From 080cf610646ace3eb12881c1d09c1de52de89656 Mon Sep 17 00:00:00 2001
From: Thomas Bley <mails@thomasbley.de>
Date: Thu, 14 Jan 2021 22:33:49 +0100
Subject: [PATCH] fix #5010 function exec() is disabled (#5012)

* fix #5010 function exec() is disabled

* Improve error message

Co-authored-by: Thomas Bley <thomas.bley@bringmeister.de>
Co-authored-by: Matthew Brown <github@muglug.com>
---
 .../Internal/ExecutionEnvironment/SystemCommandExecutor.php   | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Psalm/Internal/ExecutionEnvironment/SystemCommandExecutor.php b/src/Psalm/Internal/ExecutionEnvironment/SystemCommandExecutor.php
index 0354900dd20..a78e3078d73 100644
--- a/src/Psalm/Internal/ExecutionEnvironment/SystemCommandExecutor.php
+++ b/src/Psalm/Internal/ExecutionEnvironment/SystemCommandExecutor.php
@@ -22,6 +22,10 @@ final class SystemCommandExecutor
      */
     public function execute(string $command) : array
     {
+        if (!\function_exists('exec')) {
+            throw new \RuntimeException(sprintf('exec does not exist, failed to execute command: %s', $command));
+        };
+
         exec($command, $result, $returnValue);
 
         if ($returnValue === 0) {