Bug 62503 Classloader problem with older versions of JUnit [JUnit]
I have a project with a version 3.6 junit.jar on the classpath. In 3.0M8 when I run a test with an assertEquals() that fails, I get this error: java.lang.NoClassDefFoundError: junit/framework/ComparisonFailure at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.addFailure(RemoteTestRunner.java:533) at junit.framework.TestResult.addFailure(TestResult.java:46) at junit.framework.TestResult.runProtected(TestResult.java:127) at junit.framework.TestResult.run(TestResult.java:109) at junit.framework.TestCase.run(TestCase.java:131) at junit.framework.TestSuite.runTest(TestSuite.java:173) at junit.framework.TestSuite.run(TestSuite.java:168) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:410) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:294) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:182) Exception in thread "main" This used to work with Eclipse 2.1 (which also had JUnit 3.8.1 built in), and it disappears when I upgrade my copy of junit.jar to 3.8.1 to match the Eclipse one.
org.eclipse.jdt.junit.runtime/src/org/eclipse/jdt/internal/junit/runner/RemoteTestRunner.java
rerunTest(Integer.parseInt(fRerunTest), fTestClassNames[0], fTestName);
			return;
		}
		fTestResult= new TestResult();
		fTestResult.addListener(this);
		runTests(fTestClassNames, fTestName);
		fTestResult.removeListener(this);
		
		if (fTestResult != null) {
			fTestResult.stop();
			fTestResult= null;
		}
		if (fKeepAlive)
			waitForReruns();
			
		shutDown();
		
	}
	/**
	 * Waits for rerun requests until an explicit stop request
	 */
	private synchronized void waitForReruns() {
		while (!fStopped) {
			try {
				wait();
				if (!fStopped && fRerunRequests.size() > 0) {
					RerunRequest r= (RerunRequest)fRerunRequests.remove(0);
					rerunTest(r.fRerunTestId, r.fRerunClassName, r.fRerunTestName);
				}
			} catch (InterruptedException e) {