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Typing messes up terminal/venv activation #24589
Description
Type: Bug
Behaviour
The source /tmp/test/venv/bin/activate command is appended to the current terminal input, which messes it up.
This often happens when typing shortly after launching a new terminal, or when the extension finishes loading at a later time (e.g. due to other extensions or when viewing a large file).
Steps to reproduce:
python3 -m venv venv- Select Interpreter for this venv
- Open terminal with Ctrl+J and quickly type a letter
Output:
a%
❯ asource /tmp/test/venv/bin/activate
zsh: command not found: asourcePeek.2024-12-12.01-15.mp4
Related issue: #23893
Diagnostic data
Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)
2024-12-12 04:02:31.032 [info] Telemetry level is off
2024-12-12 04:02:31.032 [info] Experiments are disabled, only manually opted experiments are active.
2024-12-12 04:02:31.032 [warning] Dir "/tmp/test/.pixi/envs" is not watchable (directory does not exist)
2024-12-12 04:02:31.032 [info] Python interpreter path: ./venv/bin/python
2024-12-12 04:02:31.053 [info] Starting Environment refresh
2024-12-12 04:02:31.053 [info] Searching for interpreters in posix paths locator
2024-12-12 04:02:31.055 [info] Searching for pyenv environments
2024-12-12 04:02:31.055 [info] Searching for conda environments
2024-12-12 04:02:31.055 [info] Searching for global virtual environments
2024-12-12 04:02:31.055 [info] Searching for custom virtual environments
2024-12-12 04:02:31.084 [info] > pyenv which python
2024-12-12 04:02:31.084 [info] cwd: .
2024-12-12 04:02:31.086 [info] pyenv is not installed
2024-12-12 04:02:31.086 [info] Finished searching for pyenv environments: 32 milliseconds
2024-12-12 04:02:31.086 [info] Finished searching for custom virtual envs: 31 milliseconds
2024-12-12 04:02:31.108 [info] > conda info --json
2024-12-12 04:02:31.138 [info] > hatch env show --json
2024-12-12 04:02:31.138 [info] cwd: .
2024-12-12 04:02:31.150 [info] Finished searching for global virtual envs: 96 milliseconds
2024-12-12 04:02:31.202 [info] Found: /bin/python --> /bin/python3.12
2024-12-12 04:02:31.658 [info] Found: /bin/python3 --> /bin/python3.12
2024-12-12 04:02:31.659 [info] Found: /bin/python3.12 --> /bin/python3.12
2024-12-12 04:02:31.796 [info] > /bin/python -I ~/.vscode/extensions/ms-python.python-2024.22.0-linux-x64/python_files/get_output_via_markers.py ~/.vscode/extensions/ms-python.python-2024.22.0-linux-x64/python_files/interpreterInfo.py
2024-12-12 04:02:31.815 [info] Found: /sbin/python --> /sbin/python3.12
2024-12-12 04:02:31.816 [info] Found: /sbin/python3 --> /sbin/python3.12
2024-12-12 04:02:31.817 [info] Found: /sbin/python3.12 --> /sbin/python3.12
2024-12-12 04:02:31.859 [info] > ./venv/bin/python -I ~/.vscode/extensions/ms-python.python-2024.22.0-linux-x64/python_files/get_output_via_markers.py ~/.vscode/extensions/ms-python.python-2024.22.0-linux-x64/python_files/interpreterInfo.py
2024-12-12 04:02:32.728 [info] Found: /usr/bin/python --> /usr/bin/python3.12
2024-12-12 04:02:32.731 [info] Found: /usr/bin/python3 --> /usr/bin/python3.12
2024-12-12 04:02:32.731 [info] Found: /usr/bin/python3.12 --> /usr/bin/python3.12
2024-12-12 04:02:32.796 [info] Found: /usr/sbin/python --> /usr/sbin/python3.12
2024-12-12 04:02:32.797 [info] Found: /usr/sbin/python3 --> /usr/sbin/python3.12
2024-12-12 04:02:32.797 [info] Found: /usr/sbin/python3.12 --> /usr/sbin/python3.12
2024-12-12 04:02:32.840 [info] > /sbin/python -I ~/.vscode/extensions/ms-python.python-2024.22.0-linux-x64/python_files/get_output_via_markers.py ~/.vscode/extensions/ms-python.python-2024.22.0-linux-x64/python_files/interpreterInfo.py
