Show an underlying reason on file opening (#44664)

Based on the debug attempt from
https://github.com/zed-industries/zed/issues/44370

Release Notes:

- N/A
717d898692Kirill Bulatov committed on 12/11/2025, 11:20:25 PM· committed by GitHubparent1cd7563
2 files changedLine totals unavailable