Behavior

When I type in fish-shell and trigger fish's auto complementation, such error happens randomly:

thread '<unnamed>' panicked at src/history/file.rs:372:5:
assertion failed: line.starts_with(b"- cmd")
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
fish crashed, please report a bug.
fish: Job 1, 'fish' terminated by signal SIGABRT (Abort)

Environment

• fish version: 4.0.0

• os version: NixOS 25.05

• installed plugin:

  • tide 6.1.1

Reproduce

I haven't found a method to reproduce crashing stablely

1. Open two fish shell
2. Type sleep 10 in first shell and enter
3. Type something in another shell
4. Second shell might crash