All the threads only contain system calls. The crashed thread only contains a single call to my app's code which is main.swift:13.
What could cause such a crash?
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Xcode downloads client crash report for NSOutlineView._updateDisclosureButtonForRowView with reason "Segmentation fault" but the stacktraces don't contain any of my app's symbols
Do you get the same results with just the relevant code in a small test project? If so, please share a link to your test project. That'll help us better understand what's going on. If you're not familiar with preparing a test project, take a look at Creating a test project.
Albert Pascual Worldwide Developer Relations.
It's a client crash report downloaded by Xcode, which is why I have no means of reproducing it myself and am wondering what could possibly cause this.