PHP Fatal error: Cannot redeclare Safe\substr()

[bendavies]

Bug Report

Subject	Details
Rector version	Rector 0.8.x-dev@8b66cbc
Installed as	git checkout

Minimal PHP Code Causing Issue

Running rector on a project that has thecodingmachine/safe installed errors with:

PHP Fatal error:  Cannot redeclare Safe\substr() (previously declared in /Code/project/vendor/thecodingmachine/safe/generated/strings.php:532) in /Code/rector/rules/coding-style/tests/Rector/Namespace_/ImportFullyQualifiedNamesRector/Source/safe_count.php on line 12

Expected Behaviour

No error.