Stream updated after conditionaly halt its parent

[gaspoute]

Hello,

I encounter an unexpected behavior when I use Mithril streams, here is the JSFiddle. I expect that count equals zero when halt is true. I also try to replace the map with a combine but the result is the same.

I also write a test, that will become a pull request if it's really an issue or a misunderstanding.

Gaspar.

[dead-claudia]

I'd say that's definitely odd...

[dead-claudia]

I'd expect the same, since you're updating the entire stream. I'm not familiar with its implementation personally (I'd defer to @lhorie and @tivac for that), though.

[pygy]

It looks weird to me as well, but I'm not very familiar with the stream code either...

[gaspoute]

A little trick to get around this bug is to update without using the dependent stream returned by the mapping.

var halt = true;
var child = stream('c');
parent.map(function(p) {
    child(halt ? stream.HALT : p);
});