We have a lot of Jenkins jobs that fail due to ill-formed yaml.
Unfortunately, These often throw useless Java exceptions that are 

I would like to invoke a yaml checker/sanitizer on that yaml, BEFORE 
Jenkins starts parsing it.

Does anyone know if a Plugin exists, or if there is another way to validate 
YAML before it is parsed?
I've noticed that copying and pasting yaml from a text file into the 
Pipeline file can also cause the yaml to be ill-formed, so
we need to catch that and display a useful error message, instead of a 
useless Java exception.

I can't believe that Jenkins is so fragile that it crashes due to bad yaml.

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