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From "Dan Nimick (JIRA)" <>
Subject [jira] [Created] (GROOVY-7541) GroovyBugError in TypeTransformer.addTransformer
Date Wed, 05 Aug 2015 16:02:05 GMT
Dan Nimick created GROOVY-7541:

             Summary: GroovyBugError in TypeTransformer.addTransformer
                 Key: GROOVY-7541
             Project: Groovy
          Issue Type: Bug
          Components: groovy-runtime
    Affects Versions: 2.4.4
         Environment: Java web app on either Apache on Linux or Windows,  or WebSphere on
AIX. Java 7.1. Groovy via ScriptEngineManager.getEngineByName("groovy")
            Reporter: Dan Nimick
             Fix For: 2.3.7

Just updated from Groovy 2.3.6 to 2.4.4 and this code no longer works when dynamic invocation
is used (works fine when indy not used):

d1.setIndexes(new HashMap<List<String>,DatasetIndex>());

where d1 is one of the Java classes imported to the Groovy script. setIndexes is just a plain
setter of a field on the class. The error is

BUG! Unknown transformation for argument <... stuff from toString of d1 here...> at
position 0 with class for parameter of type class org.codehaus.groovy.vmplugin.v7.IndyInterface

It contains no stack trace, but by searching for sources of "Unknown transformation for argument",
I found it to be in TypeTransformer.addTransformer. If I put a breakpoint there, this is the
call stack:

TypeTransformers.addTransformer(MethodHandle, int, Object, Class) line: 124	
Selector$MethodSelector.correctCoerce() line: 793	
Selector$MethodSelector.setCallSiteTarget() line: 958	
IndyInterface.selectMethod(MutableCallSite, Class, String, int, Boolean, Boolean, Boolean,
Object, Object[]) line: 214 line: 2	
GroovyScriptEngineImpl.eval(Class, ScriptContext) line: 323	
GroovyScriptEngineImpl.eval(String, ScriptContext) line: 124	
GroovyScriptEngineImpl(AbstractScriptEngine).eval(String) line: 276	

Looks like TypeTransformer was introduced via org.codehaus.groovy.vmplugin.v7 in version 2.3.8,
but I don't see anything in the 2.3.8 change log about it (at least not under an obvious description).

FWIW, we turn on dynamic invocation via:

    CompilerConfiguration configuration = new CompilerConfiguration();     configuration.setTargetBytecode(System.getProperty("java.specification.version"));

    configuration.getOptimizationOptions().put("indy", true); 
    configuration.getOptimizationOptions().put("int", false); 
    GroovyClassLoader gcl = new GroovyClassLoader(this.getClass().getClassLoader(), configuration);
      ((GroovyScriptEngineImpl) engine).setClassLoader(gcl);

Please let me know if any more info is needed, or if there is a work around (other than not
using indy).

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