fish_prompt event function doesn't have an updated $history variable

[naelstrof]

Description:
When attempting to access the last command in a fish_prompt-event-driven function: it gets the second to last command instead. This makes abbreviating "!!" not work properly.

Steps to Reproduce:
Place the following in ~/.config/fish/config.fish

function -e fish_prompt onprompt
    set -U fish_user_abbreviations "!!=$history[1]"
end

Then try typing !!, followed by a space. Then witness that instead of being replaced by the last command, !! is replaced by the second-to-last command.

Additional Information:
I'm guessing the fish_prompt event is launched before the variable $history is updated.

[zanchey]

Yes, others have noticed this too. Does #984 describe things adequately?

[naelstrof]

Oops. Yes it does. Feel free to close this.