$SUBJ says it all ...
We don't have any error-badging at the moment whatsoever. Correct me if I'm wrong, but shouldn't be that in the very first release?
Would be nice, but in next release.
*** Bug 149072 has been marked as a duplicate of this bug. ***
This is still valid! And quite important. Even .groovy files (not in Grails project) doesn't show any error badge. There is probably not enough time to do this for 7.2, but it really should be done in Next release!
Also increasing priority to P1.
Fixed in: web-main #d422846ee4b2
Integrated into 'main-golden', will be available in build *201210050002* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Martin Janicek <email@example.com>
Log: #132778 - Pervasive support for error-badges in Groovy/Grails projects