Can't parse YAML that the parser used to be able to parse #25786
Description
| Q | A |
|---|---|
| Bug report? | yes |
| Feature request? | no |
| BC Break report? | yes |
| RFC? | no |
| Symfony version | first occurred in 3.3 |
Symfony 3.2 is able to parse yaml that looks like this:
factory.keyvalue.expirable:
{}
# Default key/value expirable storage service to use.
# @default keyvalue.database.expirable
# default: keyvalue.database.expirable
Symfony 3.3+ it results in Uncaught Symfony\Component\Yaml\Exception\ParseException: Unable to parse at line 2 (near "{}")
Using git bisect shows that this break was introduced by #25241