[OpenSmalltalk/opensmalltalk-vm] 979938: CogVM source as per VMMaker.oscog-eem.2968

 
  Branch: refs/heads/Cog
  Home:   https://github.com/OpenSmalltalk/opensmalltalk-vm
  Commit: 979938571dbbab68b867a3b2dc7a77f98fbd3b0c
      https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/979938571dbbab68b867a3b2dc7a77f98fbd3b0c
  Author: Eliot Miranda <[hidden email]>
  Date:   2021-06-18 (Fri, 18 Jun 2021)

  Changed paths:
    M spur64src/vm/cointerp.c
    M spur64src/vm/cointerp.h
    M spur64src/vm/cointerpmt.c
    M spur64src/vm/cointerpmt.h
    M spur64src/vm/gcc3x-cointerp.c
    M spur64src/vm/gcc3x-cointerpmt.c
    M spurlowcode64src/vm/cointerp.c
    M spurlowcode64src/vm/cointerp.h
    M spurlowcode64src/vm/gcc3x-cointerp.c
    M spurlowcodesrc/vm/cointerp.c
    M spurlowcodesrc/vm/cointerp.h
    M spurlowcodesrc/vm/gcc3x-cointerp.c
    M spurlowcodestack64src/vm/gcc3x-interp.c
    M spurlowcodestack64src/vm/interp.c
    M spurlowcodestacksrc/vm/gcc3x-interp.c
    M spurlowcodestacksrc/vm/interp.c
    M spursista64src/vm/cointerp.c
    M spursista64src/vm/cointerp.h
    M spursista64src/vm/gcc3x-cointerp.c
    M spursistasrc/vm/cointerp.c
    M spursistasrc/vm/cointerp.h
    M spursistasrc/vm/gcc3x-cointerp.c
    M spursrc/vm/cointerp.c
    M spursrc/vm/cointerp.h
    M spursrc/vm/cointerpmt.c
    M spursrc/vm/cointerpmt.h
    M spursrc/vm/gcc3x-cointerp.c
    M spursrc/vm/gcc3x-cointerpmt.c
    M spurstack64src/vm/gcc3x-interp.c
    M spurstack64src/vm/interp.c
    M spurstack64src/vm/validImage.c
    M spurstacksrc/vm/gcc3x-interp.c
    M spurstacksrc/vm/interp.c
    M spurstacksrc/vm/validImage.c
    M src/vm/cointerp.c
    M src/vm/cointerp.h
    M src/vm/gcc3x-cointerp.c
    M stacksrc/vm/gcc3x-interp.c
    M stacksrc/vm/interp.c

  Log Message:
  -----------
  CogVM source as per VMMaker.oscog-eem.2968

In rare circumstances the Display bits oop can be nil post GC.
Avoid an assert failure and unnecessary work if it is.