error: bash: bind: -X: invalid option

[thisadamis]

When I hit control r I get the following error:

bash: bind: -X: invalid option

I have bash 4.2. Any ideas why this is happening?

[curusarn]

Hi, I use bind -X to set up the keybindings in bash. It is a feature available in bash 4.3 an up.

What distro are you using? I chose to use the bind -X feature because even very old Ubuntu (LTS 16.04 xenial) comes with at least bash 4.3.

MacOS comes with older bash (3.2) but zsh is the default shell since Catalina so the bash version should not matter. Alternatively, newer bash can be installed using brew on MacOS.