When I download latest QuickBuild tar file, 'com.pmease.quickbuild_10.0.X.jar" contains 'groovy-all-1.8.9.jar' file.
I tried to update that jar file from old one to latest stable groovy jar file which is located here.
Obviosuly, the version is '3.0.4' now.
When I replace that 'groovy-all' jar file to the latest version, it works fine, in my test cases.
Do you have a plan to upgrade groovy langauge version in QuickBuild?
Since groovy 3.0 version, it introduces some useful features.