Unsupported class file major version 65 when running on java 21

Hi

We are using Jasper that bundles Groovy (4.0.8) but are getting:

org.codehaus.groovy.GroovyBugError: BUG! exception in phase 'semantic
analysis' in source unit
'calculator_fin_lay_003_f17d19ddf85e94f0e0558ad16053ed00cbb6578a89a5f69df26044d903df00e6'
Unsupported class file major version 65
at
org.codehaus.groovy.control.CompilationUnit$ISourceUnitOperation.doPhaseOperation(CompilationUnit.java:900)
~[groovy-4.0.8.jar:4.0.8]
at
org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:692)
~[groovy-4.0.8.jar:4.0.8]
at
org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:666)
~[groovy-4.0.8.jar:4.0.8]
at
net.sf.jasperreports.compilers.JRGroovyCompiler.compileUnits(JRGroovyCompiler.java:112)
~[jasperreports-6.21.0.jar:6.21.0-unknown]
at
net.sf.jasperreports.engine.design.JRAbstractCompiler.compileReport(JRAbstractCompiler.java:231)
~[jasperreports-6.21.0.jar:6.21.0-unknown]


now i tried to search and find anything related what groovy really is
supported on what version

and i can't really find anything related to this.. I do get go gradle (and
you need 8.5 for java 21) but nothing really related to the actual groovy
version and what groovy is supporting (not from but until)


I do find more people with the same problem, but no real answers on those
questions..

johan




-- 
Johan Compagner
Servoy