Django app behaves differently when debugging

[DonJayamanne]

From @albertinix on October 19, 2017 8:1

Environment data

VS Code version: 1.17.2
Python Extension version: 0.7.0
Python Version: 3.6.0
OS and version: Windows 7 64-bit

Actual behavior

I have a Django app, with a view and a form.
The interesting part is here:

loginForm = LoginForm(request.POST or None)

If I set a breakpoint at that line and then skip over it (with F10), then the loginForm object will not be bound (the is_bound property of the form is false).
If however I set the breakpoint one line after that, the loginForm object will be bound.

This is just one example. It happens multiple times over various objects and functions: if I set the breakpoint at one line when calling a function, the result will be "a" (not expected), while if I set the breakpoint after that line, the result is the expected "b".

The debugger seems, in some cases, to introduce some kind of mistakes in code execution.

P.S.: I checked the same app in PyCharm Community and it behaves as it should, debugger or no debugger.

Copied from original issue: DonJayamanne/pythonVSCode#1327

[DonJayamanne]

From @albertinix on October 19, 2017 8:2

At a glance, this might be also linked to https://github.com/DonJayamanne/pythonVSCode/issues/1310

[DonJayamanne]

@albertinix checked #1310, I doubt that's related to this issue.
Just a heads up, the PTVS (Python for Visual Studio) team are currently in the middle of some major re-engineering to debugger (the same debugger I'm using in this extension), and I expect this issue to be resolved soon.

Will look into this and keep you posted.

[albertinix]

Thanks, I will investigate if the issue is still present in the newly released VSCode 1.18.

[brettcannon]

I'm closing this as it has been over a month since we requested more info. If we do get the info at a later date we can re-open this issue.