bug#23462: 25.0.93; Crash on OS X when suspending main frame

[Anders Lindgren <andlind@gmail.com>]

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Hi!

Thanks for the trace output.

As far as I can tell, I don't see a better location to place the test. (I
have to include myself in the group who have no idea why drawRect is being
called when the frame is miniatured.) I would suggest that we add it as you
originally suggested.

Alan, what do you say? Have you looked into this?

    -- Anders


On Tue, May 10, 2016 at 10:13 PM, Ivan Cibrario Bertolotti <
ivan.cibrario@polito.it> wrote:

> Hi Anders,
>
> > On 10 May 2016, at 20:56, Anders Lindgren <andlind@gmail.com> wrote:
> >
> > Hi Ivan and Alan!
> >
> > I'm not sure that is the correct place for the patch.
> >
> > Could you enable NSTRACE (by uncommenting the line defining
> NSTRACE_ENABLED in nsterm.h) and see which function calls `drawRect` (if
> possible). If that is in a function that is part of Emacs, it's better to
> check that the frame is visible higher up in the call chain.
> >
> > You will have to start Emacs from a terminal window in order to see the
> trace output. You can do this by running
> "./nextstep/Emacs.app/Content/MacOS/Emacs”.
>
> here is the relevant part of the trace output:
>
> nsterm.m  : 1595: [ 6322]  x_iconify_frame
> nsterm.m  : 6770: [ 6323]  | [EmacsView windowWillMiniaturize:]
> nsterm.m  : 6735: [ 6324]  | [EmacsView windowDidResignKey:]
> nsterm.m  : 1504: [ 6325]  | | ns_frame_rehighlight
> nsterm.m  : 7121: [ 6326]  | [EmacsView windowDidMiniaturize:]
> nsterm.m  : 7591: [ 6327]  | [EmacsView drawRect:(X:578 Y:4)/(W:15 H:472)]
>
> If I understand it correctly, the top-level function involved (within
> nsterm.m) is x_iconify_frame.  The only explicit call pertinent to the
> issue that I see within it is:
>
> [[view window] miniaturize: NSApp];
>
> at nsterm.m:1615.  I think that the others, from windowWillMiniaturize to
> drawRect, are callbacks.  The reason why a miniaturize request triggers a
> drawRect escapes me at this time, but I’m definitely not an expert on this
> GUI.
>
> Thank you and please let me know if I can be of further assistance.
>
> Best regards,
> Ivan
>
>

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