LeaderfFunction raises IndexError when g:Lf_ReverseOrder is set.

[wangyandongnx]

• vim or neovim?
  • vim
  • neovim
• Output of vim --version or nvim --version:

VIM - Vi IMproved 8.1 (2018 May 18, compiled Feb 18 2019 23:51:40)
macOS version
Included patches: 1-950
Compiled by [email protected]
Huge version with MacVim GUI.  Features included (+) or not (-):
+acl               -farsi             +mouse_sgr         -tag_any_white
+arabic            +file_in_path      -mouse_sysmouse    -tcl
+autocmd           +find_in_path      +mouse_urxvt       +termguicolors
+autochdir         +float             +mouse_xterm       +terminal
-autoservername    +folding           +multi_byte        +terminfo
+balloon_eval      -footer            +multi_lang        +termresponse
+balloon_eval_term +fork()            -mzscheme          +textobjects
+browse            +fullscreen        +netbeans_intg     +textprop
++builtin_terms    -gettext           +num64             +timers
+byte_offset       -hangul_input      +odbeditor         +title
+channel           +iconv             +packages          +toolbar
+cindent           +insert_expand     +path_extra        +transparency
+clientserver      +job               +perl/dyn          +user_commands
+clipboard         +jumplist          +persistent_undo   +vartabs
+cmdline_compl     +keymap            +postscript        +vertsplit
+cmdline_hist      +lambda            +printer           +virtualedit
+cmdline_info      +langmap           +profile           +visual
+comments          +libcall           +python/dyn        +visualextra
+conceal           +linebreak         +python3/dyn       +viminfo
+cryptv            +lispindent        +quickfix          +vreplace
+cscope            +listcmds          +reltime           +wildignore
+cursorbind        +localmap          +rightleft         +wildmenu
+cursorshape       +lua/dyn           +ruby/dyn          +windows
+dialog_con_gui    +menu              +scrollbind        +writebackup
+diff              +mksession         +signs             -X11
+digraphs          +modify_fname      +smartindent       -xfontset
+dnd               +mouse             +startuptime       +xim
-ebcdic            +mouseshape        +statusline        -xpm
+emacs_tags        +mouse_dec         -sun_workshop      -xsmp
+eval              -mouse_gpm         +syntax            -xterm_clipboard
+ex_extra          -mouse_jsbterm     +tag_binary        -xterm_save
+extra_search      +mouse_netterm     +tag_old_static
   system vimrc file: "$VIM/vimrc"
     user vimrc file: "$HOME/.vimrc"
 2nd user vimrc file: "~/.vim/vimrc"
      user exrc file: "$HOME/.exrc"
  system gvimrc file: "$VIM/gvimrc"
    user gvimrc file: "$HOME/.gvimrc"
2nd user gvimrc file: "~/.vim/gvimrc"
       defaults file: "$VIMRUNTIME/defaults.vim"
    system menu file: "$VIMRUNTIME/menu.vim"
  fall-back for $VIM: "/Applications/MacVim.app/Contents/Resources/vim"
Compilation: clang -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_MACVIM -Wall -Wno-unknown-pragmas -pipe  -DMACOS_X -DMACOS_X_DARWIN  -g -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1
Linking: clang   -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl/lib -L/usr/local/opt/readline/lib  -L/usr/local/lib -o Vim -framework Cocoa -framework Carbon       -lm  -lncurses -liconv -framework AppKit   -fstack-protector  -L/System/Library/Perl/5.18/darwin-thread-multi-2level/CORE

• Output of :echo has("python"):

0

• Output of :echo has("python3"):

1

• Output of :echo &pythondll(only vim, not neovim):

/usr/local/Frameworks/Python.framework/Versions/2.7/Python

• Output of :echo &pythonthreedll(only vim, not neovim):

/usr/local/Frameworks/Python.framework/Versions/3.7/Python

• Output of :py print(sys.version):

E836: This Vim cannot execute :python after using :py3
E263: Sorry, this command is disabled, the Python library could not be loaded.

• Output of :py3 print(sys.version):

3.7.3 (default, Mar 27 2019, 09:23:15)
[Clang 10.0.1 (clang-1001.0.46.3)]

• Output of :echo g:Lf_Debug_Cmd:
• Output of :echo g:Lf_FilesFromCache:
• Operating system:
  • Linux
  • Mac OS X
  • Windows
  • Etc.
• Configurations related to LeaderF in vimrc:

Plug 'Yggdroot/LeaderF', { 'do': './install.sh' }

let g:Lf_ReverseOrder = 1

Describe your question, feature request, or bug.

LeaderfFunction raises IndexError when g:Lf_ReverseOrder is set.

