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Hi Eliot,<br>
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cool that you're fixing that, we've had hacks working around this bug in RSqueakVM for ages, because we couldn't quite figure out what the real fix would look like.<br>
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Best,<br>
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Tim<br>
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From: Eliot Miranda<br>
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Sent: Monday, October 1, 13:20<br>
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Subject: Re: [Vm-dev] Latest VM "tears" screen<br>
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To: Open Smalltalk Virtual Machine Development Discussion<br>
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Hi Alistair, > On Oct 1, 2018, at 12:15 PM, Alistair Grant wrote: > > Hi Everyone, > > I've just rebuilt my vmmaker squeak image and found that dragging > windows around "tears" the windows underneath, as shown in the > attached image. Bringing the damaged
window to the front causes the > contents to be redrawn correctly. > > I also saw this when building a pharo vm a couple of days ago. It > causes tests in PNGReadWriterTest class to fail (#test2BitReversed, > #test4BitReversed and #test8BitReversed from memory).
> > I'm guessing the change was made in the last 6 weeks or so. > > If no one recognises this I'll start looking at it in a few days (I hope). See the changes in my latest commit. I am trying to fix a serious bug in copyBits, namely reading the word past the
last word in a bitmap in certain cases (ie a case where preload is true but the trailing word is not used). I know my changes are correct for deep bitmaps but they’re clearly broken for depths 8 and less. Please post test cases here. I need to look using the
simulator to try and figure things out. I am currently looking at the #test2BitReversed, #test4BitReversed and #test8BitReversed cases to try and figure out what’s wrong. > > Thanks, > Alistair > > > $ sqlinux.201809301616/squeak --version > 5.0-201809301616
Sun Sep 30 16:24:40 UTC 2018 gcc 4.8 [Production > Spur 64-bit VM] > CoInterpreter VMMaker.oscog-eem.2437 uuid: > 0e97c106-dd0b-437b-b1aa-e15257288c3f Sep 30 2018 > StackToRegisterMappingCogit VMMaker.oscog-eem.2432 uuid: > 7b14d114-0e04-4e46-b8a7-4b5e6d87f5fe
Sep 30 2018 > VM: 201809301616 https://github.com/OpenSmalltalk/opensmalltalk-vm.git > Date: Sun Sep 30 09:16:55 2018 CommitHash: 057c592 > Plugins: 201809301616 https://github.com/OpenSmalltalk/opensmalltalk-vm.git > Linux travis-job-0b521285-dae6-496e-a96c-06870f88a3a5
> 4.4.0-101-generic #124~14.04.1-Ubuntu SMP Fri Nov 10 19:05:36 UTC 2017 > x86_64 x86_64 x86_64 GNU/Linux > plugin path: sqlinux.201809301616/lib/squeak/5.0-201809301616 > [default: /home/alistair/vmmaker/opensmalltalk-vm/image20181001/sqlinux.201809301616/lib/squeak/5.0-201809301616/]
> > OS: Ubuntu 16.04 > <br>
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