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    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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via Stack Overflow by jakub.petr
, 1 year ago
java.io.IOException: invalid constant type: 18 at 14
via Google Groups by srinivas, 1 year ago
java.io.IOException: invalid constant type: 15
via ebasetech.com by Unknown author, 2 years ago
java.io.IOException: invalid constant type: 15
via pastebin.ca by Unknown author, 1 year ago
java.io.IOException: invalid constant type: 15
via pastebin.ca by Unknown author, 2 years ago
java.io.IOException: invalid constant type: 15
via GitHub by dcransac
, 2 years ago
java.io.IOException: invalid constant type: 18 at 14	at javassist.bytecode.ConstPool.readOne(ConstPool.java:1044)	at javassist.bytecode.ConstPool.read(ConstPool.java:984)	at javassist.bytecode.ConstPool.(ConstPool.java:125)	at javassist.bytecode.ClassFile.read(ClassFile.java:770)	at javassist.bytecode.ClassFile.(ClassFile.java:114)	at javassist.CtClassType.getClassFile2(CtClassType.java:191)	at javassist.CtClassType.getClassFile2(CtClassType.java:204)	at javassist.CtClassType.getModifiers(CtClassType.java:388)	at me.factorify.server.person.domain.PersonTest.testName(PersonTest.java:19)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)	at org.junit.runner.JUnitCore.run(JUnitCore.java:160)	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:74)	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:211)	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:67)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)