Microsoft/vscode

Git "sync" fails when ssh config has "VisualHostKey=yes"

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#247,862 opened on Apr 30, 2025

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 (2 comments) (0 reactions) (1 assignee)TypeScript (74,848 stars) (10,221 forks)batch import
buggithelp wanted

Description

Type: Bug

Steps to repro:

  1. On windows, create/update the ssh config file at "C:/users/[username]/.ssh/config" -> add this line at the top: "VisualHostKey=yes"
  2. Open a git folder that uses ssh
  3. make a new commit and try to "sync" git by clicking on the bottom bar sync button
  4. fail

When VisualHostKey is set to yes, it shows a visual representation of the host public SSH key (randomart). This additional output is probably messing up with the internal vscode git scripts

VS Code version: Code 1.99.3 (17baf841131aa23349f217ca7c570c76ee87b957, 2025-04-15T23:18:46.076Z) OS version: Windows_NT x64 10.0.26100 Modes:

Item Value
CPUs 12th Gen Intel(R) Core(TM) i7-1270P (16 x 2496)
GPU Status 2d_canvas: enabledcanvas_oop_rasterization: enabled_ondirect_rendering_display_compositor: disabled_off_okgpu_compositing: enabledmultiple_raster_threads: enabled_onopengl: enabled_onrasterization: enabledraw_draw: disabled_off_okskia_graphite: disabled_offvideo_decode: enabledvideo_encode: enabledvulkan: disabled_offwebgl: enabledwebgl2: enabledwebgpu: enabledwebnn: disabled_off
Load (avg) undefined
Memory (System) 31.44GB (4.02GB free)
Process Argv --crash-reporter-id ce57f2be-b793-472d-b129-e0fe4dd0360d
Screen Reader no
VM 0%
Extension Author (truncated) Version
better-comments aar 3.0.2
loremipsum aro 3.1.0
markdown-emoji bie 0.3.1
markdown-preview-github-styles bie 2.1.0
gltf-vscode ces 2.5.1
vscode-opennewinstance chr 0.0.15
path-intellisense chr 2.10.0
gitignore cod 0.10.0
vscode-markdownlint Dav 0.59.0
vscode-eslint dba 3.0.10
vscode-hasher dee 1.0.1
xslt-xpath del 1.6.6
api-blueprint-viewer dev 0.9.4
lunatic-file-picker Dmi 0.1.2
docker doc 0.6.0
githistory don 0.6.20
xml Dot 2.5.1
math-on-all-numbers Dyl 0.0.4
vscode-html-css ecm 2.0.13
EditorConfig Edi 0.17.2
LogFileHighlighter emi 3.4.0
json-tools eri 1.0.2
prettier-vscode esb 11.0.0
url-encode fle 1.1.0
auto-close-tag for 0.5.15
auto-rename-tag for 0.1.10
vscode-github-actions git 0.27.1
randomeverything hel 0.0.3
reg ion 1.1.0
apib Jar 0.0.2
json-escaper jos 1.1.2
base64 m4n 1.0.0
rainbow-csv mec 3.19.0
git-graph mhu 1.30.0
gitignore mic 1.0.1
ecdc mit 1.8.0
vscode-docker ms- 1.29.6
csdevkit ms- 1.18.25
csharp ms- 2.72.34
vscode-dotnet-runtime ms- 2.3.3
vscodeintellicode-csharp ms- 2.2.3
debugpy ms- 2025.6.0
python ms- 2025.4.0
vscode-pylance ms- 2025.4.1
remote-wsl ms- 0.99.0
hexeditor ms- 1.11.1
powershell ms- 2025.0.0
remote-explorer ms- 0.4.3
remote-server ms- 1.5.2
copy-json-path nid 0.4.0
octo Ora 0.0.19
vscode-auto-scroll pej 1.2.0
material-icon-theme PKi 5.21.2
pico8-ls Pol 0.5.7
java red 1.41.1
vscode-sort-json ric 1.20.0
vscode-statusbar-json-path ric 2.0.0
LiveServer rit 5.7.9
auto-reload seb 0.0.2
svg-preview Sim 2.8.3
code-spell-checker str 4.0.47
code-spell-checker-portuguese-brazilian str 2.2.3
pdf tom 1.2.2
vscode-input-sequence tom 0.2.0
vscode-pets ton 1.31.0
sort-lines Tyr 1.12.0
pico8-simple-outline unr 0.3.2
highlight-matching-tag vin 0.11.0
intellicode-api-usage-examples Vis 0.2.9
vscodeintellicode Vis 1.3.2
insertnums vol 0.10.1
vscode-gradle vsc 3.16.4
vscode-java-debug vsc 0.58.2
vscode-java-dependency vsc 0.24.1
vscode-java-pack vsc 0.29.0
vscode-java-test vsc 0.43.1
vscode-maven vsc 0.44.0
volar Vue 2.2.10
change-case wma 1.0.0
cursor-align yo1 2.1.1
markdown-all-in-one yzh 3.6.3
material-theme zhu 3.19.0

(2 theme extensions excluded)

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Contributor guide

Tech stack
typescript
Domain
desktopdeveloper experiencetooling
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
blocked
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Familiarity with Git and SSH configurationBasic TypeScript knowledgeUnderstanding of VS Code's built in Git support
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
Investigate how VS Code parses git output during sync operations. Look at the git extension's code, particularly files that handle git command output like `git status`, `git push`, etc. The issue suggests that extra output from SSH (randomart) is not filtered out, causing the sync to fail. Find where the git command output is processed and ensure that any non git output like SSH host key art is stripped or ignored. Consider adding a filter for SSH output or checking the exit code instead of parsing standard output.