function run2()
+    {
+        echo preg_replace('{[[:upper:]]+}', '_$0', 'FOO');
+    }
+}

rules/Php55/RegexMatcher.php

@@ -46,6 +46,10 @@ public function resolvePatternExpressionWithoutEIfFound(Expr $expr): Concat|Stri
                 return null;
             }
 
+            if (in_array($pattern[strlen($pattern) - 1], [')', '}', ']', '>'], true)) {
+                return null;
+            }
+
             $patternWithoutE = $this->createPatternWithoutE($pattern, $delimiter, $modifiers);
             return new String_($patternWithoutE);
         }