phpcsfixer ProcessUtils::escapeArgument() error

[bastos71]

Q	A
Version	0.15.0
Bug?	yes
New feature?	no
Question?	no
Documentation?	no
Related tickets	None

Seems like ProcessUtils::escapeArgument is too strict and cannot convert an input file into an absolute path, resulting into a Fatal Error when using phpcsfixer task.

My configuration

parameters:
    git_dir: .
    bin_dir: ./vendor/bin
    hooks_preset: vagrant
    process_timeout: 300
    ascii:
        failed: ~
        succeeded: ~
    tasks:
        phpcsfixer:
            metadata:
                priority: 100                

Steps to reproduce:

# Generate empty folder
mkdir tmp
cd tmp
git init
echo "vendor" > .gitignore
pbpaste > grumphp.yml
composer require phpro/grumphp 0.15.0
composer require friendsofphp/php-cs-fixer

echo "<?php /** This is a sample PHP File */" > sample.php

# Run GrumpHP:
./vendor/bin/grumphp run

Result:

GrumPHP is sniffing your code!
Running task 1/1: PhpCsFixer... PHP Fatal error:  Uncaught TypeError: Argument 1 passed to GrumPHP\Process\ProcessUtils::escapeArgument() must be of the type string, object given, called in /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Process/ProcessFactory.php on line 20 and defined in /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Process/ProcessUtils.php:31
Stack trace:
#0 /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Process/ProcessFactory.php(20): GrumPHP\Process\ProcessUtils::escapeArgument(Object(Symfony\Component\Finder\SplFileInfo))
#1 [internal function]: GrumPHP\Process\ProcessFactory::GrumPHP\Process\{closure}(Object(Symfony\Component\Finder\SplFileInfo))
#2 /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Process/ProcessFactory.php(21): array_map(Object(Closure), Array)
#3 /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Process/ProcessBuilder.php(40): GrumPHP\Process\ProcessFactory::fromArguments(Object(GrumPHP\Collection\ProcessArgumentsCollection))
#4 /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Task/AbstractPhpCsFixe in /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Process/ProcessUtils.php on line 31

Fatal error: Uncaught TypeError: Argument 1 passed to GrumPHP\Process\ProcessUtils::escapeArgument() must be of the type string, object given, called in /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Process/ProcessFactory.php on line 20 and defined in /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Process/ProcessUtils.php:31
Stack trace:
#0 /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Process/ProcessFactory.php(20): GrumPHP\Process\ProcessUtils::escapeArgument(Object(Symfony\Component\Finder\SplFileInfo))
#1 [internal function]: GrumPHP\Process\ProcessFactory::GrumPHP\Process\{closure}(Object(Symfony\Component\Finder\SplFileInfo))
#2 /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Process/ProcessFactory.php(21): array_map(Object(Closure), Array)
#3 /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Process/ProcessBuilder.php(40): GrumPHP\Process\ProcessFactory::fromArguments(Object(GrumPHP\Collection\ProcessArgumentsCollection))
#4 /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Task/AbstractPhpCsFixe in /var/www/_tmp/grumphp/tmp/vendor/phpro/grumphp/src/Process/ProcessUtils.php on line 31