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Duplicated quotes when auto-completing string literals, with autoClosingQuotes disabled #25923

@yueyinqiu

Description

@yueyinqiu

Type: Bug

Behaviour

With "editor.autoClosingQuotes": "never", write:

from typing import Literal
x: Literal["x"] = "

It will show an auto-complete suggestion "x" (as expected):

Image

However, when choosing it, the final code includes a duplicated ":

Image

(This won't happen when autoClosingQuotes is enabled.)

Diagnostic data

(There seems no related logs?)


Environment

(The following environment is generated by the issue reporter on a remote device. I have also tested on my local machine (Windows), and it also happens. I believe this issue is unrelated to the environment.)

Extension version: 2026.4.0
VS Code version: Code 1.116.0 (560a9dba96f961efea7b1612916f89e5d5d4d679, 2026-04-15T00:28:13Z)
OS version: Windows_NT x64 10.0.19045
Modes:
Remote OS version: Linux x64 5.15.0-164-generic

  • Python version (& distribution if applicable, e.g. Anaconda):
  • Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Unknown
  • Value of the python.languageServer setting: Default
User Settings


languageServer: "Pylance"

terminal
• activateEnvironment: false

Installed Extensions
Extension Name Extension Id Version
csdevkit ms- 3.10.14
csharp ms- 2.130.5
debugpy ms- 2025.18.0
even-better-toml tam 0.21.2
flake8 ms- 2025.2.0
hexeditor not 1.8.2
js-debug ms- 1.112.0
js-debug-companion ms- 1.1.3
jsts-chat-features Typ 0.0.2
markdown-all-in-one yzh 3.6.3
markdown-mermaid bie 1.32.0
pdf tom 1.2.2
python ms- 2026.4.0
rainbow-csv mec 3.24.1
remote-explorer ms- 0.5.0
remote-ssh ms- 0.122.0
remote-ssh-edit ms- 0.87.0
sqlite-viewer qwt 25.12.2
vscode-dotnet-runtime ms- 3.0.0
vscode-github-actions git 0.31.3
vscode-js-profile-table ms- 1.0.10
vscode-language-pack-zh-hans MS- 1.110.2026041514
vscode-pydata-viewer Per 0.0.15
vscode-pylance ms- 2026.2.1
vscode-python-envs ms- 1.28.0
zip-viewerx Mak 1.0.0
System Info
Item Value
CPUs Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz (8 x 2112)
GPU Status 2d_canvas: enabled
GPU0: VENDOR= 0x8086, DEVICE=0x5917 [Intel(R) UHD Graphics 620], DRIVER_VENDOR=Intel, DRIVER_VERSION=31.0.101.2134 ACTIVE
GPU1: VENDOR= 0x8086, DEVICE=0x5917 [Intel(R) UHD Graphics 620], DRIVER_VERSION=31.0.101.2134
GPU2: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.19041.5794
Machine model name:
Machine model version:
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) undefined
Memory (System) 7.88GB (0.84GB free)
Process Argv --crash-reporter-id f48474c2-14f7-477c-8807-2e8ae5bb3bdd
Screen Reader no
VM 0%
Item Value
Remote SSH: illusion
OS Linux x64 5.15.0-164-generic
CPUs Intel(R) Xeon(R) Gold 6348 CPU @ 2.60GHz (56 x 3400)
Memory (System) 1007.53GB (860.73GB free)
VM 0%
A/B Experiments
vsliv368cf:30146710
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
6abeh943:31336334
envsactivate1:31464700
cloudbuttont:31379625
42190218_ostrepl:31403339
use-responses-api:31390855
ddidtcf:31399634
je187915:31454425
ec5jj548:31422691
cp_cls_c_966_ss:31454199
inlinechat_v2_hd992725:31485760
4je02754:31466945
8hhj4413:31478653
38bie571_auto:31426784
cp_cls_c_1081:31454833
conptydll_false:31489735
e9c30283:31461165
test_treatment2:31471001
idci7584:31464702
e3e4d672:31494082
ei9d7968:31496641
534a6447:31496642
chat:31457767
dfc2j404:31496396
cpptoolson-v2:31475363
ghj88844:31492074
h08i8180_copy:31475368
ec1eg703:31491645
client_tst_t:31495907
ddid_t:31478206
getcmakediagnosticson:31489824
cp_cls_c_1082:31491634
f5b8g904_t:31489328
logging_disabled_new:31493366
748c7209:31497895

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