`null` Object Id serialized as anchor for YAML

[jflefebvre06]

Bug detected into com.fasterxml.jackson.databind.ser.impl.WritableObjectId#writeAsField

gen.writeObjectId(String.valueOf(id));

shoud be if(id!=null)gen.writeObjectId(String.valueOf(id));

[cowtowncoder]

Any chance you could write a test case to show the problem? I agree that fix sounds legit, but I am trying to figure out where does the null id come from. Why is caller not suppressing such a call?

[jflefebvre06]

Yes of course, please find the belowed test.

Issue63Test.zip

[jflefebvre06]

@cowtowncoder Hello, do you reproduce with my sample ?

[cowtowncoder]

@jflefebvre06 Thank you for reminder! Unfortunately I haven't had time to look into this, but I now added it on Work-in-progress page:

https://github.com/FasterXML/jackson-future-ideas/wiki/Jackson-Work-in-Progress

to improve chances I'll get here soon. Apologies for delays.

[jflefebvre06]

Works fine thank you

[cowtowncoder]

@jflefebvre06 thank you for verification.