> On Jul 17, 2017, at 4:37 PM, Rick Mann <rm...@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
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