| Q | A | ---------------- | ----- | Bug report? | yes | Feature request? | no | BC Break report? | yno | RFC? | no | Symfony version | 4.0.2 When using constant in yaml like ```!php/const:App\Kernel::SEMART_VERSION``` in Symfony 4.0.2 is catching an error ```Notice: Uninitialized string offset: 69 in <yaml file path>``` When use 3.4.2 version, the error is gone