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https://issues.apache.org/jira/browse/GROOVY-8881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Paul King reassigned GROOVY-8881:
---------------------------------
Assignee: Paul King
> Inner class - qualified "this" reference cast exception inside 2 closures
> -------------------------------------------------------------------------
>
> Key: GROOVY-8881
> URL: https://issues.apache.org/jira/browse/GROOVY-8881
> Project: Groovy
> Issue Type: Bug
> Components: Compiler, groovy-runtime
> Reporter: Anton Pryamostanov
> Assignee: Paul King
> Priority: Major
>
> Let's consider the below example of qualified (Outer class) "this" reference
> from within the Inner class, used inside a closure defined inside another
> closure (2 layers of closures):
> {code:java}
> class OuterClass implements Runnable {
> class InnerClass {
> String bar() {
> Closure closureOne = {
> Closure closureTwo = {
> OuterClass outerClassViaQualifiedThisReference =
> OuterClass.this
> return outerClassViaQualifiedThisReference
> }
> return closureTwo.call()
> }
> closureOne.call()
> }
> }
> String toString() {
> return "OuterClass"
> }
> void run() {
> System.out.println(new InnerClass().bar())
> }
> }
> {code}
> It produces the below runtime exception:
> {code}
> java.lang.ClassCastException: OuterClass$InnerClass cannot be cast to
> OuterClass$InnerClass$_bar_closure1
> at
> OuterClass$InnerClass$_bar_closure1$_closure2.doCall(ConsoleScript279:8)
> at
> OuterClass$InnerClass$_bar_closure1$_closure2.doCall(ConsoleScript279)
> at OuterClass$InnerClass$_bar_closure1.doCall(ConsoleScript279:11)
> at OuterClass$InnerClass$_bar_closure1.doCall(ConsoleScript279)
> at OuterClass$InnerClass.bar(ConsoleScript279:13)
> at OuterClass$InnerClass$bar.call(Unknown Source)
> at OuterClass.run(ConsoleScript279:23)
> {code}
> However the below code runs fine (if only 1 closure is used):
> {code:groovy}
> class OuterClass implements Runnable {
> class InnerClass {
> String bar() {
> Closure closureOne = {
> //Closure closureTwo = {
> OuterClass outerClassViaQualifiedThisReference =
> OuterClass.this
> return outerClassViaQualifiedThisReference
> //}
> //return closureTwo.call()
> }
> closureOne.call()
> }
> }
> String toString() {
> return "OuterClass"
> }
> void run() {
> System.out.println(new InnerClass().bar())
> }
> }
> {code}
> *Expected result*:
> Code should run in both cases without runtime exceptions and should output
> "OuterClass".
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