Crash after using save selection -> smart tab on a new line

[Omnikar]

Summary

For context, I have made an insert mode binding of "tab" = ["save_selection", "smart_tab"] so that I can use C-o to go back if I smart tab out too many times. I have encountered this crash as described in the reproduction steps detailed below.

Reproduction Steps

1. Bind "tab" = ["save_selection", "smart_tab"] in insert mode as described above.
2. Open a new buffer.
3. Enter either of the following key sequences:

• o<tab><esc>
• i<ret><tab><esc>

Helix crashes with the following error message:

thread 'main' panicked at 'Positions [(2, Before)] are out of range for changeset len 1!', helix-core/src/transaction.rs:461:9

Helix log

Nothing of note was produced in the log file (with -vv).

Platform

MacOS

Terminal Emulator

iTerm2 3.5.0beta11

Helix Version

helix 23.05 (e1a9f6e0)

[pascalkuthe]

cc @dead10ck

[dead10ck]

Hmm, that's strange, I'll look into this. At first glance, I'm not sure how smart tab could be involved here; all it's doing is moving the cursor. I wouldn't expect it to be any different than, e.g., moving with the arrow keys.

[pascalkuthe]

The problem is probably save_selection not working in insert_mode. That seems like the typical "commands assume there is a revision/don't work with insert mode crash

[Omnikar]

Right, I forgot to clarify that I did test it without the save_selection binding and it didn't crash.