Checks that Debugger.setVariableValue cannot overwrite synthetic class context slots
Class block scope found: true
Setting .brand to "foo"
{
    error : {
        code : -32603
        message : Internal error
    }
    id : <messageId>
}
Own property names of inst:
{
    id : <messageId>
    result : {
        result : {
            type : string
            value : []
        }
    }
}
inst.run():
{
    id : <messageId>
    result : {
        result : {
            description : 42
            type : number
            value : 42
        }
    }
}