zed-industries/zed · error

Failed to write credentials to Windows Credential Manager: {

Error message

Failed to write credentials to Windows Credential Manager: {}

What it means

Raised in the spawned task of `write_credentials` when the `CredWriteW` call returns a non-zero Win32 error, so the generic credential (username/password for {url}) could not be persisted to Windows Credential Manager. Common underlying codes: ERROR_ACCESS_DENIED, ERROR_NO_SUCH_LOGON_SESSION, or the opaque 0x800706F7 stub error.

Source

Thrown at crates/gpui_windows/src/platform.rs:927

        if password.len() > CRED_MAX_CREDENTIAL_BLOB_SIZE as usize {
            return Task::ready(Err(anyhow!(
                "credential for {url} is {} bytes, which exceeds the Windows Credential Manager limit of {CRED_MAX_CREDENTIAL_BLOB_SIZE} bytes",
                password.len()
            )));
        }
        let password = password.to_vec();
        let mut username = username.encode_utf16().chain(Some(0)).collect_vec();
        let mut target_name = windows_credentials_target_name(url)
            .encode_utf16()
            .chain(Some(0))
            .collect_vec();
        self.foreground_executor().spawn(async move {
            let credentials = CREDENTIALW {
                LastWritten: unsafe { GetSystemTimeAsFileTime() },
                Flags: CRED_FLAGS(0),
                Type: CRED_TYPE_GENERIC,
                TargetName: PWSTR::from_raw(target_name.as_mut_ptr()),
                CredentialBlobSize: password.len() as u32,
                CredentialBlob: password.as_ptr() as *mut _,
                Persist: CRED_PERSIST_LOCAL_MACHINE,
                UserName: PWSTR::from_raw(username.as_mut_ptr()),
                ..CREDENTIALW::default()
            };
            unsafe {
                CredWriteW(&credentials, 0).map_err(|err| {
                    anyhow!(
                        "Failed to write credentials to Windows Credential Manager: {}",
                        err,
                    )
                })?;
            }
            Ok(())
        })
    }

    fn read_credentials(&self, url: &str) -> Task<Result<Option<(String, Vec<u8>)>>> {

View on GitHub (pinned to 9d272b0363)

Solutions

1. Surface the formatted Win32 error (already via {}) to the caller/UI.
2. Check the process has access to the user's logon session credential store.
3. Verify CredentialBlobSize fits CRED_MAX_CREDENTIAL_BLOB_SIZE (guarded separately).
4. Retry after logon session issues; ERROR_NO_SUCH_LOGON_SESSION can be transient in service contexts.

When it happens

Trigger: Thrown at crates/gpui_windows/src/platform.rs:862 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of zed-industries/zed@9d272b0363 (2026-08-20). Data as JSON: /api/errors/922c1c3a8c937e80. Report an issue: GitHub.