Exception when running PortletTagTest under java 8

Dev Notes:

When creating pull requests, be sure to specify java8 branch as the target into which to merge the code

The initializationError test in the PortletTagTest class throws an exception when run under Java 8.

<error message="Failed to transform class with name org.openmrs.module.ModuleFactory. Reason: java.io.IOException: invalid constant type: 18" type="java.lang.IllegalStateException">java.lang.IllegalStateException: Failed to transform class with name org.openmrs.module.ModuleFactory. Reason: java.io.IOException: invalid constant type: 18
at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:219)
at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:147)
at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:67)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:340)
at sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(CoreReflectionFactory.java:114)
at sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:125)
at sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:49)
at sun.reflect.annotation.AnnotationParser.parseSig(AnnotationParser.java:439)
at sun.reflect.annotation.AnnotationParser.parseClassValue(AnnotationParser.java:420)
at sun.reflect.annotation.AnnotationParser.parseClassArray(AnnotationParser.java:724)
at sun.reflect.annotation.AnnotationParser.parseArray(AnnotationParser.java:531)
at sun.reflect.annotation.AnnotationParser.parseMemberValue(AnnotationParser.java:355)
at sun.reflect.annotation.AnnotationParser.parseAnnotation2(AnnotationParser.java:286)
at sun.reflect.annotation.AnnotationParser.parseAnnotations2(AnnotationParser.java:120)
at sun.reflect.annotation.AnnotationParser.parseAnnotations(AnnotationParser.java:72)
at java.lang.Class.createAnnotationData(Class.java:3508)
at java.lang.Class.annotationData(Class.java:3497)
at java.lang.Class.getAnnotation(Class.java:3402)
at org.junit.internal.MethodSorter.getDeclaredMethods(MethodSorter.java:52)
at org.junit.internal.runners.TestClass.getAnnotatedMethods(TestClass.java:45)
at org.junit.internal.runners.MethodValidator.validateTestMethods(MethodValidator.java:71)
at org.junit.internal.runners.MethodValidator.validateStaticMethods(MethodValidator.java:44)
at org.junit.internal.runners.MethodValidator.validateMethodsForDefaultRunner(MethodValidator.java:50)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.validate(PowerMockJUnit44RunnerDelegateImpl.java:110)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.<init>(PowerMockJUnit44RunnerDelegateImpl.java:72)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit49RunnerDelegateImpl.<init>(PowerMockJUnit49RunnerDelegateImpl.java:29)
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.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.createDelegatorFromClassloader(JUnit4TestSuiteChunkerImpl.java:143)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.createDelegatorFromClassloader(JUnit4TestSuiteChunkerImpl.java:39)
at org.powermock.tests.utils.impl.AbstractTestSuiteChunkerImpl.createTestDelegators(AbstractTestSuiteChunkerImpl.java:217)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.<init>(JUnit4TestSuiteChunkerImpl.java:59)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.<init>(AbstractCommonPowerMockRunner.java:32)
at org.powermock.modules.junit4.PowerMockRunner.<init>(PowerMockRunner.java:33)
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:29)
at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:21)
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:26)
at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:51)
at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:115)
at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:102)
at org.apache.maven.surefire.Surefire.run(Surefire.java:180)
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:483)
at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:350)
at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:1021)
Caused by: java.lang.RuntimeException: java.io.IOException: invalid constant type: 18
at javassist.CtClassType.getClassFile2(CtClassType.java:203)
at javassist.CtClassType.subtypeOf(CtClassType.java:303)
at javassist.CtClassType.subtypeOf(CtClassType.java:318)
at javassist.compiler.MemberResolver.compareSignature(MemberResolver.java:247)
at javassist.compiler.MemberResolver.lookupMethod(MemberResolver.java:119)
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:445)
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:75)
at org.powermock.core.classloader.MockClassLoader.loadMockClass(MockClassLoader.java:215)
... 57 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)
... 85 more
</error>