diff --git a/src/Symfony/Component/Console/Helper/ProcessHelper.php b/src/Symfony/Component/Console/Helper/ProcessHelper.php
index 666f114a23c4a..951bb854ec93f 100644
--- a/src/Symfony/Component/Console/Helper/ProcessHelper.php
+++ b/src/Symfony/Component/Console/Helper/ProcessHelper.php
@@ -37,6 +37,10 @@ class ProcessHelper extends Helper
*/
public function run(OutputInterface $output, $cmd, $error = null, callable $callback = null, $verbosity = OutputInterface::VERBOSITY_VERY_VERBOSE)
{
+ if (!class_exists(Process::class)) {
+ throw new \LogicException('The Process helper requires the "Process" component. Install "symfony/process" to use it.');
+ }
+
if ($output instanceof ConsoleOutputInterface) {
$output = $output->getErrorOutput();
}
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