I've found what looks like a memory leak in Async.SendXMLHttpRequest. Here's
the trail I'm following:
req (1st param to SendXMLHttyRequest) is an instance of whatever object is
supplying XMLHttpRequest functionality
d (local var to SendXMLHttyRequest) is set to
Base.partial(Async._xhr_canceller,
req)
So we have
req
and
d = anonfunc1
.im_func = Async._xhr_canceller
anonfunc1.im_preargs[0] = req;
Finally, req.onreadystatechange is set to
Base.bind(Async._xhr_onreadystatechange,
req, d) giving us:
req.onreadystatechange = anonfunc
req.onreadystatechange.im_func = Async._xhr_onreadystatechange
req.onreadystatechange.im_preargs[0] = d
req.onreadystatechange.im_self = req
The last value is where I believe the leak occurs, because that results in
this loop:
req.onreadystatechange.im_preargs[0].anonfunc.im_preargs[0] = req
When Async._xhr_canceller or Async._xhr_onreadystatechange are called, they
set req.onreadystatechange to null. Leaving this:
anonfunc
However, I cannot find anywhere that this loop is broken if the request
succeeds. The leak detector extension (
http://dbaron.org/mozilla/leak-monitor/) seems to back this up as I get 1
reported leak for every XMLHttpRequest I make.
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