wrong common substring in tab completion

[galkk]

In a directory with following files % 1-minimal.sh 2-minimal-config.sh 3-full.sh 4-gui-fonts.sh 4-gui.sh 5-personal.sh 6-personal-gui.sh Dockerfile docker-compose.yml

when entered ./4-, the zsh-autocomplete shows ./4-gui.sh as common substring, while I expect it to be truly common substring: ./4-gui.

Issue reproduces with both my config (that has zstyle ':autocomplete:*' insert-unambiguous yes), and config in "steps to reproduce" section

Environment

❯ typeset -p1 VENDOR OSTYPE ZSH_PATCHLEVEL _autocomplete__funcfiletrace
typeset VENDOR=ubuntu
typeset OSTYPE=linux-gnu
typeset ZSH_PATCHLEVEL=ubuntu/5.8.1-1
typeset -a _autocomplete__funcfiletrace=(
  /home/andy/.znap/marlonrichert/zsh-autocomplete/zsh-autocomplete.plugin.zsh:4
  /home/andy/.zshrc:34
  /home/andy/.znap/znap/functions/.znap.source:37
  /home/andy/.znap/znap/functions/znap:27
  /home/andy/.zshrc:15
  zsh:0
)
❯  git -C ~autocomplete log --oneline -n1
93df12e (grafted, HEAD -> main, origin/main, origin/HEAD) Add `_complete_help` keybinding
<output>

• Operating system:

  > lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 22.04.2 LTS
  Release:    22.04
  Codename:   jammy

• Terminal emulator:

  > kitty -v
  kitty 0.28.1 created by Kovid Goyal

Steps to reproduce

cd $(mktemp -d)
❯  git clone --depth 1 -- https://github.com/marlonrichert/zsh-autocomplete.git
Cloning into 'zsh-autocomplete'...
remote: Enumerating objects: 55, done.
remote: Counting objects: 100% (55/55), done.
remote: Compressing objects: 100% (53/53), done.
remote: Total 55 (delta 0), reused 31 (delta 0), pack-reused 0
Receiving objects: 100% (55/55), 1.64 MiB | 16.76 MiB/s, done.
❯  > .zshrc <<EOF
setopt interactivecomments transientrprompt
PS1='%# '
PS2=
RPS2='%^'
source $PWD/zsh-autocomplete/zsh-autocomplete.plugin.zsh
EOF
❯  env -i HOME=$PWD PATH=$PATH TERM=$TERM ${TERMINFO:+TERMINFO=$TERMINFO} zsh -d

% cd /home/andy/projects/dotfiles/setup 
% ls
1-minimal.sh  2-minimal-config.sh  3-full.sh  4-gui-fonts.sh  4-gui.sh  5-personal.sh  6-personal-gui.sh  Dockerfile  docker-compose.yml
% ./4-
executable file
4-gui-fonts.sh*  4-gui.sh*      
common substring: ./4-gui.sh

Contents of ~autocomplete-log/YYYY-MM-DD.log (click to expand): file is empty

> cat ~autocomplete-log/2023-07-03.log

[marlonrichert]

"Common substring" is not entirely accurate to describe what will be inserted. Rather, it's the longest input that would complete to all listed completion. If you can think of a better phrase to describe this, I'm all ears.

In any case, this is expected behavior in Zsh. See also https://github.com/marlonrichert/zsh-autocomplete/issues/602#issuecomment-1603103847.