2024-12-12 04:02:32.879 [info] Finished searching for interpreters in posix paths locator: 1806 milliseconds
2024-12-12 04:02:32.879 [info] > /usr/bin/python -I ~/.vscode/extensions/ms-python.python-2024.22.0-linux-x64/python_files/get_output_via_markers.py ~/.vscode/extensions/ms-python.python-2024.22.0-linux-x64/python_files/interpreterInfo.py
2024-12-12 04:02:32.920 [info] > /usr/sbin/python -I ~/.vscode/extensions/ms-python.python-2024.22.0-linux-x64/python_files/get_output_via_markers.py ~/.vscode/extensions/ms-python.python-2024.22.0-linux-x64/python_files/interpreterInfo.py
2024-12-12 04:02:32.920 [info] Environments refresh paths discovered (event): 1869 milliseconds
2024-12-12 04:02:32.920 [info] Environments refresh paths discovered: 1869 milliseconds
2024-12-12 04:02:32.971 [info] Environments refresh finished (event): 1920 milliseconds
2024-12-12 04:02:32.976 [info] Environment refresh took 1926 milliseconds
2024-12-12 04:02:33.462 [info] Starting Pylance language server.
2024-12-12 04:02:35.081 [info] Send text to terminal: source /tmp/test/venv/bin/activate
Extension version: 2024.22.0
VS Code version: Code 1.96.0 (138f619c86f1199955d53b4166bef66ef252935c, 2024-12-11T02:29:09.626Z)
OS version: Linux x64 6.6.54-2-MANJARO
Modes:
- Python version (& distribution if applicable, e.g. Anaconda): 3.12.6
- Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Venv
- Value of the
python.languageServersetting: Pylance
User Settings
languageServer: "Pylance"
Installed Extensions
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| CMake Language Support | josetr.cmake-language-support-vscode | 0.0.9 |
| CMake Tools | ms-vscode.cmake-tools | 1.19.52 |
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| CodeLLDB | vadimcn.vscode-lldb | 1.11.1 |
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| Complete JSDoc Tags | HookyQR.JSDocTagComplete | 0.0.2 |
| Copy GitHub URL | mattlott.copy-github-url | 0.14.0 |
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| CSS Formatter | aeschli.vscode-css-formatter | 1.0.2 |
| deoptexplorer-vscode | rbuckton.deoptexplorer-vscode | 1.1.2 |
| Dev Containers | ms-vscode-remote.remote-containers | 0.394.0 |
| Docker | ms-azuretools.vscode-docker | 1.29.3 |
| EditorConfig for VS Code | EditorConfig.EditorConfig | 0.16.4 |
| esbuild Problem Matchers | connor4312.esbuild-problem-matchers | 0.0.3 |
| ESLint | dbaeumer.vscode-eslint | 3.0.10 |
| Eval and Replace | Lebster.eval-and-replace | 2.3.0 |
| File Utils | sleistner.vscode-fileutils | 3.10.3 |
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| Git Graph | mhutchie.git-graph | 1.30.0 |
| GitHub Actions | github.vscode-github-actions | 0.27.0 |
| GitHub Codespaces | GitHub.codespaces | 1.17.3 |
| GitHub Copilot | GitHub.copilot | 1.250.0 |
| GitHub Copilot Chat | GitHub.copilot-chat | 0.23.0 |
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| GitHub Repositories | GitHub.remotehub | 0.64.0 |
| GitHub Theme | GitHub.github-vscode-theme | 6.3.5 |
| GitLens — Git supercharged | eamodio.gitlens | 16.0.5 |
| GN | npclaudiu.vscode-gn | 1.1.0 |
| Header source switch | ryzngard.vscode-header-source | 1.3.0 |
| Hex Editor | ms-vscode.hexeditor | 1.11.1 |
| Hover Converter | bedrankara.hoverconverter | 0.0.1 |
| IntelliCode Completions | VisualStudioExptTeam.vscodeintellicode-completions | 2.0.1 |
| IntelliCode for C# Dev Kit | ms-dotnettools.vscodeintellicode-csharp | 2.2.3 |
| JavaScript Debugger | ms-vscode.js-debug | 1.96.0 |
| JavaScript Debugger Companion Extension | ms-vscode.js-debug-companion | 1.1.3 |
| JS Refactoring Assistant | p42ai.refactor | 3.0.1 |
