Diff View Internal Error: Could not fetch revision numbers between the revisions: ancestor(default, .), .

Issue and Steps to Reproduce

1. Launch Atom editor on Windows 7, open a mercurial repo project folder
2. Open Nuclide home screen
3. Click "Diff View" "TRY IT" button (the Diff View pane will open with an empty diff)
4. Close the Diff View pane

Expected Behavior

No error.

Actual Behavior

An error pops up saying:

Diff View Internal Error
Could not fetch revision numbers between the revisions: ancestor(default, .), .

Versions

• Atom: 1.7.3
• Nuclide: 0.135.0
• Client OS: Windows 7 x64
• Server OS (optional): —

Additional Details

• Installed packages (apm ls --installed):

Community Packages (50) C:\Users\\\user\.atom\packages
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
└── [email protected]

└── (empty)