Major Description
The following Groovy script causes NPE at compile time:
Bug.groovy
@Grapes([
@Grab("org.slf4j:slf4j-api:1.7.22"),
@Grab("org.apache.kafka:kafka-clients:0.10.2.0")
])
import groovy.transform.Field
import org.apache.kafka.clients.producer.Callback
import org.apache.kafka.clients.producer.KafkaProducer
import org.apache.kafka.clients.producer.ProducerRecord
import org.apache.kafka.clients.producer.RecordMetadata
import org.slf4j.Logger
import org.slf4j.LoggerFactory
@Field static final Logger logger = LoggerFactory.getLogger(Bug.class)
wrapper {
Properties config = new Properties()
KafkaProducer kafkaProducer = new KafkaProducer<>(config)
kafkaProducer.send(new ProducerRecord<>('topic', 'data'), new Callback() {
@Override
void onCompletion(RecordMetadata recordMetadata, Exception e) {
if (e != null) {
logger.error("Error sending to Kafka", e)
}
}
})
}
Full error message from groovyc:
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed: General error during class generation: NPE while processing Bug.groovy groovy.lang.GroovyRuntimeException: NPE while processing Bug.groovy at org.codehaus.groovy.classgen.AsmClassGenerator.visitClass(AsmClassGenerator.java:258) at org.codehaus.groovy.control.CompilationUnit$16.call(CompilationUnit.java:813) at org.codehaus.groovy.control.CompilationUnit$16.call(CompilationUnit.java:830) at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1053) 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.codehaus.groovy.tools.FileSystemCompiler.compile(FileSystemCompiler.java:61) at org.codehaus.groovy.tools.FileSystemCompiler.doCompilation(FileSystemCompiler.java:217) at org.codehaus.groovy.tools.FileSystemCompiler.commandLineCompile(FileSystemCompiler.java:150) at org.codehaus.groovy.tools.FileSystemCompiler.commandLineCompileWithErrorHandling(FileSystemCompiler.java:180) at org.codehaus.groovy.tools.FileSystemCompiler.main(FileSystemCompiler.java:164) 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:498) at org.codehaus.groovy.tools.GroovyStarter.rootLoader(GroovyStarter.java:109) at org.codehaus.groovy.tools.GroovyStarter.main(GroovyStarter.java:131) Caused by: java.lang.NullPointerException at org.codehaus.groovy.classgen.AsmClassGenerator.visitFieldExpression(AsmClassGenerator.java:1049) at org.codehaus.groovy.classgen.asm.ClosureWriter.loadReference(ClosureWriter.java:135) at org.codehaus.groovy.classgen.asm.InvocationWriter.loadVariableWithReference(InvocationWriter.java:611) at org.codehaus.groovy.classgen.asm.InvocationWriter.writeAICCall(InvocationWriter.java:596) at org.codehaus.groovy.classgen.asm.InvocationWriter.writeInvokeConstructor(InvocationWriter.java:571) at org.codehaus.groovy.classgen.AsmClassGenerator.visitConstructorCallExpression(AsmClassGenerator.java:818) at org.codehaus.groovy.ast.expr.ConstructorCallExpression.visit(ConstructorCallExpression.java:46) at org.codehaus.groovy.classgen.asm.CallSiteWriter.makeCallSite(CallSiteWriter.java:303) at org.codehaus.groovy.classgen.asm.InvocationWriter.makeCachedCall(InvocationWriter.java:307) at org.codehaus.groovy.classgen.asm.InvocationWriter.makeCall(InvocationWriter.java:392) at org.codehaus.groovy.classgen.asm.InvocationWriter.makeCall(InvocationWriter.java:104) at org.codehaus.groovy.classgen.asm.InvocationWriter.makeInvokeMethodCall(InvocationWriter.java:88) at org.codehaus.groovy.classgen.asm.InvocationWriter.writeInvokeMethod(InvocationWriter.java:459) at org.codehaus.groovy.classgen.AsmClassGenerator.visitMethodCallExpression(AsmClassGenerator.java:767) at org.codehaus.groovy.ast.expr.MethodCallExpression.visit(MethodCallExpression.java:66) at org.codehaus.groovy.classgen.asm.StatementWriter.writeReturn(StatementWriter.java:589) at org.codehaus.groovy.classgen.asm.OptimizingStatementWriter.writeReturn(OptimizingStatementWriter.java:319) at org.codehaus.groovy.classgen.AsmClassGenerator.visitReturnStatement(AsmClassGenerator.java:616) at org.codehaus.groovy.ast.stmt.ReturnStatement.visit(ReturnStatement.java:49) 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:1078) at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:53) at org.codehaus.groovy.classgen.AsmClassGenerator.visitClass(AsmClassGenerator.java:233) ... 18 more 1 error
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