Test failures occur when building with Java 8

[brettwooldridge]

For example:

Tests run: 3, Failures: 0, Errors: 3, Skipped: 0, Time elapsed: 0.508 sec <<< FAILURE!
testAcquiringConnectionAfterRecoveryDoesNotMarkAsFailed(bitronix.tm.JdbcFailedPoolTest)  Time elapsed: 0.504 sec  <<< ERROR!
java.lang.ExceptionInInitializerError
    at bitronix.tm.resource.jdbc.JdbcPooledConnection.getConnectionHandle(JdbcPooledConnection.java:433)
    at bitronix.tm.resource.jdbc.JdbcPooledConnection.getConnectionHandle(JdbcPooledConnection.java:312)
    at bitronix.tm.resource.common.XAPool.getConnectionHandle(XAPool.java:189)
    at bitronix.tm.resource.jdbc.PoolingDataSource.startRecovery(PoolingDataSource.java:336)
    at bitronix.tm.recovery.IncrementalRecoverer.recover(IncrementalRecoverer.java:54)
    at bitronix.tm.JdbcFailedPoolTest.testAcquiringConnectionAfterRecoveryDoesNotMarkAsFailed(JdbcFailedPoolTest.java:56)
    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 junit.framework.TestCase.runTest(TestCase.java:168)
    at junit.framework.TestCase.runBare(TestCase.java:134)
    at junit.framework.TestResult$1.protect(TestResult.java:110)
    at junit.framework.TestResult.runProtected(TestResult.java:128)
    at junit.framework.TestResult.run(TestResult.java:113)
    at junit.framework.TestCase.run(TestCase.java:124)
    at junit.framework.TestSuite.runTest(TestSuite.java:243)
    at junit.framework.TestSuite.run(TestSuite.java:238)
    at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
    at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
    at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
    at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
    at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
    at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
    at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
    at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Caused by: bitronix.tm.internal.BitronixRuntimeException: error initializing JdbcProxyFactory
    at bitronix.tm.resource.jdbc.proxy.JdbcProxyFactory$Initializer.initialize(JdbcProxyFactory.java:82)
    at bitronix.tm.resource.jdbc.proxy.JdbcProxyFactory$Initializer.access$000(JdbcProxyFactory.java:60)
    at bitronix.tm.resource.jdbc.proxy.JdbcProxyFactory.<clinit>(JdbcProxyFactory.java:39)
    ... 31 more
Caused by: java.lang.RuntimeException: java.lang.RuntimeException: java.io.IOException: invalid constant type: 18
    at bitronix.tm.resource.jdbc.proxy.JdbcJavassistProxyFactory.createProxyCallableStatementClass(JdbcJavassistProxyFactory.java:183)
    at bitronix.tm.resource.jdbc.proxy.JdbcJavassistProxyFactory.<init>(JdbcJavassistProxyFactory.java:74)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
    at java.lang.Class.newInstance(Class.java:438)
    at bitronix.tm.resource.jdbc.proxy.JdbcProxyFactory$Initializer.initialize(JdbcProxyFactory.java:80)
    ... 33 more
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.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.compiler.TypeChecker.atCallExpr(TypeChecker.java:681)
    at javassist.compiler.JvstTypeChecker.atCallExpr(JvstTypeChecker.java:156)
    at javassist.compiler.ast.CallExpr.accept(CallExpr.java:45)
    at javassist.compiler.CodeGen.doTypeCheck(CodeGen.java:241)
    at javassist.compiler.CodeGen.compileExpr(CodeGen.java:228)
    at javassist.compiler.CodeGen.atReturnStmnt2(CodeGen.java:597)
    at javassist.compiler.JvstCodeGen.atReturnStmnt(JvstCodeGen.java:424)
    at javassist.compiler.CodeGen.atStmnt(CodeGen.java:362)
    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.atMethodBody(CodeGen.java:291)
    at javassist.compiler.Javac.compileBody(Javac.java:222)
    at javassist.CtBehavior.setBody(CtBehavior.java:401)
    at javassist.CtBehavior.setBody(CtBehavior.java:375)
    at bitronix.tm.resource.jdbc.proxy.JdbcJavassistProxyFactory.generateProxyClass(JdbcJavassistProxyFactory.java:260)
    at bitronix.tm.resource.jdbc.proxy.JdbcJavassistProxyFactory.createProxyCallableStatementClass(JdbcJavassistProxyFactory.java:180)
    ... 40 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)
    ... 64 more