Clicking the "New File" and "Open a File" on the toolbar causes Emacs to crash

[dixius99]

When I click on the Toolbar icons to open a file or create a new file, Emacs totally crashes, and the macOS Problem Report window opens. The same thing happens if I click on the "Open a File" link on the fancy splash screen. I'm happy to share the full problem report generated by macOS, though I feel like the following is the important part:

*** Terminating app due to uncaught exception 'NSObjectNotAvailableException', reason: 'EmacsSavePanel is not a supported subclass for sandboxing'
abort() called
terminating with uncaught exception of type NSException

I've asked around in various places, and while some others have issues with accessing files on Catalina, I haven't heard of anyone else having a full crash like this.

I'd like to add that I don't think this is something specific to David Caldwell's builds. If I build from source on my own, I still get the same problem.

Also of note is that if I install Emacs, either using David's builds or other distributions, in a virtual machine, I do not get the problem. I have a VM set up that has identical settings to my actual macOS install, and Emacs works fine. However, even with a completely fresh install of macOS on my computer, I get the crash.

On my Mac, I've tried things like granting Emacs.app and /usr/bin/ruby full disk access. I've tried fixing permissions per this page. I've tried a variety of distributions, building my own, etc., and the problem persists.

This is also only an issue when clicking on the buttons or on the link, to get the GUI file chooser. dired works fine.

Not sure where to turn at this point, but any suggestions would be greatly appreciated.

[caldwell]

This is probably related to #84?