Wrong syntax highlighting for triple-quoted F-strings #25798
Description
Type: Bug
Behaviour
It is confused by standalone triple quotes as beginning a docstring comment.
Steps to reproduce:
- Open a new tab with this snippet:
def foo():
"""
Sample function that does nothing.
"""
return f"""
This is a {foo.__name__} multi-line string that is returned by
the function.
"""
def bar():
"""
Wrong highlighting ends on the opening triple quotes of the docstring
of this function.
"""
return ""
Diagnostic data
Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)
2026-02-16 08:19:45.318 [info] Native locator: Refresh started
2026-02-16 08:19:45.318 [info] Skipping ActivatedEnv Detection: process.env.VSCODE_CLI !== '1'
2026-02-16 08:19:45.318 [info] > conda info --json
2026-02-16 08:19:45.380 [info] > pyenv which python
2026-02-16 08:19:45.380 [info] cwd: .
2026-02-16 08:19:46.310 [info] Python interpreter path: ./.venv/bin/python
2026-02-16 08:19:46.396 [info] Native locator: Refresh finished in 1592 ms
2026-02-16 08:19:47.862 [info] Starting Pylance language server.
Extension version: 2026.0.0
VS Code version: Code 1.109.3 (b6a47e94e326b5c209d118cf0f994d6065585705, 2026-02-12T17:54:48.470Z)
OS version: Darwin arm64 25.2.0
Modes:
- Python version (& distribution if applicable, e.g. Anaconda): 3.13.7
- Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Venv
- Value of the
python.languageServersetting: Default
User Settings
languageServer: "Pylance"
Installed Extensions
| Extension Name | Extension Id | Version |
|---|---|---|
| append-comma | vco | 0.0.1 |
| azure-dev | ms- | 0.10.0 |
| better-cpp-syntax | jef | 1.27.1 |
| catppuccin-vsc | Cat | 3.18.1 |
| catppuccin-vsc-icons | Cat | 1.26.0 |
| catppuccin-vsc-pack | cat | 1.0.2 |
| cmake | twx | 0.0.17 |
| cmake-tools | ms- | 1.22.27 |
| code-runner | for | 0.12.2 |
| codesnap | adp | 1.3.4 |
| copilot-chat | Git | 0.37.6 |
| cpptools | ms- | 1.30.5 |
| cpptools-extension-pack | ms- | 1.3.1 |
| cpptools-themes | ms- | 2.0.0 |
| csdevkit | ms- | 2.10.3 |
| csharp | ms- | 2.120.3 |
| cucumberautocomplete | ale | 3.1.0 |
| custom-ui-style | sub | 0.6.7 |
| dart-code | Dar | 3.128.0 |
| debugpy | ms- | 2025.18.0 |
| docker | doc | 0.18.0 |
| docomment | k-- | 1.0.1 |
| docs-view | bie | 0.1.0 |
| doxdocgen | csc | 1.4.0 |
| durablefunctionsmonitor | Dur | 6.7.3 |
| EditorConfig | Edi | 0.18.1 |
| editorconfiggenerator | nep | 0.2.1 |
| elixir-ls | Jak | 0.30.0 |
| elm-ls-vscode | elm | 2.8.0 |
| emojisense | bie | 0.10.0 |
| es6-string-html | Tob | 2.17.0 |
| even-better-toml | tam | 0.21.2 |
| flutter | Dar | 3.128.0 |
| git-project-manager | fel | 1.8.2 |
| githistory | don | 0.6.20 |
| github-markdown-preview | bie | 0.3.0 |
| gitignore | cod | 0.10.0 |
| gitlens | eam | 17.10.0 |
| go | gol | 0.52.2 |
| isort | ms- | 2025.0.0 |
| javascript-ejs-support | Dig | 1.3.3 |
| jinjahtml | sam | 0.20.0 |
| js-debug | ms- | 1.105.0 |
| js-debug-companion | ms- | 1.1.3 |
| jsdoc-markdown-highlighting | bie | 0.0.1 |
| json-minifier | Ren | 0.0.2 |
| jupyter | ms- | 2025.9.1 |
| jupyter-keymap | ms- | 1.1.2 |
| jupyter-renderers | ms- | 1.3.0 |
| language-gettext | mro | 0.5.0 |
| markdown-all-in-one | yzh | 3.6.3 |
| markdown-checkbox | bie | 0.4.0 |
| markdown-emoji | bie | 0.3.1 |
| markdown-footnotes | bie | 0.1.1 |
| markdown-image-size | bie | 0.0.4 |
| markdown-mermaid | bie | 1.32.0 |
| markdown-preview-enhanced | shd | 0.8.20 |
| markdown-preview-github-styles | bie | 2.2.0 |
| markdown-shiki | bie | 0.1.1 |
| markdown-yaml-preamble | bie | 0.1.0 |
| material-icon-theme | PKi | 5.31.0 |
| mdc | Nux | 0.5.0 |
| mermaid-markdown-syntax-highlighting | bpr | 1.7.6 |
| metals | sca | 1.63.0 |
| microsoft-testing | ms- | 0.2.0 |
| migrate-java-to-azure | vsc | 1.12.1 |
| ng-template | Ang | 21.1.1 |
| noctis | liv | 10.43.3 |
| pascalcase-camelcase-to-snakecase-converter | mar | 0.2.2 |
| pgformatter | bra | 1.33.0 |
| plantuml | jeb | 2.18.1 |
