[jira] [Created] (GROOVY-7843) Trait method calling closure cannot be inherited while using CompileStatic

["Arnaud CAVAILHEZ (JIRA)" <ji...@apache.org>]

Arnaud CAVAILHEZ created GROOVY-7843:
----------------------------------------

             Summary: Trait method calling closure cannot be inherited while using CompileStatic
                 Key: GROOVY-7843
                 URL: https://issues.apache.org/jira/browse/GROOVY-7843
             Project: Groovy
          Issue Type: Bug
            Reporter: Arnaud CAVAILHEZ
            Priority: Minor


A trait extending another and calling itself more than 3 times:

```@CompileStatic
trait UpperTrait {
    void call(Closure body){
        body()
    }
}```

```@CompileStatic
trait LowerTrait extends UpperTrait {

    void threeCalls() {
        call {
            call {
                call {

                }
            }
        }
    }
}```

Will generate a `ClassCastException` when called:
```class ImplementsTrait implements LowerTrait {
}
new ImplementsTrait().threeCalls()
```

raises:

```Caught: java.lang.ClassCastException: LowerTrait$Trait$Helper$_threeCalls_closure1 cannot be cast to UpperTrait
java.lang.ClassCastException: LowerTrait$Trait$Helper$_threeCalls_closure1 cannot be cast to UpperTrait
	at LowerTrait$Trait$Helper$_threeCalls_closure1$_closure2.doCall(LowerTrait.groovy:9)
etc..```








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