Steps to reproduce

1. Example golang code

package main

import (
	"fmt"
)

func hello() {
	fmt.Println("hello")
}

func world() {
	fmt.Println("world")
}

func main() {
	hello()
	world()
}

2. Launch :LeaderfFunction and then press Tab key.
3. Press Down Arrow key cause IndexError

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/Users/wangyandong/.vim/plugged/LeaderF/autoload/leaderf/python/leaderf/functionExpl.py", line 330, in _previewR
esult
    self._acceptSelection(line)
  File "/Users/wangyandong/.vim/plugged/LeaderF/autoload/leaderf/python/leaderf/functionExpl.py", line 230, in _acceptSe
lection
    line = line.rsplit("\t", 1)[1][1:-1]    # file:line buf_number
IndexError: list index out of range

Actual behaviour

IndexError

Expected behaviour

LeaderfFunction should not raise any IndexError.

[Yggdroot]

I can not reproduce this issue.

[Yggdroot]

Reproduced.

[wangyandongnx]

I can not reproduce this issue.

I've tried this in a vagrant machine, and it still gets the IndexError.

vagrant@ubuntu-bionic:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.2 LTS
Release:	18.04
Codename:	bionic
vagrant@ubuntu-bionic:~$ vim --version
VIM - Vi IMproved 8.1 (2018 May 18, compiled May 27 2019 13:46:23)
Included patches: 1-1408
Modified by [email protected]
Compiled by [email protected]
Huge version without GUI.  Features included (+) or not (-):
+acl               +extra_search      +mouse_netterm     -tag_old_static
+arabic            -farsi             +mouse_sgr         -tag_any_white
+autocmd           +file_in_path      -mouse_sysmouse    -tcl
+autochdir         +find_in_path      +mouse_urxvt       +termguicolors
-autoservername    +float             +mouse_xterm       +terminal
-balloon_eval      +folding           +multi_byte        +terminfo
+balloon_eval_term -footer            +multi_lang        +termresponse
-browse            +fork()            -mzscheme          +textobjects
++builtin_terms    +gettext           +netbeans_intg     +textprop
+byte_offset       -hangul_input      +num64             +timers
+channel           +iconv             +packages          +title
+cindent           +insert_expand     +path_extra        -toolbar
-clientserver      +job               -perl              +user_commands
-clipboard         +jumplist          +persistent_undo   +vartabs
+cmdline_compl     +keymap            +postscript        +vertsplit
+cmdline_hist      +lambda            +printer           +virtualedit
+cmdline_info      +langmap           +profile           +visual
+comments          +libcall           -python            +visualextra
+conceal           +linebreak         +python3           +viminfo
+cryptv            +lispindent        +quickfix          +vreplace
+cscope            +listcmds          +reltime           +wildignore
+cursorbind        +localmap          +rightleft         +wildmenu
+cursorshape       -lua               -ruby              +windows
+dialog_con        +menu              +scrollbind        +writebackup
+diff              +mksession         +signs             -X11
+digraphs          +modify_fname      +smartindent       -xfontset
-dnd               +mouse             +startuptime       -xim
-ebcdic            -mouseshape        +statusline        -xpm
+emacs_tags        +mouse_dec         -sun_workshop      -xsmp
+eval              +mouse_gpm         +syntax            -xterm_clipboard
+ex_extra          -mouse_jsbterm     +tag_binary        -xterm_save
   system vimrc file: "$VIM/vimrc"
     user vimrc file: "$HOME/.vimrc"
 2nd user vimrc file: "~/.vim/vimrc"
      user exrc file: "$HOME/.exrc"
       defaults file: "$VIMRUNTIME/defaults.vim"
  fall-back for $VIM: "/usr/share/vim"
Compilation: gcc -c -I. -Iproto -DHAVE_CONFIG_H   -Wdate-time  -g -O2 -fdebug-prefix-map=/build/vim-8Y2wWO/vim-8.1.1408=. -fstack-protector-strong -Wformat -Werror=format-security -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1
Linking: gcc   -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -Wl,--as-needed -o vim        -lm -ltinfo -lnsl  -lselinux  -lacl -lattr -lgpm -ldl     -L/usr/lib/python3.6/config-3.6m-x86_64-linux-gnu -lpython3.6m -lpthread -ldl -lutil -lm

$MYVIMRC

if empty(glob('~/.vim/autoload/plug.vim'))
  silent !curl -fLo ~/.vim/autoload/plug.vim --create-dirs
    \ https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
  autocmd VimEnter * PlugInstall --sync | source $MYVIMRC
endif

call plug#begin('~/.vim/plugged')

Plug 'Yggdroot/LeaderF', { 'do': './install.sh' }

call plug#end()

let g:Lf_ReverseOrder = 1

[Yggdroot]

Fixed.

[wangyandongnx]

Fixed.

Good work!