lnav missbehaves with some readline settings

[YasserKa]

lnav version: 0.12.2

Some options in readline [1] make lnav misbehave. Note that this happens in Zsh as well even though it doesn't use readline.

All examples are in inputrc

• This crashes lnav after pressing ;

set editing-mode vi
set show-mode-in-prompt on

• This shows the behavior below

set editing-mode vi
set show-mode-in-prompt on
set vi-ins-mode-string \1\e[6 q\2
set vi-cmd-mode-string \1\e[2 q\2

I press :123456789123456789 nothing appears in the command bar until 23456789, so :1234567891 aren't visible (same thing if I start with ;). I press <escape> and what I see 232 q:123456789123456789. If I press <enter> I get ✘ error: unknown command - 123456789123456789 which is to be expected, but command bar don't seem to behave properly.

[1] https://wiki.archlinux.org/title/Readline

[tstack]

Ultimately, support for vi mode is not something I'm going to support. It's entirely possible readline will be replaced at some point anyhow.

[YasserKa]

Thank you for the clarification. I have bindings for effective editing & navigation based on Emacs readline [1], and disabling show-mode-in-prompt solves the issue. If readline support is removed, I hope the replaced solution is able to replicate this workflow.

[1] https://readline.kablamo.org/emacs.html