private void interruptTestThread(TestThread testThread) {
		testThread.interrupt();

		try {
			// give the test thread a chance to register any exceptions; if we don't wait, we 
			// may report exceptions before the test thread is given back control
			testThread.join(250);
		}
		catch (InterruptedException e) {
			// we tried
		}
	}
Prints all exceptions found that did not occur on the test thread.  This is useful 
for debugging.
Ghidra/Framework/Generic/src/main/java/generic/test/ConcurrentTestExceptionStatement.java