groovy-2.5.0-SNAPSHOT has the same trivial issue(".shelf"). In addition, Groovy Version can not be shown properly(Groovy Version: #ImplementationVersion#):
C:\Users\Daniel>groovy -v Groovy Version: #ImplementationVersion# JVM: 1.8.0_121 Vendor: Oracle Corporation OS: Windows 10 Cheers, Daniel.Sun -- Sent from: http://groovy.329449.n5.nabble.com/Groovy-Dev-f372993.html