[GROOVY-10239] GroovyCastException when @CompileStatic and !in keyword are used together

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.9
• Fix Version/s: 4.0.0-beta-2, 3.0.10
• Component/s: Static compilation
• Environment: macOs Big Sur 11.5.2 ; 2,6 GHz 6-Core Intel Core i7 ; Java 11.0.11/16.0.1 (probably reproducible in other version)

Language

groovy

• Assignee: Eric Milles
• Reporter: Rodolfo Yanke
• Created: 16/Sep/21 23:56
• Updated: 03/Feb/22 22:32
• Resolved: 17/Sep/21 17:35

Description

Dear colleagues,

I've recently updated my projects from 3.0.8 to 3.0.9 and I started getting some GroovyCastExceptions when trying to use !in keyword along with CompileStatic annotation:

org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object 'true' with class 'java.lang.Boolean' to class 'Xyz'

We realised that it only works on 3.0.9 if we remove the CompileStatic annotation(3.0.8 works with and without).

Here's an example of how to reproduce the exception:

import groovy.transform.CompileStatic

/**
 *  REMOVE @CompileStatic and the main method runs fine for both versions 3.0.8 and 3.0.9.
 * 'Cannot cast object \'true\' with class \'java.lang.Boolean\' to class \'MyEnum\''
 *  @CompileStatic only works with 3.0.8
 */
@CompileStatic
class Groovy309Error {
    static void main(String[] args) {
        def myObj = new MyObj(status: MyEnum.A)
        List<MyObj> items = [myObj]
        def newItems = items.findAll { it.status !in [MyEnum.B] }
        println newItems
    }
}

enum MyEnum {
    A, B
}

class MyObj {
    MyEnum status
}

 
Please, forgive me if I missed something on the bug checklist but I think this ticket belongs here.
Thank you in advance 

Issue Links

• fixes: GROOVY-10318 Weird behavior of !in operator