Hi there !

There is a deprecated for Symfony version above 4.2 where the Process requires an array when built. I noticed this thing for the Async Command bundle but may be present elsewhere. A quick fix is to check the version of Symfony, and choose the appropriate function like bellow:

if (Kernel::MAJOR_VERSION >= 4 && Kernel::MINOR_VERSION >= 2) {
    $process = Process::fromShellCommandline($phpBin.' '.$consoleBin.' '.$this->getCommandLine($command), $this->projectDir);
} else {
    $process = new Process($phpBin.' '.$consoleBin.' '.$this->getCommandLine($command), $this->projectDir);
}

It's a deprecation. Process constructor will fall back to fromShellCommandline until Symfony 5.0.

Prefered solution would be to use an array argument.

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