CountOnNullRector error

[JoyceBabu]

Subject	Details
Rector version	v0.6.1
PHP version	PHP 7.3.12
Full Command	composer/bin/rector process rector/test.php -vvv

Current Behaviour

composer/bin/rector process rector -vvv
Rector v0.6.1
Config file: rector.yaml

[parsing] rector/abc.php
[refactoring] rector/abc.php
    [applying] Rector\Php71\Rector\FuncCall\CountOnNullRector
PHP Exception:  Return value of Rector\NodeTypeResolver\NodeTypeResolver::getScopeNode() must implement interface PhpParser\Node, null returned in /my/dir/composer/rector/rector/packages/NodeTypeResolver/src/NodeTypeResolver.php on line 658

TypeError: Return value of Rector\NodeTypeResolver\NodeTypeResolver::getScopeNode() must implement interface PhpParser\Node, null returned in /my/dir/composer/rector/rector/packages/NodeTypeResolver/src/NodeTypeResolver.php:658
Stack trace:
#0 /my/dir/composer/rector/rector/packages/NodeTypeResolver/src/NodeTypeResolver.php(666): Rector\NodeTypeResolver\NodeTypeResolver->getScopeNode(Object(PhpParser\Node\Expr\Variable))
#1 /my/dir/composer/rector/rector/packages/NodeTypeResolver/src/NodeTypeResolver.php(626): Rector\NodeTypeResolver\NodeTypeResolver->getVariableUsages(Object(PhpParser\Node\Expr\Variable))
#2 /my/dir/composer/rector/rector/packages/NodeTypeResolver/src/NodeTypeResolver.php(268): Rector\NodeTypeResolver\NodeTypeResolver->correctPregMatchType(Object(PhpParser\Node\Expr\Variable), Object(PHPStan\Type\NullType))
#3 /my/dir/composer/rector/rector/src/Rector/AbstractRector/NodeTypeResolverTrait.php(91): Rector\NodeTypeResolver\NodeTypeResolver->isCountableType(Object(PhpParser\Node\Expr\Variable))
#4 /my/dir/composer/rector/rector/packages/Php71/src/Rector/FuncCall/CountOnNullRector.php(76): Rector\Rector\AbstractRector->isCountableType(Object(PhpParser\Node\Expr\Variable))
#5 /my/dir/composer/rector/rector/src/Rector/AbstractRector.php(116): Rector\Php71\Rector\FuncCall\CountOnNullRector->refactor(Object(PhpParser\Node\Expr\FuncCall))
#6 /my/dir/composer/nikic/php-parser/lib/PhpParser/NodeTraverser.php(123): Rector\Rector\AbstractRector->enterNode(Object(PhpParser\Node\Expr\FuncCall))
#7 /my/dir/composer/nikic/php-parser/lib/PhpParser/NodeTraverser.php(223): PhpParser\NodeTraverser->traverseNode(Object(PhpParser\Node\Stmt\Expression))
#8 /my/dir/composer/nikic/php-parser/lib/PhpParser/NodeTraverser.php(91): PhpParser\NodeTraverser->traverseArray(Array)
#9 /my/dir/composer/rector/rector/src/PhpParser/NodeTraverser/RectorNodeTraverser.php(62): PhpParser\NodeTraverser->traverse(Array)
#10 /my/dir/composer/rector/rector/src/Application/FileProcessor.php(134): Rector\PhpParser\NodeTraverser\RectorNodeTraverser->traverse(Array)
#11 /my/dir/composer/rector/rector/src/Application/RectorApplication.php(155): Rector\Application\FileProcessor->refactor(Object(Symplify\SmartFileSystem\SmartFileInfo))
#12 /my/dir/composer/rector/rector/src/Application/RectorApplication.php(221): Rector\Application\RectorApplication->Rector\Application\{closure}(Object(Symplify\SmartFileSystem\SmartFileInfo))
#13 /my/dir/composer/rector/rector/src/Application/RectorApplication.php(156): Rector\Application\RectorApplication->tryCatchWrapper(Object(Symplify\SmartFileSystem\SmartFileInfo), Object(Closure), 'refactoring')
#14 /my/dir/composer/rector/rector/src/Console/Command/ProcessCommand.php(188): Rector\Application\RectorApplication->runOnFileInfos(Array)
#15 /my/dir/composer/symfony/console/Command/Command.php(255): Rector\Console\Command\ProcessCommand->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#16 /my/dir/composer/rector/rector/src/Console/Command/AbstractCommand.php(34): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#17 /my/dir/composer/symfony/console/Application.php(1011): Rector\Console\Command\AbstractCommand->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#18 /my/dir/composer/symfony/console/Application.php(272): Symfony\Component\Console\Application->doRunCommand(Object(Rector\Console\Command\ProcessCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#19 /my/dir/composer/rector/rector/src/Console/Application.php(93): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#20 /my/dir/composer/symfony/console/Application.php(148): Rector\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#21 /my/dir/composer/rector/rector/bin/rector(48): Symfony\Component\Console\Application->run()
#22 {main}
[Fatal Error] Exception: Return value of Rector\NodeTypeResolver\NodeTypeResolver::getScopeNode() must implement interface PhpParser\Node, null returned in /my/dir/composer/rector/rector/packages/NodeTypeResolver/src/NodeTypeResolver.php on line 658

Minimal PHP Code Causing Issue

<?php
$arAuth = null;

count($arAuth);

Expected Behaviour

Rector should run without error

[JoyceBabu]

    private function getVariableUsages(Variable $variable): array
    {
        $scope = $this->getScopeNode($variable);

        return $this->betterNodeFinder->find((array) $scope->stmts, function (Node $node) use ($variable): bool {
            return $node instanceof Variable && $node->name === $variable->name;
        });
    }

    private function getScopeNode(Node $node): Node
    {
        return $node->getAttribute(AttributeKey::METHOD_NODE)
            ?? $node->getAttribute(AttributeKey::FUNCTION_NODE)
            ?? $node->getAttribute(AttributeKey::NAMESPACE_NODE);
    }

getScopeNode is attempting to return null, since it is not within any of the above scopes. Is there an attribute for the global scope? Since global scope can be spread over multiple files, shouldn't correctPregMatchType return immediately when not inside one of the above scopes?