public Register getRegister(String name, boolean required) {
		Register register = trace.getBaseLanguage().getRegister(name);
		if (required && register == null) {
			throw new InvalidRegisterError(name);
		}
		return register;
	}
Clamp to only the valid addresses, but do at least warn.
Ghidra/Debug/Debugger-rmi-trace/src/main/java/ghidra/app/plugin/core/debug/service/tracermi/OpenTrace.java