[GROOVY-8762] Invalid this reference in nested class

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.15, 2.5.1
• Fix Version/s: 3.0.0-rc-3, 2.5.19
• Assignee: Eric Milles
• Reporter: paolo di tommaso
• Created: 21/Aug/18 18:48
• Updated: 24/Aug/22 17:40
• Resolved: 25/Nov/19 23:28

Description

The following snippet throws an exception when trying to initialise the `y` attribute

class Foo {

    static class Bar extends Closure {

        private int x

        private int y

        Bar(int a) {
            super(null, null);
            x = a
            this.y = a 
        }
        
        public int getMaximumNumberOfParameters() {
            throw new UnsupportedOperationException()
        }

        public Class[] getParameterTypes() {
            throw new UnsupportedOperationException()
        }

        public Object call(final Object... args) {
            throw new UnsupportedOperationException()
        }

        public Object call(final Object arguments) {
            throw new UnsupportedOperationException()
        }

        public Object call() {
            throw new UnsupportedOperationException()
        }
    }

    def doSomething() {
        new Bar(1)
    }
}


assert new Foo().doSomething() 

Reported error:

java.lang.NullPointerException
	at Foo$Bar.<init>(ConsoleScript8:12)
	at Foo.doSomething(ConsoleScript8:37)
	at Foo$doSomething.call(Unknown Source)
	at ConsoleScript8.run(ConsoleScript8:42)