left and right may not be used as keyword but no error shown example:

editor-error:
e@Rop(LT(),foo,right) -> (e, $[one of values is not of type Integer])
where right

should give a warning not to use right

Submitted on 21 November 2010 at 12:40

Indeed, this is an annoying problem. The root cause here is that you imported the ‘left’ and ‘right’ symbols into the Stratego program, but the editor doesn’t know about it because they imports are not in the current file. This bug is a duplicate of Spoofax/214.