org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed

[attiand]

Running the example-application from https://picocli.info/#_groovy_scripts

@Grab('info.picocli:picocli-groovy:4.7.0')
@GrabConfig(systemClassLoader=true)
@Command(name = "myScript",
        mixinStandardHelpOptions = true, // add --help and --version options
        description = "@|bold Groovy script|@ @|underline picocli|@ example")
@picocli.groovy.PicocliScript2
import groovy.transform.Field
import static picocli.CommandLine.*

@Option(names = ["-c", "--count"], description = "number of repetitions")
@Field int count = 1;

// PicocliBaseScript2 prints usage help or version if requested by the user

count.times {
   println "hi"
}
// the CommandLine that parsed the args is available as a property
assert this.commandLine.commandName == "myScript"

with picocli 4.7.0 I get

;groovy test.groovy 
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
General error during conversion: Error registering runner class 'org.codehaus.groovy.testng.TestNgRunner'

java.lang.IllegalStateException: Error registering runner class 'org.codehaus.groovy.testng.TestNgRunner'
	at groovy.grape.GrapeIvy$_processRunners_closure6.doCall(GrapeIvy.groovy:414)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:343)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:328)
	at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:279)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1009)
	at groovy.lang.Closure.call(Closure.java:418)
	at groovy.lang.Closure.call(Closure.java:434)
	at org.codehaus.groovy.runtime.DefaultGroovyMethods.each(DefaultGroovyMethods.java:2388)
	at org.codehaus.groovy.runtime.DefaultGroovyMethods.each(DefaultGroovyMethods.java:2373)
	at org.codehaus.groovy.runtime.DefaultGroovyMethods.each(DefaultGroovyMethods.java:2414)
	at groovy.grape.GrapeIvy.processRunners(GrapeIvy.groovy:409)
	at groovy.grape.GrapeIvy.processMetaInfServices(GrapeIvy.groovy:386)
	at groovy.grape.GrapeIvy.grab(GrapeIvy.groovy:289)
	at groovy.grape.Grape$1.run(Grape.java:172)
	at groovy.grape.Grape$1.run(Grape.java:158)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:318)
	at groovy.grape.Grape.grab(Grape.java:158)
	at groovy.grape.GrabAnnotationTransformation.visit(GrabAnnotationTransformation.java:380)
	at org.codehaus.groovy.transform.ASTTransformationVisitor.lambda$addPhaseOperationsForGlobalTransforms$5(ASTTransformationVisitor.java:377)
	at org.codehaus.groovy.control.CompilationUnit$ISourceUnitOperation.doPhaseOperation(CompilationUnit.java:896)
	at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:692)
	at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:666)
	at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:373)
	at groovy.lang.GroovyClassLoader.lambda$parseClass$2(GroovyClassLoader.java:316)
	at org.codehaus.groovy.runtime.memoize.StampedCommonCache.compute(StampedCommonCache.java:163)
	at org.codehaus.groovy.runtime.memoize.StampedCommonCache.getAndPut(StampedCommonCache.java:154)
	at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:314)
	at groovy.lang.GroovyShell.parseClass(GroovyShell.java:572)
	at groovy.lang.GroovyShell.run(GroovyShell.java:392)
	at groovy.lang.GroovyShell.run(GroovyShell.java:382)
	at groovy.ui.GroovyMain.processOnce(GroovyMain.java:649)
	at groovy.ui.GroovyMain.run(GroovyMain.java:389)
	at groovy.ui.GroovyMain.access$1400(GroovyMain.java:67)
	at groovy.ui.GroovyMain$GroovyCommand.process(GroovyMain.java:313)
	at groovy.ui.GroovyMain.processArgs(GroovyMain.java:141)
	at groovy.ui.GroovyMain.main(GroovyMain.java:114)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.codehaus.groovy.tools.GroovyStarter.rootLoader(GroovyStarter.java:109)
	at org.codehaus.groovy.tools.GroovyStarter.main(GroovyStarter.java:132)
Caused by: org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object 'org.codehaus.groovy.testng.TestNgRunner@476ec9d0' with class 'org.codehaus.groovy.testng.TestNgRunner' to class 'org.apache.groovy.plugin.GroovyRunner'
	at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnSAM(DefaultTypeTransformation.java:424)
	at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnNumber(DefaultTypeTransformation.java:335)
	at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:255)
	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.castToType(ScriptBytecodeAdapter.java:621)
	at groovy.grape.GrapeIvy$_processRunners_closure6.doCall(GrapeIvy.groovy:412)
	... 45 more

1 error

;groovy --version
Groovy Version: 4.0.5 JVM: 17.0.5 Vendor: Red Hat, Inc. OS: Linux

The same example with picocli version 4.6.3 works fine.

[remkop]

Thank you for raising this! I hope I will have time to look at this the coming weekend.

[remkop]

I have reproduced the issue but have not made much progress with analysing the cause.

Potential causes are these changes:

• The picocli-groovy module should declare groovy-all as dependency #1613
• Make picocli-groovy an explicitly declared named JPMS module #1611

[paulk-asert]

You can remove the error by adding:

@GrabExclude('org.codehaus.groovy:groovy-all')

The issue is that you are getting Groovy from Groovy 4 but groovy-testng from the Groovy 2.4.21 groovy-all jar. It's a combination of the maven coordinate change from org.codehaus.groovy to org.apache.groovy plus possibly the fact that testng became an optional module with Groovy 4.

[remkop]

Thank you @paulk-asert for pointing that out, and for providing the workaround!

@GrabExclude('org.codehaus.groovy:groovy-all')

This issue was caused by #1613, which made picocli-groovy bring in the (old) org.codehaus.groovy:groovy-all dependency. Since any Groovy script will already need to have a Groovy environment in which it is run, picocli-groovy should not try to bring in Groovy op top of that.

This is fixed in the main branch now and the fix will be part of the picocli 4.7.1 release. Until then, please use the above workaround.