Incorrect line number in debugging cells

[BradXiao]

Environment data

• VS Code version: 1.62.2
• Jupyter Extension version (available under the Extensions sidebar): 2021.10.1101450599
• Python Extension version (available under the Extensions sidebar): 2021.11.1422169775
• ipykernel: 6.5.0
• OS (Windows | Mac | Linux distro) and version: Windows
• Python and/or Anaconda version: Python 3.7.7
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): conda
• Jupyter server running: Local

Expected behaviour

Debug a function locating the corresponding line.

Actual behaviour

Debug at the incorrect line.

Steps to reproduce:

1. Create and run a cell (cell A) containing a function definition with 'def' at the first line.
2. Create and debug a cell (cell B) calling the defined function.
3. Modify (add two more lines) cell A and run the cell
4. Debug cell B

Logs

Info 2021-11-15 10:01:40: Executing (status Idle) silently Code = import debugpy;debugpy.listen(('localhost', 0))
Info 2021-11-15 10:01:40: Executing silently Code (completed) = import debugpy;debugpy.listen(('localhost', 0))
Info 2021-11-15 10:01:40: connected to notebook during debugging
Info 2021-11-15 10:01:40: Executing (status Idle) silently Code = import debugpy;debugpy.wait_for_client()
Info 2021-11-15 10:01:40: Executing silently Code (completed) = import debugpy;debugpy.wait_for_client()
Info 2021-11-15 10:01:40: import startup: undefined
Info 2021-11-15 10:01:40: Executing (and forget) (status Idle) silently Code = from debugpy import trace_this_thread;trace_this_thread(False)
Info 2021-11-15 10:01:40: Adding hash for 3 = bea1735ac853 with 2 lines
Info 2021-11-15 10:01:40: Executing (and forget) (status Idle) silently Code = from debugpy import trace_this_thread;trace_this_thread(True)
Info 2021-11-15 10:02:29: Finished execution for 6bebbc1f-f99f-4bb9-a157-559b2f59f58c
Info 2021-11-15 10:02:29: stop debugging
Info 2021-11-15 10:02:29: Executing (and forget) (status Idle) silently Code = from debugpy import trace_this_thread;trace_this_thread(False)
Info 2021-11-15 10:02:32: Adding hash for 4 = a2c3aa35981f with 4 lines
Info 2021-11-15 10:02:32: Finished execution for d3e7e2fa-2393-4477-818e-9e3d4473871f
Info 2021-11-15 10:02:39: start debugging
Info 2021-11-15 10:02:39: connected to notebook during debugging
Info 2021-11-15 10:02:40: Executing (status Idle) silently Code = import debugpy;debugpy.wait_for_client()
Info 2021-11-15 10:02:40: Executing silently Code (completed) = import debugpy;debugpy.wait_for_client()
Info 2021-11-15 10:02:40: import startup: undefined
Info 2021-11-15 10:02:40: Executing (and forget) (status Busy) silently Code = from debugpy import trace_this_thread;trace_this_thread(False)
Info 2021-11-15 10:02:40: Adding hash for 5 = bea1735ac853 with 2 lines
Info 2021-11-15 10:02:40: Executing (and forget) (status Busy) silently Code = from debugpy import trace_this_thread;trace_this_thread(True)
Info 2021-11-15 10:02:44: Finished execution for 95b22618-1c7b-4a2e-a434-ab6aa5f34d85
Info 2021-11-15 10:02:44: stop debugging
Info 2021-11-15 10:02:44: Executing (and forget) (status Idle) silently Code = from debugpy import trace_this_thread;trace_this_thread(False)

[DonJayamanne]

Thanks for reporting this issue.
I believe we have resolved this in our development branch.
Please could you install vscode insiders and test this out and let us know if it's fixed.

[BradXiao]

Thanks for replying.

Environment data

• VS Code version: 1.63.0-insider
• Jupyter Extension version (available under the Extensions sidebar): 2021.11.1001452373
• Python Extension version (available under the Extensions sidebar): 2021.11.1422169775
• Others are the same.

The problem exists.

[DonJayamanne]

I'm sorry for not getting back to you on this.
We'll look into this issue, thanks.

[IanMatthewHuff]

Investigating this a bit now. For me this repro is only if black / comment lines are added. I think it might be our stripping code is not detecting the difference. If I add something like a = 100 above the def in cell A and then rerun then the lines do line up correctly.

Yeah, the full repro steps are not even needed. Just adding in the spaces before the def causes the issue.

[philippnoah]

Was this fixed? Think I just ran into this with an inline comment.