Open Radar

 
Summary:
Hi!  This is a hard one to explain, and I've only been able to catch it "on camera" once, but it happens to me fairly often.

TL;DR - some combination of ^P and ^I is killing Xcode

I use emacs navigation keybindings a lot. I also use ^I a lot to indent lines - the default indentation Xcode chooses for me is usually not correct, so I fix it as I navigate over it.

Attached are about 6 crashlogs caused by this.

Here's a video that I captured during an Xcode9 demo to my local (Pittsburgh) cocaheads.  (I was screen recording, but forgot to have it record the microphone :-(  )  Overall my coocaheads are really impressed with Xcode9) : https://www.dropbox.com/s/redacted/control-killer.mp4?dl=0

The video is slowed down to 1/3rd speed, and it shows the keystrokes being done in all their glory.

(If you end up asking for a sysdiagnose, lemme know specifically what you want plzkthx - they're _gigantic_ and hose my DSL connection for an hour to upload.)

Steps to Reproduce:
come combination of ^P and ^I.  Check out the video for one caught en medias res.  I haven't been able to reliably reproduce it, but it happens to me occasionally, especially when I'm adding something brand new, like a new protocol or extension.

Expected Results:
see summary

Observed Results:
see summary

Version:
10.12.5 (16F73)
Version 9.0 beta 3 (9M174d)

Notes:


Configuration: