Panic with multiple selection in long line when hitting enter in insert mode

[peter9477]

tempx.txt

Summary

With the attached file when I try multiselecting all text DEBUG, switch to insert mode and hit Enter helix panics in ropey-1.6.1.

Note: md5sum of attached file is ad25ba989d3281257b72181902f3b9dc

Reproduction Steps

I tried this:

1. hx tempx.txt (the attached file)
2. %sDEBUG to select all instances of DEBUG in the line
3. <Enter>i<Enter>

I expected this to happen: split the line into 3

Instead, this happened:

thread 'main' panicked at /home/username/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ropey-1.6.1/src/slice.rs:360:41:
called `Result::unwrap()` on an `Err` value: Char index out of bounds: char index 212, Rope/RopeSlice char length 187
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Helix log

~/.cache/helix/helix.log

Nothing is added to the log file when I do this.  (If I 'rm' the log and reproduce the crash the log is created, zero length.)

Platform

Debian 12 via WSL2

Terminal Emulator

WSL2

Installation Method

Built with cargo build -r

Helix Version

helix 25.1 (dabfb6c)

[peter9477]

This may be the same as #10497 but the exact message is different so maybe not. (Upon reading further I see later comments in that issue with the same error message, so these are the same, but as mine has a 100% reproduction I'll leave it to others to decide how to handle this one.)

[nik-rev]

Try the latest releat 25.01.1 where this should be fixed

[the-mikedavis]

Yep this looks like a duplicate of #12495 and should be fixed in the 25.01.1 release

[peter9477]

Try the latest releat 25.01.1 where this should be fixed

Confirmed! Thank you.