5 tests failing when building with openjdk-9

[tdaitx]

When building 3.2.6 with openjdk-9 I had 5 test failures in total.

$ mvn -v  
Apache Maven 3.5.2
Maven home: /usr/share/maven
Java version: 9.0.1, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-9-openjdk-amd64
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "4.15.0-10-generic", arch: "amd64", family: "unix"

$ mvn test
<snip>
-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running net.sf.cglib.proxy.TestProxy
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by net.sf.cglib.core.ReflectUtils$1 (file:/home/tdaitx/cglib/cglib/target/classes/) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of net.sf.cglib.core.ReflectUtils$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
exception: net.sf.cglib.proxy.UndeclaredThrowableException: java.lang.Exception-->test!
<snip>
Tests run: 51, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.802 sec <<< FAILURE! - in net.sf.cglib.proxy.TestEnhancer
testSql(net.sf.cglib.proxy.TestEnhancer)  Time elapsed: 0.026 sec  <<< ERROR!
net.sf.cglib.core.CodeGenerationException: java.lang.reflect.InvocationTargetException-->null
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:498)
	at java.base/java.lang.ClassLoader.defineClass1(Native Method)
	at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1008)
	at java.base/jdk.internal.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at net.sf.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:459)
	at net.sf.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:336)
	at net.sf.cglib.proxy.Enhancer.generate(Enhancer.java:492)
	at net.sf.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:93)
	at net.sf.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:91)
	at net.sf.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at net.sf.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61)
	at net.sf.cglib.core.internal.LoadingCache.get(LoadingCache.java:34)
	at net.sf.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:116)
	at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:291)
	at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:480)
	at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:305)
	at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:867)
	at net.sf.cglib.proxy.TestEnhancer.testSql(TestEnhancer.java:819)
<snip>
Tests run: 12, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.036 sec <<< FAILURE! - in net.sf.cglib.reflect.TestFastClass
testPackagePrivateMethod_bootstrapClassLoader(net.sf.cglib.reflect.TestFastClass)  Time elapsed: 0.003 sec  <<< ERROR!
java.lang.NoSuchMethodException: java.lang.String.getChars([C, int)
	at java.base/java.lang.Class.getDeclaredMethod(Class.java:2435)
	at net.sf.cglib.reflect.TestFastClass.testPackagePrivateMethod_bootstrapClassLoader(TestFastClass.java:663)

<snip>
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.01 sec <<< FAILURE! - in net.sf.cglib.transform.impl.TestProvideFields
initializationError(net.sf.cglib.transform.impl.TestProvideFields)  Time elapsed: 0 sec  <<< ERROR!
java.lang.IllegalAccessError: Update to static final field net.sf.cglib.transform.AbstractTransformTest.CGLIB$FIELD_NAMES attempted from a different method (CGLIB$STATICHOOK73) than the initializer method <clinit> 
	at net.sf.cglib.transform.AbstractTransformTest.CGLIB$STATICHOOK73(AbstractTransformTest.java)
	at net.sf.cglib.transform.AbstractTransformTest.<clinit>(AbstractTransformTest.java)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:488)
	at junit.framework.TestSuite.createTest(TestSuite.java:65)
	at junit.framework.TestSuite.addTestMethod(TestSuite.java:307)
	at junit.framework.TestSuite.addTestsFromTestCase(TestSuite.java:150)
	at junit.framework.TestSuite.<init>(TestSuite.java:129)
	at net.sf.cglib.transform.impl.TestProvideFields.suite(TestProvideFields.java:69)

<snip>
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.008 sec <<< FAILURE! - in net.sf.cglib.transform.impl.TestDemo
test(net.sf.cglib.transform.impl.TestDemo)  Time elapsed: 0.008 sec  <<< ERROR!
java.lang.IllegalAccessError: Update to static final field net.sf.cglib.transform.impl.TransformDemo.CGLIB$FIELD_NAMES attempted from a different method (CGLIB$STATICHOOK80) than the initializer method <clinit> 
	at net.sf.cglib.transform.impl.TransformDemo.CGLIB$STATICHOOK80(TransformDemo.java)
	at net.sf.cglib.transform.impl.TransformDemo.<clinit>(TransformDemo.java)
	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:564)
	at net.sf.cglib.transform.impl.TransformDemo.main(TransformDemo.java:114)
	at net.sf.cglib.transform.impl.TestDemo.test(TestDemo.java:19)

<snip>
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.015 sec <<< FAILURE! - in net.sf.cglib.TestAll
initializationError(net.sf.cglib.TestAll)  Time elapsed: 0.001 sec  <<< ERROR!
java.lang.IllegalAccessError: Update to static final field net.sf.cglib.transform.AbstractTransformTest.CGLIB$FIELD_NAMES attempted from a different method (CGLIB$STATICHOOK108) than the initializer method <clinit> 
	at net.sf.cglib.transform.AbstractTransformTest.CGLIB$STATICHOOK108(AbstractTransformTest.java)
	at net.sf.cglib.transform.AbstractTransformTest.<clinit>(AbstractTransformTest.java)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:488)
	at junit.framework.TestSuite.createTest(TestSuite.java:65)
	at junit.framework.TestSuite.addTestMethod(TestSuite.java:307)
	at junit.framework.TestSuite.addTestsFromTestCase(TestSuite.java:150)
	at junit.framework.TestSuite.<init>(TestSuite.java:129)
	at net.sf.cglib.transform.impl.TestProvideFields.suite(TestProvideFields.java:69)
	at net.sf.cglib.TestAll.suite(TestAll.java:81)


Results :

Tests in error: 
  TestEnhancer.testSql:819 » CodeGeneration java.lang.reflect.InvocationTargetEx...
  TestFastClass.testPackagePrivateMethod_bootstrapClassLoader:663 » NoSuchMethod
  TestProvideFields.suite:69->AbstractTransformTest.<clinit>:-1->AbstractTransformTest.CGLIB$STATICHOOK73:-1 » IllegalAccess
  TestDemo.test:19 » IllegalAccess Update to static final field net.sf.cglib.tra...
  TestAll.suite:81 » IllegalAccess Update to static final field net.sf.cglib.tra...

Tests run: 156, Failures: 0, Errors: 5, Skipped: 0

Let me know if I should report them individually or if you need me to provide additional information.