Summary
A Git operation that requires credentials fails when its interactive credential flow runs in the sandbox. Git Credential Manager attempts to start its Avalonia-based macOS UI, but Avalonia cannot start the native render timer and aborts. Subsequent credential and askpass fallbacks also fail, leaving Git without valid credentials.
What happened
The credential request produced the following sequence:
- Avalonia threw
System.InvalidOperationException: Avalonia.Native was not able to start the RenderTimer. Native error code is: -6661 while initializing the Git Credential Manager UI.
git-credential-manager get terminated with signal 6.- A fallback attempted to create a temporary file under macOS's
/var/folders/.../T directory and failed with Operation not permitted.
- An Electron credential/askpass path reported a macOS
SecCodeCheckValidity error.
- The operation ended with
Missing or invalid credentials and Missing pipe.
The -6661 value corresponds to CoreVideo's invalid-argument error and occurs when Avalonia cannot create a display render timer, such as when no usable active display is available in a headless, sleeping-display, remote, VM, or restricted sandbox context. Although the sandbox command sets TMPDIR, the failing macOS-side helper uses its own process environment and macOS temporary directory.
Summary
A Git operation that requires credentials fails when its interactive credential flow runs in the sandbox. Git Credential Manager attempts to start its Avalonia-based macOS UI, but Avalonia cannot start the native render timer and aborts. Subsequent credential and askpass fallbacks also fail, leaving Git without valid credentials.
What happened
The credential request produced the following sequence:
System.InvalidOperationException: Avalonia.Native was not able to start the RenderTimer. Native error code is: -6661while initializing the Git Credential Manager UI.git-credential-manager getterminated with signal 6./var/folders/.../Tdirectory and failed withOperation not permitted.SecCodeCheckValidityerror.Missing or invalid credentialsandMissing pipe.The
-6661value corresponds to CoreVideo's invalid-argument error and occurs when Avalonia cannot create a display render timer, such as when no usable active display is available in a headless, sleeping-display, remote, VM, or restricted sandbox context. Although the sandbox command setsTMPDIR, the failing macOS-side helper uses its own process environment and macOS temporary directory.