Assertion fails when using Alt-J on last line

[howard36]

Summary

When the cursor is on the last line of a file (the very last line, which is always empty and has ~ as the line number) and Alt-J is pressed, Helix panics with the following error:

thread 'main' panicked at 'assertion failed: !ranges.is_empty()', helix-core/src/selection.rs:527:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Reproduction Steps

I tried this:

1. hx
2. j
3. Alt-J

I expected this to happen:
No changes or edits.

Instead, this happened:
Helix panics with error

thread 'main' panicked at 'assertion failed: !ranges.is_empty()', helix-core/src/selection.rs:527:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Asciinema recording: https://asciinema.org/a/DMVeqQHNtvFWGxBvR7YrK7GMZ

Helix log

No new messages were logged in ~/.cache/helix/helix.log while performing the above steps.

Platform

Linux

Terminal Emulator

kitty 0.26.5

Helix Version

helix 22.12