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https://issues.apache.org/jira/browse/GROOVY-7668?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pascal Schumacher resolved GROOVY-7668.
---------------------------------------
       Resolution: Fixed
         Assignee: Pascal Schumacher
    Fix Version/s: 2.4.6

Pull request merged. Thanks!

> Better error-message for AST transformation when binary compatibility changes
> -----------------------------------------------------------------------------
>
>                 Key: GROOVY-7668
>                 URL: https://issues.apache.org/jira/browse/GROOVY-7668
>             Project: Groovy
>          Issue Type: Improvement
>    Affects Versions: 2.4.5
>         Environment: Grails 3.0.0 to 3.0.9
>            Reporter: Søren Berg Glasius
>            Assignee: Pascal Schumacher
>             Fix For: 2.4.6
>
>
> When a dependency changes signature, and this dependency is used in an AST 
> transformation, a compilation error can occur, but the error message is 
> presented to the developer does not give any hint to, where the error was.
> In this case, the Reactor framework used in Grails 3.0.0 changed version 
> (started using generics) to a never version in Grails 3.0.9. This caused the 
> following compilation error:
> {code}
> General error during class generation: 
> java.lang.reflect.MalformedParameterizedTypeException
> ​
> java.lang.reflect.MalformedParameterizedTypeException
>       at 
> sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.validateConstructorArguments(ParameterizedTypeImpl.java:58)
>       at 
> sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.<init>(ParameterizedTypeImpl.java:51)
>       at 
> sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.make(ParameterizedTypeImpl.java:92)
>       at 
> sun.reflect.generics.factory.CoreReflectionFactory.makeParameterizedType(CoreReflectionFactory.java:105)
>       at 
> sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:140)
>       at 
> sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:49)
>       at 
> sun.reflect.generics.repository.MethodRepository.getReturnType(MethodRepository.java:68)
>       at java.lang.reflect.Method.getGenericReturnType(Method.java:255)
>       at 
> org.codehaus.groovy.vmplugin.v5.Java5.configureClassNode(Java5.java:364)
>       at org.codehaus.groovy.ast.ClassNode.lazyClassInit(ClassNode.java:265)
>       at 
> org.codehaus.groovy.ast.ClassNode.getUnresolvedSuperClass(ClassNode.java:1004)
>       at 
> org.codehaus.groovy.ast.ClassNode.getUnresolvedSuperClass(ClassNode.java:999)
>       at org.codehaus.groovy.ast.ClassNode.getSuperClass(ClassNode.java:993)
>       at org.codehaus.groovy.ast.ClassNode.isDerivedFrom(ClassNode.java:936)
>       at 
> org.codehaus.groovy.classgen.asm.InvocationWriter.castToNonPrimitiveIfNecessary(InvocationWriter.java:858)
>       at 
> org.codehaus.groovy.classgen.asm.OperandStack.doConvertAndCast(OperandStack.java:347)
>       at 
> org.codehaus.groovy.classgen.asm.OperandStack.doGroovyCast(OperandStack.java:282)
>       at 
> org.codehaus.groovy.classgen.asm.BinaryExpressionHelper.evaluateEqual(BinaryExpressionHelper.java:400)
>       at 
> org.codehaus.groovy.classgen.asm.BinaryExpressionHelper.eval(BinaryExpressionHelper.java:84)
>       at 
> org.codehaus.groovy.classgen.AsmClassGenerator.visitBinaryExpression(AsmClassGenerator.java:638)
>       at 
> org.codehaus.groovy.ast.expr.BinaryExpression.visit(BinaryExpression.java:51)
>       at 
> org.codehaus.groovy.classgen.asm.StatementWriter.writeExpressionStatement(StatementWriter.java:607)
>       at 
> org.codehaus.groovy.classgen.asm.OptimizingStatementWriter.writeExpressionStatement(OptimizingStatementWriter.java:349)
>       at 
> org.codehaus.groovy.classgen.AsmClassGenerator.visitExpressionStatement(AsmClassGenerator.java:620)
>       at 
> org.codehaus.groovy.ast.stmt.ExpressionStatement.visit(ExpressionStatement.java:42)
>       at 
> org.codehaus.groovy.classgen.asm.StatementWriter.writeBlockStatement(StatementWriter.java:84)
>       at 
> org.codehaus.groovy.classgen.asm.OptimizingStatementWriter.writeBlockStatement(OptimizingStatementWriter.java:158)
>       at 
> org.codehaus.groovy.classgen.AsmClassGenerator.visitBlockStatement(AsmClassGenerator.java:566)
>       at 
> org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:71)
>       at 
> org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClassCodeContainer(ClassCodeVisitorSupport.java:104)
>       at 
> org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitConstructorOrMethod(ClassCodeVisitorSupport.java:115)
>       at 
> org.codehaus.groovy.classgen.AsmClassGenerator.visitStdMethod(AsmClassGenerator.java:430)
>       at 
> org.codehaus.groovy.classgen.AsmClassGenerator.visitConstructorOrMethod(AsmClassGenerator.java:387)
>       at 
> org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitMethod(ClassCodeVisitorSupport.java:126)
>       at 
> org.codehaus.groovy.classgen.AsmClassGenerator.visitMethod(AsmClassGenerator.java:507)
>       at org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1086)
>       at 
> org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:53)
>       at 
> org.codehaus.groovy.classgen.AsmClassGenerator.visitClass(AsmClassGenerator.java:233)
>       at 
> org.codehaus.groovy.control.CompilationUnit$16.call(CompilationUnit.java:813)
>       at 
> org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1055)
>       at 
> org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:591)
>       at 
> org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:569)
>       at 
> org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:546)
>       at 
> org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:525)
>       at 
> org.gradle.api.internal.tasks.compile.ApiGroovyCompiler.execute(ApiGroovyCompiler.java:180)
>       at 
> org.gradle.api.internal.tasks.compile.ApiGroovyCompiler.execute(ApiGroovyCompiler.java:53)
>       at 
> org.gradle.api.internal.tasks.compile.daemon.CompilerDaemonServer.execute(CompilerDaemonServer.java:53)
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.lang.reflect.Method.invoke(Method.java:497)
>       at 
> org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
>       at 
> org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
>       at 
> org.gradle.messaging.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:360)
>       at 
> org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
>       at 
> org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>       at java.lang.Thread.run(Thread.java:745)
> ​
> 1 error
> {code} 
> If the compilation error was caught in 
> `org.codehaus.groovy.vmplugin.v5.Java5.configureClassNode(Java5.java:364)` it 
> would be possible to output what class and what the reason was for the error 
> before re-throwing it. 



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