Open Radar

 
Summary:
video attached.  project attached

Things happening in this video:
* Project has errors, that's due to migrating to Swift 3, and I'm dealing with the fallout.  Not unexpected
* I build, see some errors, as I'm reading and pondering the errors, they disappear (but I still have the error sigil in the gutter). Usually the errors aren't taken away when reading them.
* I flip forward to another file (which has errors).  There are some error displays in the editor
* flip back to the orignial file. No change.
* flip back to a file with no errors
* flip forward to the original file. No change
* flip forward to the file with errors - the errors are _GONE_.  If I walked up to this file, I'd believe that it was in perfect shape ready to go.
* Flip backward to the original file.  These errors are gone too.

(sourcekit did not crash - I use all-black for my code colorization due to my vision correction)
 
Most likely a quit and restart of Xcode will fix this, but figured show you some evidence of really bad misbehavior that I often see  on a regular basis.

Steps to Reproduce:
1. Build, expecting errors
2. Read the errors

Expected Results:
3. The errors stay around long enough to read

Actual Results:
3. The errors are taken from me, ripped from my grasp.  Also, after navigating through a couple of files, the fact that there are errors in the code completely disappear.

Version:
Version 8.0 beta 3 (8S174q)
10.11.5 (15F34)


Notes:
It's really not that big a deal - just learn to speed-read, but
when these kinds of things happen day-in, day-out, it's just another heavy-sigh
death-of-a-thousand-cuts that makes using Xcode unpleasant.


Configuration:


Attachments:
'now-you-see-them.mp4' and 'GrafDemo.zip' were successfully uploaded.