| postcss | css | 1.0.9 |
| prettier-vscode | esb | 12.3.0 |
| protobuf-vsc | DrB | 1.6.0 |
| pubspec-assist | jer | 2.3.2 |
| pulumi-lsp-client | pul | 0.2.3 |
| pulumi-vscode-copilot | pul | 0.3.4 |
| pulumi-vscode-tools | pul | 0.4.0 |
| python | ms- | 2026.0.0 |
| rainbow-csv | mec | 3.24.1 |
| remote-containers | ms- | 0.442.0 |
| remote-explorer | ms- | 0.5.0 |
| remote-ssh | ms- | 0.122.0 |
| remote-ssh-edit | ms- | 0.87.0 |
| rest-client | hum | 0.25.1 |
| ruff | cha | 2026.36.0 |
| scala | sca | 0.5.9 |
| shader | sle | 1.1.5 |
| significant-other | jas | 0.3.0 |
| slidev | ant | 52.12.0 |
| terraform | has | 2.37.7 |
| test-adapter-converter | ms- | 0.2.1 |
| todo-tree | Gru | 0.0.226 |
| trailing-semicolon | nau | 1.0.2 |
| vscode-as-git-mergetool | zaw | 0.14.0 |
| vscode-azure-github-copilot | ms- | 1.0.153 |
| vscode-azure-mcp-server | ms- | 1.0.1 |
| vscode-azureappservice | ms- | 0.26.4 |
| vscode-azurecontainerapps | ms- | 0.10.0 |
| vscode-azurefunctions | ms- | 1.20.3 |
| vscode-azureresourcegroups | ms- | 0.12.0 |
| vscode-azurestaticwebapps | ms- | 0.13.2 |
| vscode-azurestorage | ms- | 0.17.1 |
| vscode-azurevirtualmachines | ms- | 0.6.10 |
| vscode-bicep | ms- | 0.40.2 |
| vscode-containers | ms- | 2.4.1 |
| vscode-cosmosdb | ms- | 0.30.2 |
| vscode-docker | ms- | 2.0.0 |
| vscode-dotnet-runtime | ms- | 3.0.0 |
| vscode-eslint | dba | 3.0.20 |
| vscode-github-actions | git | 0.31.0 |
| vscode-graphql | Gra | 0.13.2 |
| vscode-graphql-execution | Gra | 0.3.2 |
| vscode-graphql-syntax | Gra | 1.3.8 |
| vscode-java-upgrade | vsc | 1.12.1 |
| vscode-js-profile-table | ms- | 1.0.10 |
| vscode-json5 | mrm | 1.0.0 |
| vscode-jupyter-cell-tags | ms- | 0.1.9 |
| vscode-jupyter-slideshow | ms- | 0.1.6 |
| vscode-markdown-everywhere | zha | 0.0.17 |
| vscode-monorepo-workspace | fol | 1.3.1 |
| vscode-node-azure-pack | ms- | 1.8.0 |
| vscode-peacock | joh | 4.2.2 |
| vscode-pgsql | ms- | 1.16.0 |
| vscode-pylance | ms- | 2025.10.4 |
| vscode-python-envs | ms- | 1.16.0 |
| vscode-sort-json | ric | 1.20.0 |
| vscode-sql-template-literal | for | 0.1.0 |
| vscode-tailwindcss | bra | 0.14.29 |
| vscode-test-explorer | hbe | 2.22.1 |
| vsfire | tob | 1.4.1 |
| vshaxe | nad | 2.34.2 |
System Info
| Item | Value |
|---|---|
| CPUs | Apple M4 (10 x 2400) |
| GPU Status | 2d_canvas: enabled GPU0: VENDOR= 0x106b [Google Inc. (Apple)], DEVICE=0x0000 [ANGLE (Apple, ANGLE Metal Renderer: Apple M4, Version 26.2 (Build 25C56))], DRIVER_VENDOR=Apple, DRIVER_VERSION=26.2 ACTIVE Machine model name: Mac Machine model version: 16.13 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 trees_in_viz: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off |
| Load (avg) | 2, 2, 2 |
| Memory (System) | 24.00GB (0.07GB free) |
| Process Argv | --crash-reporter-id 012f170b-434c-4e5e-95e0-9d04fe31a27c |
| Screen Reader | no |
| VM | 0% |
A/B Experiments
vsliv368:30146709
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31436602
aj953862:31281341
6abeh943:31336334
cloudbuttont:31379625
3efgi100_wstrepl:31403338
839jf696:31457053
use-responses-api:31390855
je187915:31401257
ec5jj548:31422691
cmp-ext-treat:31426748
cp_cls_c_966_ss:31454199
ge8j1254_inline_auto_hint_haiku:31431912
nes-autoexp-10:31446583
a5gib710:31434435
38bie571_auto:31461585
rename_enabled:31436409
7a04d226_do_not_restore_last_panel_session:31438103
anthropic_thinking_c:31457102
722j7530_gpt_5_2_codex:31458091
h0hdh950:31428394
preserve_tokens:31444547
cp_cls_c_1081:31454833
copilot-nes-oct-trt:31432596
ia-use-proxy-models-svc:31452481
nes-slash-models-on:31441832
nes-set-to-on:31441941
a43f0574a:31442826
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c0ci8992_validated:31449878
nes-fast-additive:31462666
control_6dc23131:31461115
9c05b404_max_request_50:31461828
edit_mode_hidden:31461530
864ei723_large_tool_results_to_disk:31460878
reg-2ge67640:31455970
nes-extended-on:31455476
chat:31457767
ah:31460422