From 68a6c53a57156a5efb2073b1eb3f2d79a46c9dc2 Mon Sep 17 00:00:00 2001
From: jmarcil <jonathan.marcil@owasp.org>
Date: Mon, 5 Aug 2019 12:34:55 -0700
Subject: [PATCH] solves #40

---
 Security/Sniffs/BadFunctions/SystemExecFunctionsSniff.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Security/Sniffs/BadFunctions/SystemExecFunctionsSniff.php b/Security/Sniffs/BadFunctions/SystemExecFunctionsSniff.php
index bb951f7..842779b 100644
--- a/Security/Sniffs/BadFunctions/SystemExecFunctionsSniff.php
+++ b/Security/Sniffs/BadFunctions/SystemExecFunctionsSniff.php
@@ -34,6 +34,9 @@ public function process(File $phpcsFile, $stackPtr) {
                 return;
             }
             $opener = $phpcsFile->findNext(T_OPEN_PARENTHESIS, $stackPtr, null, false, null, true);
+            if (!$opener) {
+              return;
+            }
 			$closer = $tokens[$opener]['parenthesis_closer'];
             $s = $stackPtr + 1;
 			$s = $phpcsFile->findNext(array_merge(\PHP_CodeSniffer\Util\Tokens::$emptyTokens, \PHP_CodeSniffer\Util\Tokens::$bracketTokens, \PHPCS_SecurityAudit\Sniffs\Utils::$staticTokens, array(T_STRING_CONCAT)), $s, $closer, true);