Exception thrown in ExtendedMessageFormat using quotes with custom registry

public static void main(String[] args)
{
	String pattern           = "TEST: {0,choice,0#0|0<'1'}";
	String patternWorkaround = "TEST: {0,choice,0#0|0<'1' }"; // a space after quote

	// Works fine
	MessageFormat format0 = new MessageFormat(pattern);

	System.out.println(format0.format(new Integer[] { 0 })); // "TEST: 0"
	System.out.println(format0.format(new Integer[] { 1 })); // "TEST: 1"

	// Works fine
	ExtendedMessageFormat format1 = new ExtendedMessageFormat(pattern);

	System.out.println(format1.format(new Integer[] { 0 })); // "TEST: 0"
	System.out.println(format1.format(new Integer[] { 1 })); // "TEST: 1"

	// Works fine
	ExtendedMessageFormat format2 = new ExtendedMessageFormat(patternWorkaround, new HashMap<String, FormatFactory>());

	System.out.println(format2.format(new Integer[] { 0 })); // "TEST: 0"
	System.out.println(format2.format(new Integer[] { 1 })); // "TEST: 1 "

	// Doesn't work
	ExtendedMessageFormat format3 = new ExtendedMessageFormat(pattern, new HashMap<String, FormatFactory>());

	System.out.println(format3.format(new Integer[] { 0 })); // Exception in thread "main" java.lang.IllegalArgumentException: Unterminated format element at position 9
	System.out.println(format3.format(new Integer[] { 1 }));
}