Description
Type: Bug
Behaviour
Expected vs. Actual
I'm experiencing a very disruptive cursor rendering issue in python interpreter, when I updated to the latest vs code 1.86.0. The cursor in the python interpreter gets stuck on code lines that span multiple lines: When tracking to the left, the rendering gets stuck and edits at a different location than displayed. Vs Expected: you should be able to scroll to the left and have the cursor not get stuck.
I reverted VS Code and python extension to older versions, and the issue was still present.
System information: VS code version 1.86.0 and 1.85.2 (tried fixing across multiple versions)
Python version: 2024.0.0 and 2025.25.10292213.vsix
Steps to reproduce:
- Step 1: Update to VS code 1.86.0
- Step 2: paste a multi-line command into the terminal
- Step 3: use the left arrow to navigate left until you reach the prior line. The rendered cursor stopped before reaching the prior lines, despite how many times I press left. I pressed the left arrow key ~10-11 times.
- Step 4: Try pressing backspace, and the actual cursor was editing a place 10-11 characters to the left of where the cursor was stuck. (i.e., the i from simple was deleted instead of the t from prompt:
After this error, if you press the down arrow, the cursor rendering is way off in random places, and it gets really wacky (e.g., cursors in the middle of the screen, etc.
The problem does not occur when I start python from the terminal.
Ultimately, I need a way to send multi-line blocks to the terminal line-by-line (e.g., using shift-enter). This is a critical efficiency need that dictates which ide I use. There weren't any problems until the most recent updates to 1.86.0
Note: I tried many options like disabling GPU acceleartion, hardware acceleration, and anything i could find from searching for this issue.
Diagnostic data
- Python version (& distribution if applicable, e.g. Anaconda): 3.8.18
- Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Venv
- Value of the
python.languageServersetting: Default
Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)
XXX
User Settings
languageServer: "Pylance"
Extension version: 2023.25.10292213
VS Code version: Code 1.85.2 (8b3775030ed1a69b13e4f4c628c612102e30a681, 2024-01-18T06:40:32.531Z)
OS version: Darwin x64 21.6.0
Modes:
System Info
| Item | Value |
|---|---|
| CPUs | Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz (8 x 2500) |
| GPU Status | 2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled |
| Load (avg) | 1, 2, 2 |
| Memory (System) | 16.00GB (0.04GB free) |
| Process Argv | --crash-reporter-id 176f9fb8-6147-483c-8438-c8dec2a25aa9 |
| Screen Reader | no |
| VM | 0% |
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