fix(zsh): move 'fc -RI' inside command substitution

[LangLangBart]

description

• hotfix for fix(zsh): history loading with shared option #4071

When the selection of ⌃R is aborted with Escape, the widget assigned to the ↑ (up arrow key), which is by default up-line-or-history, ignores any input.

I don't have an explanation for why this occurs, and why it only happens in combination with the -I flag on the fc builtin command.

Moving it inside the command substitution alleviates the issue.

Related widget with fc -RI usage:
https://zsh.org/mla/users/2021/msg00186.html

---

to reproduce the issue

1. Start a new session and paste the following:

test-widget() {
	fc -RI
}
zle -N test-widget

bindkey '^p' test-widget
bindkey '^[[A' up-line-or-history

2. Press ⌃P.
3. Press ↑; notice that nothing happens.

The issue doesn't occur in an environment where the HISTFILE is undefined or the assigned file is empty.

[LangLangBart]

I don't have an explanation for why this occurs, and why it only happens in combination with the -I flag on the fc builtin command.

The issue doesn't occur in an environment where the HISTFILE is undefined or the assigned file is empty.

No satisfying explanation found! Giving up for now to find one.

[junegunn]

That's strange, probably a zsh bug. Anyway, thanks!