| Jupyter | ms-toolsai.jupyter | 2024.11.0 |
| Jupyter Cell Tags | ms-toolsai.vscode-jupyter-cell-tags | 0.1.9 |
| Jupyter Keymap | ms-toolsai.jupyter-keymap | 1.1.2 |
| Jupyter Notebook Renderers | ms-toolsai.jupyter-renderers | 1.0.21 |
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| Lebab | mrmlnc.vscode-lebab | 2.6.0 |
| Markdown PDF | yzane.markdown-pdf | 1.5.0 |
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| Paste JSON as Code | quicktype.quicktype | 23.0.170 |
| Patch Extensions | j4k0xb.patch-extensions | 0.0.1 |
| Peggy Language | PeggyJS.peggy-language | 3.0.2 |
| PlatformIO IDE | platformio.platformio-ide | 3.3.3 |
| Prettier - Code formatter | esbenp.prettier-vscode | 11.0.0 |
| Pylance | ms-python.vscode-pylance | 2024.12.1 |
| Python | ms-python.python | 2024.22.0 |
| Python Debugger | ms-python.debugpy | 2024.14.0 |
| Quokka.js | WallabyJs.quokka-vscode | 1.0.675 |
| Rainbow CSV | mechatroner.rainbow-csv | 3.13.0 |
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| Remote - SSH: Editing Configuration Files | ms-vscode-remote.remote-ssh-edit | 0.87.0 |
| Remote - Tunnels | ms-vscode.remote-server | 1.5.2 |
| Remote Development | ms-vscode-remote.vscode-remote-extensionpack | 0.26.0 |
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| Smalise | LoyieKing.smalise | 0.0.12 |
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System Info
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| CPUs | Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz (12 x 2600) |
| GPU Status | 2d_canvas: enabled canvas_oop_rasterization: enabled_on 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 skia_graphite: disabled_off video_decode: enabled video_encode: disabled_software vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off webnn: disabled_off |
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| Process Argv | |
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| VM | 0% |
| DESKTOP_SESSION | plasma |
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Activity
[-]source command race condition[/-][+]Typing messes up terminal/venv activation[/+]karthiknadig commentedon Dec 12, 2024
We can’t avoid running activation scripts in cases where VS Code is not launched from an activated environment. The best thing to do here is turn off activation and launch VS Code from an activated environment.
Here is how:
code .This will star VS Code itself in an activated environment and there is no need for us to activate it later.
j4k0xb commentedon Dec 12, 2024
I don't mind if it's running activation scripts, but is it possible that it won't interfere with the terminal input?
karthiknadig commentedon Dec 12, 2024
The support for that requires "Shell Integration" feature to be on. With that it can work a little bit better, and hopefully we can do this better as the feature improves:
j4k0xb commentedon Dec 12, 2024
Unfortunately it has the same behavior with shell integration enabled
anthonykim1 commentedon Dec 12, 2024
It looks like timeout https://github.com/microsoft/vscode-python/blob/main/src/client/common/terminal/service.ts#L100 is not "long enough" to wait for executeCommand.
If j4k0xb check your Python output after setting your log level to "trace"
You will see something along the lines of "send text...source /tmp/test/venv/bin/activate..." instead of "executeCommand...source /tmp/test/venv/bin/activate..."
We may have to do improve to more frequently use executeCommand such as via caching shell integration state from previous session. Or figure out different way to completely wait for activate command before allowing user input in terminal.
