[GROOVY-5367] Closure property in Binding used as Closure delegate cannot be called

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.6
• Fix Version/s: 4.0.0-beta-1, 3.0.10
• Component/s: groovy-runtime
• Assignee: Unassigned
• Reporter: Wujek
• Created: 15/Mar/12 15:03
• Updated: 29/Jan/22 18:39
• Resolved: 27/May/21 22:40

Description

In a script, this works:

c =

{ println 'works' }

c()

whereas this one doesn't:

def bind = new Binding(c:

{ println 'does not work' }

)
def t =

{ c() }

t.delegate = bind
t()

They both define a 'c' property in the binding which happens to be a closure. In the first case, the closure get's called as Groovy apparently tries to get the binding property and invoke it if it's a closure; in the latter, the delegate of the closure is a binding with a property 'c' that is a closure, but c() still doesn't work.

I debugged this and there is actually an if in MetaClassImpl that checks if the 'this' object is a Script, and if so, a property with the name is retrieved and a call() method is called. (MetaClassImpl#invokePropertyOrMissing:1089 in Groovy 1.8.6-all from maven central).