java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at org.eclipse.jdt.core.tests.model.TypeHierarchyTests.testGetType(TypeHierarchyTests.java:554)
at org.eclipse.jdt.core.tests.model.SuiteOfTestCases$Suite.runTest(SuiteOfTestCases.java:99)
at org.eclipse.jdt.core.tests.model.SuiteOfTestCases$Suite.superRun(SuiteOfTestCases.java:83)
at org.eclipse.jdt.core.tests.model.SuiteOfTestCases$1.protect(SuiteOfTestCases.java:71)
at org.eclipse.jdt.core.tests.model.SuiteOfTestCases$Suite.run(SuiteOfTestCases.java:80)
at org.eclipse.test.EclipseTestRunner.run(EclipseTestRunner.java:330)
at org.eclipse.test.EclipseTestRunner.run(EclipseTestRunner.java:204)
at org.eclipse.test.CoreTestApplication.runTests(CoreTestApplication.java:35)
at org.eclipse.test.CoreTestApplication.run(CoreTestApplication.java:31)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:396)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336)
at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
at org.eclipse.core.launcher.Main.run(Main.java:977)
at org.apache.harmony.vm.JarRunner.main(JarRunner.java:80)

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