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On Jul 17, 2017, at 4:37 PM, Rick Mann <rmann@latencyzero.com> wrote:

libBacktraceRecording.dylib`__gcd_queue_item_enqueue_hook_block_invoke:

That library is used by Xcode (or LLDB) to record backtraces of threads, so that the debugger can later show the stack that invoked an async call. I ran into a crash in that library once, and was told it was an Xcode bug. You should probably post this one in a bug report to Apple. You can work around the problem by turning off backtrace recording in the scheme editor. —Jens _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists... This email sent to site_archiver@lists.apple.com