[GROOVY-3948] Replacing method on ExpandoMetaClass doesn't work

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.6.7
• Fix Version/s: 2.2.0
• Component/s: groovy-runtime
• Environment: Groovy Shell (1.6.7, JVM: 1.5.0_20)
• Assignee: Unassigned
• Reporter: Lajos Papp
• Created: 19/Dec/09 19:04
• Updated: 02/May/17 02:03
• Resolved: 03/Apr/16 19:52

Description

Expando.metaClass.foo={-> def directBar=delegate.bar()
    println "directBar=${directBar}"    
    def invokedBar=delegate.invokeMethod('bar',null)
    println "invokedBar=$invokedBar"
}

e=new Expando()
e.metaClass.bar={->1}
e.foo()
//directBar=1
//invokedBar=1

e.metaClass.bar={->2}
e.foo()
//directBar=1
//invokedBar=2

for some reason delegate.bar() != delegate.invokeMethod('bar',null)
looks like at the direct call the closure got cached ...

if the previous example continues with:

x=new Expando()
x.metaClass.bar={->3}
e.foo()
//directBar=2
//invokedBar=2

creating the new 'x' object has side effect on the 'e' objects metaclass?