I haven't tried to reproduce it yet, but I think the cause of the problem 
is that Project - where the new start up code is - is the 41st on the 
StartUpList, while DisplayScreen was the 4th.
It is possible that objects between those two indexes assume that the 
Display had been set up correctly when their #startUp: method is sent.

Also, I just went through the StartUpList and I found that it includes 
classes which do not override #startUp or #startUp:, so their existence on 
the list is questionable.

There are also plenty of classes which implement #startUp instead of 
#startUp:, which is a problem because #startUp should be deprecated and 
removed.

Very likely there are similar issues with the ShutDownList.


Levente

On Sun, 24 May 2020, Jakob Reschke wrote:

> The failure is introduced when I load Graphics-mt.432.
>
> More specifically, I see these changes:
> DisplayScreen class>>shutDown (removed)
> DisplayScreen class>>startUp (removed)
> DisplayScreen>>restore (changed)
> DisplayScreen>>shrink
> DisplayScreen>>shutDown (removed)
> Graphics package postscript (changed)
>
> It fails after I load either of these:
> DisplayScreen class>>startUp (removed)
> Graphics package postscript (changed)
>
> The rest of the changes I can load without breaking the image.
>
> Am Fr., 22. Mai 2020 um 18:36 Uhr schrieb Jakob Reschke
> <forums.jakob at resfarm.de>:
>>
>> This is from the image before the update, the VM is the same (should
>> be the 5.3 release VM if I remember correctly):
>>
>> Image
>> -----
>> C:\Users\Jakob\HiDrive\Squot-trunk-64bit.2.image
>> Squeak6.0alpha
>> latest update: #19634
>> Current Change Set: Git unit of work
>> Image format 68021 (64 bit)
>>
>> Virtual Machine
>> ---------------
>> C:\Squeak\VMs\Squeak64\Squeak64.exe
>> Open Smalltalk Cog[Spur] VM [CoInterpreterPrimitives VMMaker.oscog-nice.2715]
>> Win32 built on Mar  3 2020 08:36:19 GMT Compiler: 4.2.1 Compatible
>> Clang 8.0.1 (tags/RELEASE_801/final)
>> platform sources revision VM: 202003021730
>> https://github.com/OpenSmalltalk/opensmalltalk-vm.git Date: Mon Mar 2
>> 18:30:55 2020 CommitHash: 6a0bc96 Plugins: 202003021730
>> https://github.com/OpenSmalltalk/opensmalltalk-vm.git
>> CoInterpreter VMMaker.oscog-nice.2715 uuid:
>> 78e2f556-9829-42fe-963d-e19dfc43c0e9 Mar  3 2020
>> StackToRegisterMappingCogit VMMaker.oscog-eem.2719 uuid:
>> e40f3e94-3a54-411b-9613-5d19114ea131 Mar  3 2020
>>
>> Am Fr., 22. Mai 2020 um 18:33 Uhr schrieb Jakob Reschke
>> <forums.jakob at resfarm.de>:
>> >
>> > Hi all,
>> >
>> > I just updated my Squeak trunk image. After saving, I cannot reload it:
>> >
>> > ---------------------------
>> > Squeak!
>> > ---------------------------
>> > Aborting!!!!
>> > Color depth 0 not supported
>> > ---------------------------
>> > OK
>> > ---------------------------
>> >
>> > Then it prints the stack trace and exits.
>> >
>> > I restored a backup from yesterday and reloaded my own changes. An
>> > image saved from that is still functional. After updating Squeak
>> > again, I see the same error as above, so it is reproducible.
>> >
>> > But I cannot invoke the error with a fresh image... so it must be
>> > something with my image after all. Any ideas or suggestions? Does
>> > anyone else experience issues after an update?
>> >
>> > Kind regards,
>> > Jakob