1148539 - js generator loaded from js code module and looping over it has stopped working

Status: RESOLVED INCOMPLETE

(Core :: JavaScript Engine, defect)

Description

[Atte Kemppilä [:atte]]

Attachment: example extension

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:36.0) Gecko/20100101 Firefox/36.0 Iceweasel/36.0
Build ID: 20150226093115

Steps to reproduce:

Attached example extension adds "test1" and "test2" to context menu. They both run the same code, but only test2 prints correct result: "result:1,2,3". 

test1 generator is loaded from js code module and test2 generator is in the same scope.

Both work for me in ff36, but not in ff37 or nightly.

Comment 1

[Atte Kemppilä [:atte]]

sfink provided also this test case in #jsapi:

    code = `
    function Iterator1()
    {
        var list = [1, 2, 3];
        for (var i = 0; i < list.length; i++)
            yield list[i];
    }
    `;
     
    g = newGlobal();
    g.eval(code);
    eval(code);
     
    print([x for each (x in Iterator1())]);
    print([x for each (x in g.Iterator1())]);

Comment 2

[Steve Fink [:sfink] [:s:]]

It looks to me like a problem with cross-compartment |for each|. Using 'of' works, btw:

  print([x for (x of g.Iterator1())]);

Comment 3

[Matthew Gaudet (he/him) [:mgaudet]]

Incomplete: use of non-standard generators.