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Windows: Server fails to start when username contains spaces (EPIPE error) #2
Description
Activity
Confirmed the root cause and shipped a fix in 0.16.2 (released today).
shell: trueon Windows routes the binary path throughcmd.exe, which splits on the unquoted space inC:\Users\Muhammad Daniyal\.... The fix wraps the path in double quotes when on Windows:const command = isWindows ? `"${serverModule}"` : serverModule; const serverOptions: ServerOptions = { command, args: [], transport: TransportKind.stdio, options: { shell: isWindows, cwd: context.extensionPath }, };
VS Code Marketplace publish is in flight — once 0.16.2 lands (usually 15-30 minutes after marketplace acceptance), VS Code should auto-update on the next restart. If you want to verify before then, download the VSIX directly from the GitHub release and install via "Install from VSIX..." in the Extensions panel.
Thanks for the very clean bug report — the repro, the root cause, and a working PoC in one issue is exactly what made this a 5-minute fix. Closing once the marketplace publish is confirmed.
0.16.3 is now live on the VS Code Marketplace and npm.
VS Code extension: https://marketplace.visualstudio.com/items?itemName=aStudioPlus.codegraph
npm:npm install -g @astudioplus/codegraph-mcp@0.16.3The Windows path-quoting fix shipped in 0.16.2 (commit 932ad0b) and is included in 0.16.3.
VS Code should auto-update on the next window reload. If you want to confirm immediately, check the "CodeGraph" output channel — the Language Server start should succeed and you should not see the EPIPE error.
Thanks again for the precise repro and the clear root-cause analysis.
Bug Description
The CodeGraph Language Server fails to start on Windows when the
username contains spaces. The server binary path is not quoted,
causing Windows to split the path at the space.
Environment
Error Message
From the CodeGraph Language Server output panel:
'c:\Users\Muhammad' is not recognized as an internal or external command,
operable program or batch file.
[Error] Client CodeGraph Language Server: connection to server is erroring.
write EPIPE
[Error] Server initialization failed.
Message: write EPIPE
Code: -32099
[Error] The CodeGraph Language Server server crashed 5 times in the last
3 minutes. The server will not be restarted.
Root Cause
In
extension.js, the functionS_()resolves the binary path usingr.asAbsolutePath()which returns:C:\Users\Muhammad Daniyal.vscode\extensions\astudioplus.codegraph-0.14.0\bin\codegraph-server-win32-x64.exe
When this path is passed to the shell without quotes, Windows treats
Muhammadas the command andDaniyal\...as a separate argument,causing the EPIPE crash.
Proof
The binary works perfectly when called with quotes:
& "C:\Users\Muhammad Daniyal.vscode\extensions\astudioplus.codegraph-0.14.0\bin\codegraph-server-win32-x64.exe" --version
// Output: codegraph-server 0.14.0
Suggested Fix
In the server launch configuration, ensure the binary path is quoted:
// Current (broken)
command: a // unquoted path with spaces
// Fixed
command:
"${a}"// quoted pathOR set shell: true with proper escaping:
options: { shell: true }
// and ensure the command string wraps the path in quotes
Impact
This affects ALL Windows users whose username contains a space,
which is extremely common (e.g. "John Doe", "Muhammad Daniyal").
The extension is completely non-functional for these users.
Workarounds Attempted
real path through junction, same error
None of these work because the path is hardcoded via
r.asAbsolutePath()internally.