On 8 Dec 2016, at 14:49, Koen Punt wrote:

Thanks for the info. Now I'm wondering, is the issue specific to xcodeproj files or can it happen with other files too?

Everyone who has contacted us about it, has mentioned Xcode project files as the source, though the crash log does not directly point to the Xcode data source being responsible, and I wouldn’t think it is directly responsible, as of such, it shouldn’t be able to cause anything special, as it’s a self-contained data source that does not speak directly with the NSOutlineView, where the crash (stack overflow) happens.

I could remove the Xcode support, this should cause no issues other than taking away functionality. Don’t know if anyone depend on this.