[GROOVY-11480] Cast exception when using qualified this in lambda

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.0.0-alpha-11
• Component/s: Static compilation

Language

groovy

• Assignee: Eric Milles
• Reporter: Eric Milles
• Created: 18/Sep/24 13:52
• Updated: 12/Nov/24 11:38
• Resolved: 18/Sep/24 13:58

Description

Consider the following:

@groovy.transform.CompileStatic
class Test1 {
    class Test2 {
        def m() {
            Optional.empty().orElseGet(() -> Test1.this.n)
        }
    }
    private n = 123
}

assert new Test1.Test2(new Test1()).m() == 123

The expression "Test1.this.n" is not detected as an instance member access. Thus the thisObject reference for the lambda class is set to Class<Test2> and this results in a cast exception at runtime.

java.lang.ClassCastException: class java.lang.Class cannot be cast to class Test1$Test2 (java.lang.Class is in module java.base of loader 'bootstrap'; Test1$Test2 is in unnamed module of loader groovy.lang.GroovyClassLoader$InnerLoader @7ec68821)
        at Test1$Test2$_m_lambda1.doCall(TestScript85.groovy:5)
        at java.base/java.util.Optional.orElseGet(Optional.java:364)
        at Test1$Test2.m(TestScript85.groovy:5)