Scala Backward Compatibility

Question

What changes or code evolution break backward compatibility (mainly binary compatibility)? Is it fully specified anywhere?

I checked the Scala language specification, b

Answer 1

I've added support for Scala to the japi-compliance-checker tool (1.6 version). So now you can identify breaking changes in your code automatically. The tool is available here: https://github.com/lvc/japi-compliance-checker

Sample usage:

japi-compliance-checker OLD.jar NEW.jar

Also I've created a page with analysis reports for Scala versions evolution generated by this tool as an example: http://abi-laboratory.pro/java/tracker/timeline/scala/