How to reproduce:
1. Create a new project
2. Install the "High Definition RP" package from the Package Manager (Window > Package Manager)
3. In the Project window select Packages/HDRP/Runtime/Materials/Lit/Lit.shader
4. In the inspector, enable "Preprocess only" and disable "Strip #line directives"
5. Hit the small triangle next to "Compile and show code" to expand the menu and select "All platforms"
6. Click "Compile and Show Code"

Expected result: There is a warning ("file too large to preprocess"), or the file ends with <stripped> at the end, or the file grows as big as needed and contains all data
Actual result: On Windows code randomly stops being printed mid-line, on Mac errors appear in the Console "Cannot write content to" and the file is empty

Reproducible with: 12.0.0 (2021.2.0a4, 2022.1.0a6)
Not reproducible with: 11.0.0 (2021.1.18f1, 2021.2.0a3), 10.6.0 (2020.3.17f1)
Could not test with: 2019.4.30f1 (option "Preprocess only" is missing)

Notes:
- Seems to only happen when the preprocessed file is close to or above 2GB, on Windows this files' size is 2,097,153KB.
- By using “Current graphics device” and “Current build platform” options, instead of "All platforms", file size is smaller and code does not stop randomly.
- In the 11.0.0 version and below preprocessed "Lit.shader" is significantly smaller in size than in the 12.0.0 version and this issue does not happen.