On Sun, Dec 15, 2019 at 08:18:53PM -0500, David T. Lewis wrote:
Hi Eliot,
On Sun, Dec 15, 2019 at 01:55:13PM -0800, Eliot Miranda wrote:
Hi David, Hi Christoph,
On Sun, Dec 15, 2019 at 8:52 AM David T. Lewis lewis@mail.msen.com wrote:
On Sat, Dec 14, 2019 at 04:09:22PM -0800, Eliot Miranda wrote:
On Dec 14, 2019, at 5:43 AM, Thiede, Christoph <
Christoph.Thiede@student.hpi.uni-potsdam.de> wrote:
??? By request, screenshots from a clean image ...
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??? Press over
Press cmd-dot ???
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The screenshots from 5.1 were made in a clean 5.1 image.
Hi Christoph,
I???ve tried this in two trunk 64-bit images, one with the
V3PlusClosures bytecode set and one with the SistaV1 bytecode set and no problem occurs in either case. If this only happens in a clean 5.1 image then I suspect it has already been fixed.
I can reproduce the problem in my trunk image. Chrostoph's example is to debug this:
Generator on: [:stream | stream nextPut: #foo]
The failure happens when I step over the #nextPut:
If I step into the #nextPut: then all is well.
Interesting. I indeed do step over (/not/ step into) and do /not/ see the bug. Dave, Christoph, what VMs are you running?
The VM that I used is:
/usr/local/lib/squeak/5.0-201911282316/squeak Open Smalltalk Cog[Spur] VM [CoInterpreterPrimitives VMMaker.oscog-eem.2597] Unix built on Nov 28 2019 23:23:45 Compiler: 4.2.1 Compatible Clang 7.0.0 (tags/RELEASE_700/final) platform sources revision VM: 201911282316 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Date: Thu Nov 28 15:16:31 2019 CommitHash: 4710c5a Plugins: 201911282316 https://github.com/OpenSmalltalk/opensmalltalk-vm.git CoInterpreter VMMaker.oscog-eem.2597 uuid: 7a69be2e-f0d0-4d41-9854-65432d621fed Nov 28 2019 StackToRegisterMappingCogit VMMaker.oscog-eem.2596 uuid: 8500baf3-a5ae-4594-9f3b-08cedfdf1fb3 Nov 28 2019
But I do not think that this is a VM issue. I get the same result when I run Christoph's snippet on a trunk-level V3 image with an interpreter VM. So the issue must be in the image, not in the VM.
Indeed, I did a quick check on Squeak4.6-15102.image with an interpreter VM, and again I get the same symptoms.
We are probably seeing two different issues here:
1) The debugger gets confused when trying to step over Generator>>nextPut: (presumably something related to the context swap).
2) The <alt><period> interrupt handler gets confused when trying to figure out what to attach itself to after 1) happens.
Both of these are probably issues that have been with us for a long time, and are just now being noticed.
Dave