java.io.IOException

invalid constant type: 18" Solutions Tried: Googled threads for issue on with powermock - mockito & java-8 Excluded java assist from powermock and added java assist 3.19.0-GA Tried different versions of powermock (1.5.4, 1.6.2...) Below is the exception stack trace: java.lang.IllegalStateException: Failed to transform class with name com.StaticClass. Reason: java.io.IOException: invalid constant type: 18

Samebug tips1

If you're using multiple frameworks on your project, check if this is not a problem between mismatched versions of javassist between them.


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    • java.io.IOException: invalid constant type: 18" Solutions Tried: Googled threads for issue on with powermock - mockito & java-8 Excluded java assist from powermock and added java assist 3.19.0-GA Tried different versions of powermock (1.5.4, 1.6.2...) Below is the exception stack trace: java.lang.IllegalStateException: Failed to transform class with name com.StaticClass. Reason: java.io.IOException: invalid constant type: 18 at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:266) at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:180) at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:68) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:340) at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.createDelegatorFromClassloader(JUnit4TestSuiteChunkerImpl.java:145) at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.createDelegatorFromClassloader(JUnit4TestSuiteChunkerImpl.java:40) at org.powermock.tests.utils.impl.AbstractTestSuiteChunkerImpl.createTestDelegators(AbstractTestSuiteChunkerImpl.java:244) at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.<init>(JUnit4TestSuiteChunkerImpl.java:61) at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.<init>(AbstractCommonPowerMockRunner.java:32) at org.powermock.modules.junit4.PowerMockRunner.<init>(PowerMockRunner.java:34) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:408) at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104) at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86) at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59) at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26) at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59) at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:67) Caused by: java.lang.RuntimeException: java.io.IOException: invalid constant type: 18 at javassist.CtClassType.getClassFile2(CtClassType.java:203) at javassist.compiler.MemberResolver.lookupMethod(MemberResolver.java:110) at javassist.compiler.MemberResolver.lookupMethod(MemberResolver.java:96) at javassist.compiler.TypeChecker.atMethodCallCore(TypeChecker.java:704) at javassist.expr.NewExpr$ProceedForNew.setReturnType(NewExpr.java:243) at javassist.compiler.JvstTypeChecker.atCallExpr(JvstTypeChecker.java:146) at javassist.compiler.ast.CallExpr.accept(CallExpr.java:45) at javassist.compiler.TypeChecker.atVariableAssign(TypeChecker.java:248) at javassist.compiler.TypeChecker.atAssignExpr(TypeChecker.java:217) at javassist.compiler.ast.AssignExpr.accept(AssignExpr.java:38) at javassist.compiler.CodeGen.doTypeCheck(CodeGen.java:241) at javassist.compiler.CodeGen.atStmnt(CodeGen.java:329) at javassist.compiler.ast.Stmnt.accept(Stmnt.java:49) at javassist.compiler.CodeGen.atStmnt(CodeGen.java:350) at javassist.compiler.ast.Stmnt.accept(Stmnt.java:49) at javassist.compiler.CodeGen.atIfStmnt(CodeGen.java:404) at javassist.compiler.CodeGen.atStmnt(CodeGen.java:354) at javassist.compiler.ast.Stmnt.accept(Stmnt.java:49) at javassist.compiler.Javac.compileStmnt(Javac.java:568) at javassist.expr.NewExpr.replace(NewExpr.java:206) at org.powermock.core.transformers.impl.MainMockTransformer$PowerMockExpressionEditor.edit(MainMockTransformer.java:418) at javassist.expr.ExprEditor.loopBody(ExprEditor.java:211) at javassist.expr.ExprEditor.doit(ExprEditor.java:90) at javassist.CtClassType.instrument(CtClassType.java:1374) at org.powermock.core.transformers.impl.MainMockTransformer.transform(MainMockTransformer.java:74) at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:251) ... 23 more Caused by: java.io.IOException: invalid constant type: 18 at javassist.bytecode.ConstPool.readOne(ConstPool.java:1090) at javassist.bytecode.ConstPool.read(ConstPool.java:1033) at javassist.bytecode.ConstPool.<init>(ConstPool.java:149) at javassist.bytecode.ClassFile.read(ClassFile.java:737) at javassist.bytecode.ClassFile.<init>(ClassFile.java:108) at javassist.CtClassType.getClassFile2(CtClassType.java:190) ... 49 more

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