Re: [Vala] Bug: badly crafted closures in delegates with default values

[Javier Casas Velasco <javier cv proximasystems net>]

Sorry, something broke along the way.

Here is (i hope) in plaintext:

Good morning everyone.
I have found a bug in Vala.
If you declare a delegate with a default value, the closure for that 
default value is broken. See this code:



class Test_delegates : Object {
    public delegate string delegateType1(string param);


    public delegateType1 mydelegate=defaultfun; //This default 
initialization is badly made. The closure does not include the current 
instance of Test_delegates

    public Test_delegates(){
        //mydelegate = defaultfun; //This initialization works. 
Uncomment to see it working.
    }

    public string defaultfun(string param){
        stdout.printf("defaultfun received %s\n", param);
        string retorno = "### %s ###".printf(param);
        stdout.printf("defaultfun returns %s\n", retorno);
        return retorno;
    }

    public string otherfun(string param){
        stdout.printf("otherfun received %s\n", param);
        string retorno = "@@@ %s @@@".printf(param);
        stdout.printf("otherfun returns %s\n", retorno);
        return retorno;
    }

    public void run(){
        string result = mydelegate("blebleble");
        stderr.flush();
        stdout.printf("mydelegate returned %s\n", result);
        mydelegate=otherfun;
        result = mydelegate("blebleble");
        stdout.printf("mydelegate returned %s\n", result);
    }
}


void main(){
    var t1=new Test_delegates();
    t1.run();
}



Shows:
** (process:8090): CRITICAL **: test_delegates_defaultfun: assertion 
`self != NULL' failed

Tested with Vala 0.17.5.

Best regards,
Javier