Description
Symfony version(s) affected: 4.4.19
Description
symfony/yaml throws a Symfony\Component\Yaml\Exception\ParseException if it encounters a tab instead of space(s) after a colon, while tabs are valid as separation between tokens within a line according to the yaml spec: https://yaml.org/spec/1.2/spec.html#id2778241
Outside indentation and scalar content, YAML uses white space characters for separation between tokens within a line. Note that such white space may safely include tab characters.
(Emphasis mine)
How to reproduce
Use symfony/yaml to parse a yaml file with a tab after the colon of a key/value pair on a line.
For example:
'00D24000000JRFx:0012400000R6XYH': 95290dcc-8d1d-4b9f-952e-496562f53e35
Possible Solution
Allow tabs for separation between tokens within a line, as described in the yaml spec.
If I find some time I might look into a possible fix and make a PR myself unless someone else beats me to it.
Additional context
It has been mentioned in other issues like #15674 that tabs are not allowed in yaml files. But this is only the case for indentation.
While I'm not a huge fan of it personally, it's an issue when a different linter tells us that a given YAML file with content that we have little control over has valid syntax in an unrelated check, and then our app crashes because it cannot be parsed after all.