[Bug]: Bug adding comment in AST of lambda

[yijiangtian]

Describe the bug

An IndexOutBoundException occurs when a lambda has no arguments.

Bug position: JDTCommentBuilder.java:461

@Override
public <T> void visitCtLambda(CtLambda<T> e) {
	if (e.getExpression() != null) {
		CtParameter<?> lastParameter = e.getParameters().get(e.getParameters().size() - 1);   //  IndexOutBoundException 
		if (comment.getPosition().getSourceStart() > lastParameter.getPosition().getSourceEnd()) {
			e.getExpression().addComment(comment);
		} else {
			e.addComment(comment);
		}
	} else if (e.getBody() != null) {
		e.addComment(comment);
	}
}

Source code you are trying to analyze/transform

No response

Source code for your Spoon processing

   public static void main(String[] args) {
        Thread t = new Thread(() -> /* comments here */ System.out.println("Thread " + Thread.currentThread().getId() + " is running"));
        t.start();
    }

Actual output

No response

Expected output

No response

Spoon Version

10.4.2

JVM Version

11

What operating system are you using?

win10

[SirYwell]

Do you have example code that triggers this bug?

[yijiangtian]

Added example code