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

[Alan Third]

On Thu, May 05, 2016 at 11:25:06PM +0200, Ivan Cibrario Bertolotti wrote:
> Emacs crashes when using the suspend-frame command (bound
> to C-z by default) on the main frame.  It works correctly when the frame
> is minimized by clicking on the GUI button.
> 
> Recipe: Start emacs -Q; type C-z; Emacs crashes with:
> Fatal error 11: Segmentation faultAbort trap: 6

The last thing it does before crashing (but after minimizing) is:

[EmacsView drawRect:(X:578 Y:4)/(W:15 H:472)]

Which is a rather tall and narrow box.

If I turn off scroll-bars it doesn't crash.

Emacs really shouldn't be trying to draw scroll-bars to the screen
when it's minimized, I'd think.

I'll look into it more when I've got some time.

-- 
Alan Third