Breakpoints disappear

[incendial]

Describe the bug
Adding breakpoints causes some of the existing breakpoints to disappear.
I mean, I like arcades, but this feels too much 😂.

Screen.Recording.2023-06-20.at.20.20.27.mov

To Reproduce
Steps to reproduce the behavior:

1. Run a test with a breakpoint
2. When the tests stops at the breakpoint, try add new breakpoints

Please complete the following information:

• Operating System and version: MacOS 12.6
• VS Code version: 1.79.2
• Dart extension version: 3.66.0
• Dart/Flutter SDK version: Dart SDK version: 3.1.0-63.1.beta (beta)

[DanTup]

I can't reproduce this (although I see an issue with them becoming unverified - I've opened #4599 to look at this). Can you test it on a newly created app so I can be sure I'm performing the same steps, and could you also capture a log:

• Run the Dart: Capture Debugging Logs command
• Reproduce the issue
• Click Cancel on the logging notification to stop logging and open the log
• Remove anything sensitive from the log
• Attach the log here, in a gist, or email to me at logs@dartcode.org.

Thanks!

[incendial]

Do you need a new app AND logs? Or I can just collect logs in my project and send you?

[DanTup]

A new app is best, because it confirms it can be reproduced in the code I'm testing with (I often spend time trying to repro things that seem like they should always happen, but are actually triggered by some specific things).

Logs are always useful though. If it happens in a new project, just those logs are fine. If it doesn't happen there, logs for your project may help.

[incendial]

I was not able to repro it on a new project, but here is the log from the one I have the problem in:

Dart-Code-Log-2023-05-00 16-07-29.txt

Does it help?

[woprandi]

I was able to reproduce on a new app :

Dart-Code-Log-2023-05-01 15-22-36.txt

[DanTup]

@incendial thanks - looking through your log I see something wrong - we seem to resolve two breakpoints using the same ID, and I think that could be "merging" them in VS Code (we don't actually have any code that ever removes breakpoints):

[16:07:47] [DAP] [Info] <== {"seq":220,"type":"event","body":{"breakpoint":{"id":100072,"line":39,"verified":false},"reason":"changed"},"event":"breakpoint"}
[16:07:47] [DAP] [Info] <== {"seq":221,"type":"event","body":{"breakpoint":{"column":18,"id":100072,"line":39,"verified":true},"reason":"changed"},"event":"breakpoint"}
[16:07:47] [DAP] [Info] <== {"seq":222,"type":"event","body":{"breakpoint":{"column":9,"id":100072,"line":42,"verified":true},"reason":"changed"},"event":"breakpoint"}

However, it's not clear to me why this happened because the VM Service traffic was not logged and I'm not sure what the source file looked liked. Are you able to capture a log while also recording what you see, and ensure you start logging before you start the debug session, so that the VM Service traffic is also logged?

@woprandi I checked your log, but I only see a single breakpoint being set - it's not clear to me what you're seeing. Can you provide details of what you did/saw, and if possible also a recording of what you're seeing with a matching log. Thanks!

[incendial]

Ah, I started the recording after pressing the debug button. Sure, I'll send you a full version soon.

[woprandi]

@DanTup Sorry it's a bad analysis. I didn't reproduce on new app.

[DanTup]

@woprandi np! Are you seeing this too, in a different project? A log file of it happening (that was started before the debug session, so that logging of VM Service traffic is enabled) would be very useful even if not on a new project. A recording of the behaviour (or at least a clear description of what happens), and a copy of the lines around where breakpoints are added/disappear would also definitely help.

If you can think of anything different in your project that might explain the difference with a new project, that might help too. For example, are there unsaved files? Or modified and saved files? Have you hot-reloaded before this happens? Are you using any sort of codegen that may have run since the session started? Do you have multiple isolates (and if so, could they have loaded different versions of the same packages?).

Thanks!

[incendial]

@DanTup send you an email