Bug with @var tag in docblock

[Warxcell]

I'm parsing this file's docblocks:

https://github.com/bzikarsky/gelf-php/blob/master/src/Gelf/Publisher.php

and

/**
* @var Set
*/
protected $transports;

becomes

/**
* 
*
* @var \Set $ 
*/
protected $transports;

When using serializer to modify the docblock and save it back to file.

And then when parsed again, it throws InvalidArgumentException.

HP Fatal error:  Uncaught exception 'InvalidArgumentException' with message 'Expected a string. Got: boolean' in vendor/webmozart/assert/src/Assert.php:942
Stack trace:
#0 vendor/webmozart/assert/src/Assert.php(157): Webmozart\Assert\Assert::reportInvalidArgument('Expected a stri...')
#1 vendor/phpdocumentor/reflection-docblock/src/DocBlock/Tags/Var_.php(43): Webmozart\Assert\Assert::string(false)
#2 vendor/phpdocumentor/reflection-docblock/src/DocBlock/Tags/Var_.php(84): phpDocumentor\Reflection\DocBlock\Tags\Var_->__construct(false, Object(phpDocumentor\Reflection\Types\Object_), Object(phpDocumentor\Reflection\DocBlock\Description))
#3 [internal function]: phpDocumentor\Reflection\DocBlock\Tags\Var_::create('\Set $', Object(phpDocumentor\Reflection\TypeResolver), Object(phpDocumentor\Reflection\DocBlock\DescriptionFactory), Object(phpDocumentor\Reflection\Types\Context))