FCPX crash

Whoa!  Today FCPX crashed for something unrelated to BMD Desktop Video.

Process:               Final Cut Pro [724]
Path:                  /Applications/Final Cut Pro.app/Contents/MacOS/Final Cut Pro
Identifier:            com.apple.FinalCut
Version:               10.2.3 (276640)
Build Info:            ProEditor-27664000056000000~1
App Item ID:           424389933
App External ID:       815823966
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           Final Cut Pro [724]
User ID:               505

Date/Time:             2016-04-12 11:48:12.814 -0700
OS Version:            Mac OS X 10.10.5 (14F1713)
Report Version:        11
Anonymous UUID:        162D488E-82D0-5A77-9E01-6CD6CDC5D94C


Time Awake Since Boot: 5600 seconds

Crashed Thread:        15  com.apple.helium.rq.gpu-ru1.vs0

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000021

What happened?  I grouped a bunch of clips in a Compound Clip, and applied a global grading with Color Finale plug-in to the CC. I tweaked Wheels and Curves and I was happy with the result.

Then I went to Share my cut and Export the Timeline to ProRes422 ... and ... Crash.  A meager 120MB out of 2.4GB got written to disk.

On Reloading, my Project was exactly where it was before the crash - Compound Clip created and Color applied.  No need to retrace and redo my last steps!  Now that is one thing I appreciate about FCPX. :))

From there I went on to Share and export again.  No crash, Done.