Local variable shadows method in closure call, even if method is called with this keyword.

class DelegationTest extends GroovyTestCase {
    void testSimilarNamesForMethodAndLocalWithLocalAsMethodArgument() {
        new Executer().failingExecute()
    }
    void testSimilarNamesForMethodAndLocalWithNoArgMethod() {
        new Executer().workingExecute()
    }
}

class Executer {
    void convention(String arg) {
         println 'called'
    }

    void convention() {
         println 'called'
    }

    void failingExecute() {
        def convention= 'value'
        10.times {
            this.convention(convention)
        }
    }
    void workingExecute() {
        def convention= 'value'
        10.times {
            this.convention()
        }
    }
}