serializing a mutable.Map with a default value loses the default value

[dirkgr]

I have some sample code here: https://gist.github.com/dirkgr/bc0e8b547015db9e67c7

In short, the code creates a scala.collections.mutable.HashMap and adds a default value. When round-tripping it through a chill file, it loses the default value.

[dirkgr]

It seems this is serialized by TraversableSerializer, which ignores the default value.

[johnynek]

Thanks for the bug-report. It would be good to fix this. I guess other maps may have the same issue, but defaults are just not that often used.