[GROOVY-5294] This reference is null during construction of object of abstract class implemented as closure map

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.8.6
• Fix Version/s: 2.0-beta-3
• Assignee: Cédric Champeau
• Reporter: Alexander Monakhov
• Created: 10/Feb/12 05:39
• Updated: 13/May/12 03:30
• Resolved: 16/Feb/12 08:02

Description

The following code produces NPE when the second object is created:

abstract class C {
    public abstract String f(Object o);

    private void g(Object val) { 
        println f(val) // NPE when 'y' is created !!!
    }

    public C() {this('DEF')}

    public C(Object val) { g(val) }
}

class D extends C {
    public String f(Object o) { return o ? 'Not null' : 'Is null' }
}

def x = new D()

def y = [ 'f' : { it -> return '123' + it } ] as C

Somehow 'this' becomes null when 'f' is invoked in 'g'.