Vim(let):E684: list index out of range: 1 for missing comma in bibliography

[Svalorzen]

Description

In the middle of a bunch of updates to my latex project I suddenly started receiving the error Vim(let):E684: list index out of range: 1, with no explanation or cause to it.

I started debugging it, and after a very long time, I traced it to a missing comma inside one of my bibliography entries. I'm not sure whether the ergonomics of such an issue can be improved, but I thought of reporting this anyway.

Relevant last part of log when running with vim -V9:

49   if b:vimtex.compiler.silence_next_callback
50     call vimtex#log#set_silent_restore()
51     let b:vimtex.compiler.silence_next_callback = 0
52   endif
53  
54   call vimtex#qf#open(0)
55   silent! call s:output.resume()
   endfunction
  1: /usr/share/vim/vimrc
  2: /usr/share/vim/vim90/debian.vim
  3: /usr/share/vim/vim90/syntax/syntax.vim
  ...
181: ~/.vim/bundle/vimtex/autoload/vimtex/jobs/vim.vim
182: ~/.vim/bundle/vimtex/autoload/vimtex/qf/u.vim
183: ~/.vim/bundle/vimtex/autoload/vimtex/qf/biblatex.vim
VimTeX: Something went wrong when parsing log files!
        Vim(let):E684: List index out of range: 1
Error detected while processing function <SNR>111_callback_continuous_output[6]..<SNR>111_check_callback[4]..vimtex#compiler#callback:
line   55:
E121: Undefined variable: s:output

Steps to reproduce

vimtex config:

let g:vimtex_enabled=1
" We use latex for tex
let g:tex_flavor = 'latex'
let g:vimtex_compiler_latexmk = {
    \ 'build_dir' : 'build'
\}

main.tex:

\documentclass[twoside,10pt]{book}

\usepackage[bibencoding=utf8,style=ieee]{biblatex}
\addbibresource{bibl.bib}

\begin{document}

Abc \cite{art}

\printbibliography

\end{document}

bibl.bib:

@article{art,
  author = {someone},
  title = {title}
  booktitle = {book}
}

Expected behavior

Some way to figure out that there is a problem in the bibliography, maybe?

Actual behavior

Random error from Vim which was also (at least for me) fairly untraceable to anything.

Do you use a latexmkrc file?

No

VimtexInfo

System info:
  OS: Ubuntu 22.04.1 LTS
  Vim version: VIM 9.0 (1-749)
  Has clientserver: true
  Servername: undefined (vim started without --servername)

VimTeX project: thesis
  base: thesis.tex
  root: /home/svalorzen/Tests/latex
  tex: /home/svalorzen/Tests/latex/thesis.tex
  main parser: current file verified
  document class: book
  packages: biblatex blx-case-expl3 etoolbox expl3 iftex ifthen infwarerr keyval kvoptions kvsetkeys logreq ltxcmds pdftexcmds url xparse
  compiler: latexmk
    engine: -pdf
    options:
      -verbose
      -file-line-error
      -synctex=1
      -interaction=nonstopmode
    build_dir: build
    callback: 1
    continuous: 1
    executable: latexmk
    job: 
      jobid: process 75731 run
      output: /tmp/vzi8uOy/0
      cmd: max_print_line=2000 latexmk -verbose -file-line-error -synctex=1 -interaction=nonstopmode -pdf -outdir=build -pvc -view=none -e '$compiling_cmd = ($compiling_cmd ? $compiling_cmd . " ; " : "") . "echo vimtex_compiler_callback_compiling"' -e '$success_cmd = ($success_cmd ? $success_cmd . " ; " : "") . "echo vimtex_compiler_callback_success"' -e '$failure_cmd = ($failure_cmd ? $failure_cmd . " ; " : "") . "echo vimtex_compiler_callback_failure"' 'thesis.tex'
      pid: 75731
  viewer: General
    job: 
      pid: 75735
      cmd: xdg-open '/home/svalorzen/Tests/latex/build/thesis.pdf'
  qf method: LaTeX logfile

[lervag]

In the middle of a bunch of updates to my latex project I suddenly started receiving the error Vim(let):E684: list index out of range: 1, with no explanation or cause to it.

Thanks for the good issue report. I've reproduced the bug and I believe it is fixed. Please test and report.

vimtex config:

let g:vimtex_enabled=1
" We use latex for tex
let g:tex_flavor = 'latex'
let g:vimtex_compiler_latexmk = {
    \ 'build_dir' : 'build'
\}

You don't need let g:vimtex_enabled = 1, nor let g:tex_flavor = ... - both of these lines can safely be removed.

I started debugging it, and after a very long time, I traced it to a missing comma inside one of my bibliography entries. I'm not sure whether the ergonomics of such an issue can be improved, but I thought of reporting this anyway.

After I've fixed this, your example yields the following errors in the quickfix window:

I believe the final entry here should be quite helpful in figuring out the problem.

[Svalorzen]

Seems to work well, thank you for the quick fix!

[lervag]

Glad to hear it :)