> On 21 May 2015, at 2:41 pm, Quincey Morris > <quinceymor...@rivergatesoftware.com> wrote: > > It looks to me like the problem is that the NSWindowController’s “document” > property is still set to the NSDocument object that was just deallocated. I'm > surprised to see that the “document” property is ‘assign’ rather than > ‘strong’ (guess I never had a reason to look before).
I presume because the document owns its window controllers this must be weak to avoid a retain cycle. > I don’t know if something in the NSDocument or NSWindowController machinery > is supposed to set “document” back to nil when the document closes, or when, > but apparently the fonts panel is causing traversal of the action event queue > in a timing window before that’s occurred. It then crashes because the window > controller is trying to make the (non-existent) document look like it’s in > the responder chain. This is a stale pointer problem, not an overrelease > problem, AFAICT. Right. Forgive my sluggishness but I (eventually) arrived at this conclusion as well. > You might be able to work around it by forcibly setting “document” to nil in > the window controller (say) when the window is closing, though I don’t know > what else that might interfere with. I have tried that, but the problem persists. That makes me wonder whether the window here is NOT the document’s main window, but the Save Panel? Maybe a sandboxed save panel (being the bizarre object it is) keeps a reference to the document it was attached to, and that is what is stale? Is there a way to reveal the address/identity of a given object in Instruments? I see the NSWindow method in the stack trace, but it doesn’t tell me which window. —Graham _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
