[BUG] Preview causes "bad set of key/value pairs for associative array"

[abhinav]

Describe the bug

I'm trying to use the preview feature with cd as advised in the README by adding the following:

zstyle ':fzf-tab:complete:cd:*' fzf-preview 'exa -1 --color=always $realpath'

I see the following error inside the preview window:

zsh:9: bad set of key/value pairs for associative array

I can make sure:

• [x] I am using the latest version of fzf-tab
• [x] this is the minimal zshrc which can reproduce this bug
• [x] fzf-tab is loaded after compinit
• [x] fzf-tab is loaded after plugins which will wrap Tab, like junegunn/fzf/completion.zsh
• [x] fzf-tab is loaded before zsh-autosuggestions, zsh-syntax-highlighting and fast-syntax-highlighting.

To Reproduce

1. Set up preview for cd per README
2. Type 'cd ' and press Tab
3. Preview window contains error instead of preview

Expected behavior

Preview window contains a list of files in the directory.

Screenshots

Screen recording 2022-12-18 18.21.29.webm

Environment:

• OS: Arch Linux
• zsh version: 5.9
• fzf version: 0.35.1
• exa version: 0.10.1
• tmux: 3.3a
• LS_COLORS: blank (zstyle ':completion:*' list-colors '')

Minimal zshrc

If applicable, add a minimal zshrc to help us analyze.

[ -f ~/.fzf.zsh ] && source ~/.fzf.zsh

source ~/.zsh/zsh-completions/zsh-completions.plugin.zsh
zstyle ':completion:*' completer _expand _complete _approximate
zstyle ':completion:*' file-sort name
zstyle ':completion:*' ignore-parents parent pwd directory
zstyle ':completion:*:*:-command-:*:*' ignored-patterns '_*'
zstyle ':completion:*' insert-unambiguous true
zstyle ':completion:*' list-colors ''
zstyle ':completion:*' matcher-list '' 'm:{[:lower:]}={[:upper:]}' 'm:{[:lower:][:upper:]}={[:upper:][:lower:]}' 'r:|[._-]=* r:|=* l:|=*'
zstyle ':completion:*' menu select=1
zstyle ':completion:*' original true
zstyle ':completion:*' select-prompt '%SScrolling active: current selection at %p%s'
zstyle :compinstall filename "$HOME/.zsh/rc.d/completion"

autoload -Uz compinit
compinit

source ~/.zsh/fzf-tab/fzf-tab.plugin.zsh
zstyle ':fzf-tab:complete:cd:*' fzf-preview 'exa -1 --color=always $realpath'

Log

zsh-22539-fzf-tab-1.log

---

Just to narrow it down, I added set -x to ftb_preview_init inside lib/-ftb-fzf. That gives me,

+zsh:3> zmodload zsh/mapfile                                                                  │
+zsh:4> local -a _ftb_compcap=( $'bin\C-B<\C-@>\C-@realdir\C-@\C-@args\C-@-Q\C-A-s\C-A\C-A-W\ │
+zsh:5> local -a _ftb_groups=( '' '' )                                                        │
+zsh:6> local bs=$'\C-B'                                                                      │
+zsh:8> export desc=' bin'                                                                    │
+zsh:10> local -A ctxt=( '' )                                                                 │
zsh:10: bad set of key/value pairs for associative array                                      │

ctxt has only one item instead of the two needed for the associative array.