Details
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Bug
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Status: Closed
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Minor
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Resolution: Fixed
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2.5.14, 3.0.8
Description
Under static compilation, using a void expression as the condition (or part of the condition) of a while statement causes the compiler to throw exceptions.
This code:
package example import groovy.transform.CompileStatic @CompileStatic class WhileVoid { void isSo() { null } void myBuggyConstruct() { while(isSo()) { null } } }
results in this exception from the compiler:
startup failed: General error during instruction selection: ASM reporting processing error for example.WhileVoid#myBuggyConstruct with signature void myBuggyConstruct() in WhileVoid.groovy:11. /Users/jasongarrett/scratch/scratch/src/main/groovy/example/WhileVoid.groovy groovy.lang.GroovyRuntimeException: ASM reporting processing error for example.WhileVoid#myBuggyConstruct with signature void myBuggyConstruct() in WhileVoid.groovy:11. /Users/jasongarrett/scratch/scratch/src/main/groovy/example/WhileVoid.groovy at org.codehaus.groovy.classgen.AsmClassGenerator.visitConstructorOrMethod(AsmClassGenerator.java:432) at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitMethod(ClassCodeVisitorSupport.java:106) at org.codehaus.groovy.classgen.AsmClassGenerator.visitMethod(AsmClassGenerator.java:557) at org.codehaus.groovy.ast.ClassNode.visitMethods(ClassNode.java:1094) at org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:1087) at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:52) at org.codehaus.groovy.classgen.AsmClassGenerator.visitClass(AsmClassGenerator.java:273) at org.codehaus.groovy.control.CompilationUnit$3.call(CompilationUnit.java:798) at org.codehaus.groovy.control.CompilationUnit$IPrimaryClassNodeOperation.doPhaseOperation(CompilationUnit.java:943) at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:672) at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:636) at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:611) at org.gradle.api.internal.tasks.compile.ApiGroovyCompiler.execute(ApiGroovyCompiler.java:277) at org.gradle.api.internal.tasks.compile.ApiGroovyCompiler.execute(ApiGroovyCompiler.java:67) at org.gradle.api.internal.tasks.compile.GroovyCompilerFactory$DaemonSideCompiler.execute(GroovyCompilerFactory.java:98) at org.gradle.api.internal.tasks.compile.GroovyCompilerFactory$DaemonSideCompiler.execute(GroovyCompilerFactory.java:77) at org.gradle.api.internal.tasks.compile.daemon.AbstractDaemonCompiler$CompilerWorkAction.execute(AbstractDaemonCompiler.java:135) at org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:63) at org.gradle.workers.internal.AbstractClassLoaderWorker$1.create(AbstractClassLoaderWorker.java:49) at org.gradle.workers.internal.AbstractClassLoaderWorker$1.create(AbstractClassLoaderWorker.java:43) at org.gradle.internal.classloader.ClassLoaderUtils.executeInClassloader(ClassLoaderUtils.java:97) at org.gradle.workers.internal.AbstractClassLoaderWorker.executeInClassLoader(AbstractClassLoaderWorker.java:43) at org.gradle.workers.internal.IsolatedClassloaderWorker.run(IsolatedClassloaderWorker.java:49) at org.gradle.workers.internal.IsolatedClassloaderWorker.run(IsolatedClassloaderWorker.java:30) at org.gradle.workers.internal.WorkerDaemonServer.run(WorkerDaemonServer.java:85) at org.gradle.workers.internal.WorkerDaemonServer.run(WorkerDaemonServer.java:55) at org.gradle.process.internal.worker.request.WorkerAction$1.call(WorkerAction.java:138) at org.gradle.process.internal.worker.child.WorkerLogEventListener.withWorkerLoggingProtocol(WorkerLogEventListener.java:41) at org.gradle.process.internal.worker.request.WorkerAction.run(WorkerAction.java:135) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24) at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182) at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164) at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:414) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56) at java.base/java.lang.Thread.run(Thread.java:834) Caused by: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at groovyjarjarasm.asm.Frame.merge(Frame.java:1268) at groovyjarjarasm.asm.Frame.merge(Frame.java:1233) at groovyjarjarasm.asm.MethodWriter.computeAllFrames(MethodWriter.java:1611) at groovyjarjarasm.asm.MethodWriter.visitMaxs(MethodWriter.java:1547) at org.codehaus.groovy.classgen.AsmClassGenerator.visitConstructorOrMethod(AsmClassGenerator.java:413) Caused by: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
This example, with a slightly more complex condition for the while loop:
package example import groovy.transform.CompileStatic @CompileStatic class WhileNotVoid { List list = [] void isSo() { null } void myBuggyConstruct() { while(!list.empty && !isSo()) { null } } }
results in a different compiler exception:
BUG! exception in phase 'class generation' in source unit '/Users/jasongarrett/scratch/scratch/src/main/groovy/example/WhileNotVoid.groovy' operand stack contains 2 elements, but we expected only 0