Using pwsh 6 or 7 instead of the default windows pwsh provided by Microsoft can really help with executeCommand, shell integration related.
j4k0xb I assume you will notice the duplicate commands wont really happen after the very first run in terminal. Is that correct?
j4k0xb commentedon Dec 12, 2024
yes
I only encountered this issue during the first activation in a terminal
anthonykim1 commentedon Dec 12, 2024
Thanks for the info
j4k0xb Can you switch to using pwsh 6 or pwsh 7 instead of the windows powershell provided by default in your Windows OS and see if you can still repro the problem?
j4k0xb commentedon Dec 12, 2024
(I don't use Windows or PowerShell)
but can repro with bash, sh, zsh in Linux
pwsh 7 behaves a bit different as it only inserts the command but doesn't execute it (have to press enter):
Peek.2024-12-12.19-55.mp4
anthonykim1 commentedon Jan 5, 2025
gotcha, thanks for the response.
Will attach need-spike as it need further investigation.
bersbersbers commentedon Feb 11, 2025
I feel this is a regression from earlier behavior, as this has been working fine for months or even years (I was using
pythonTerminalEnvVarActivation). Something seems to have changed around the time that 1.97.0 was released. I know there is a lot of work around this experiment and moving to the environments extension, but in my opinion, this transition should smoother for folks that have been using the experiment fine for a long time.karthiknadig commentedon Feb 11, 2025
I am working on a replacement the env var experiment, that should give a better outcome. The way it is done currently breaks shell aliases added to the terminal shell on activation. The new approach hopefully will handle that.
Another issue is that we capture env variables for default terminal shell, this causes issues with the prompt when other shells are run.
karthiknadig commentedon Feb 11, 2025
bersbersbers try disabling shell integrations. That might help with restoring how it used to behave.
bersbersbers commentedon Feb 11, 2025
Karthik Nadig (@karthiknadig) you mean
python.terminal.shellIntegration.enabled?This is already disabled :(
karthiknadig commentedon Feb 11, 2025
bersbersbers Can you create a separate bug? All the new stuff that we are adding should be turned off, if this is disabled. This is a regression if it is not.
bersbersbers commentedon Feb 11, 2025
Karthik Nadig (@karthiknadig) I investigated this in a clean profile, and this seems to have been an interaction between the Python extension, the
pythonTerminalEnvVarActivationexperiment, and the Python environments extension. I actually get the best results currently with the Python extension opted into the experiment; the environments extension disabled; andanthonykim1 commentedon Feb 2, 2026
We're planning to move towards better auto-activation experience:
Try install https://marketplace.visualstudio.com/items?itemName=ms-python.vscode-python-envs , and download the latest-pre-release.
Please set
python-envs.terminal.autoActivationTypetoshellStartupin your settings.Also add
"python.useEnvironmentsExtension": true,to your settings.json.Please file issue on https://github.com/microsoft/vscode-python-environments/issues if you see problem again, thanks.
Closing aginst: microsoft/vscode-python-environments#962
dspyz-matician commentedon Feb 26, 2026
I don't see what this has to do with the ticket it was marked as a duplicate of
karthiknadig commentedon Feb 26, 2026
Activations will not send a command but instead will happen as a part of terminal shell startup. So there is no command to execute at the prompt. So prompt will be ready for user import and activation won’t be disrupted by command execution.
rmx90210 commentedon Jul 19, 2026
Hi all! I'm running into this as well as it's fairly annoying/disruptive. My steps to reproduce are:
source /path/to/cwd/.venv/bin/activateand I'm returned to a fresh command prompt, losing what I was typing in Step 2.I'm using macOS 26.5.1, VS Code 1.129.1. I use Starship for my zsh prompt. I've confirmed that shell integration is active (i.e.
$VSCODE_SHELL_INTEGRATION=1) and I see gutter icons in the terminal.Anthony Kim (@anthonykim1) Karthik Nadig (@karthiknadig) by any chance are there any updates on when a fix will land in VS Code? Thank you in advance for any updates on this!
thephet commentedon Jul 30, 2026
I am having the same issue.