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Cannot load configuration class: org.springframework.web.servlet.config.MvcDefaultServletHandlerTests$MvcDefaultServletHandlerFeature
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CGLIB is required to process @Configuration classes. Either add CGLIB to the classpath or remove the following @Configuration bean definitions: [appConfig]
java.lang.IllegalArgumentException: No visible constructors in class org.springframework.web.servlet.config.MvcDefaultServletHandlerTests$MvcDefaultServletHandlerFeature	at net.sf.cglib.proxy.Enhancer.filterConstructors(Enhancer.java:531)	at net.sf.cglib.proxy.Enhancer.generateClass(Enhancer.java:448)	at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)	at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)	at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:377)	at net.sf.cglib.proxy.Enhancer.createClass(Enhancer.java:317)	at org.springframework.context.annotation.ConfigurationClassEnhancer.createClass(ConfigurationClassEnhancer.java:127)	at org.springframework.context.annotation.ConfigurationClassEnhancer.enhance(ConfigurationClassEnhancer.java:97)	at org.springframework.context.annotation.ConfigurationClassPostProcessor.enhanceConfigurationClasses(ConfigurationClassPostProcessor.java:355)	at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigurationClasses(ConfigurationClassPostProcessor.java:197)	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:170)	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:604)	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:437)	at org.springframework.web.servlet.config.MvcDefaultServletHandlerTests.testDefaultServletHandler(MvcDefaultServletHandlerTests.java:40)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)	at org.junit.runners.ParentRunner.run(ParentRunner.java:236)	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)