emacs stalls using 100% CPU

[Rockefeller, Harry]

Intermittent problem.  It's happening more often again.
NEW info, when top is run the memory columns (VIRT RES and SHR) data toggles 
Back and forth for COMMAND "emacs-X11" and "XWin".  See attached top log.
The situation is recoverable with kill -9 of emacs-X11 process.

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