false Citeproc warning about missing citation

[ThierryO]

Bug description

URLs containing an @ like https://mastodon.online/@inbo result in a false citeproc warning

[WARNING] Citeproc: citation inbo not found

Steps to reproduce

No response

Actual behavior

No response

Expected behavior

No response

Your environment

No response

Quarto check output

Quarto 99.9.9
[✓] Checking environment information...
Quarto cache location: /home/thierry/.cache/quarto
[✓] Checking versions of quarto binary dependencies...
Pandoc version 3.4.0: OK
Dart Sass version 1.70.0: OK
Deno version 1.46.3: OK
Typst version 0.11.0: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
Version: 99.9.9
commit: 3aec7d3
Path: /home/thierry/quarto-cli/package/dist/bin

[✓] Checking tools....................OK
TinyTeX: v2024.12
Chromium: (not installed)

[✓] Checking LaTeX....................OK
Using: TinyTex
Path: /home/thierry/.TinyTeX/bin/x86_64-linux
Version: 2024

[✓] Checking Chrome Headless....................OK
Using: Chrome found on system
Path: /usr/bin/google-chrome
Source: PATH

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
Version: 3.12.3
Path: /usr/bin/python3
Jupyter: 5.3.2
Kernels: python3

(|) Checking Jupyter engine render....Traceback (most recent call last):
File "/home/thierry/quarto-cli/src/resources/jupyter/jupyter.py", line 21, in
from notebook import notebook_execute, RestartKernel
File "/home/thierry/quarto-cli/src/resources/jupyter/notebook.py", line 20, in
from nbclient import NotebookClient
ModuleNotFoundError: No module named 'nbclient'
[✓] Checking Jupyter engine render....OK

[mcanouil]

@ThierryO Thank you for reaching out. To best assist you, we kindly request that you complete the issue template with all necessary information. This will enable us to reproduce the issue and provide a timely and effective solution. Currently, the information provided is insufficient for us to begin troubleshooting. We appreciate your cooperation.

---

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R	Python
````qmd --- title: "Reproducible Quarto Document" format: html engine: knitr --- This is a reproducible Quarto document. {{< lipsum 1 >}} ```{r} x <- c(1, 2, 3, 4, 5) y <- c(1, 4, 9, 16, 25) plot(x, y) ``` {#fig-placeholder} {{< lipsum 1 >}} The end after @fig-placeholder. ````	````qmd --- title: "Reproducible Quarto Document" format: html engine: jupyter --- This is a reproducible Quarto document. {{< lipsum 1 >}} ```{python} import matplotlib.pyplot as plt x = [1, 2, 3, 4, 5] y = [1, 4, 9, 16, 25] plt.plot(x, y) plt.show() ``` {#fig-placeholder} {{< lipsum 1 >}} The end after @fig-placeholder. ````

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---

For reference:

• Citeproc warning when using a Mastodon profile link #3493

[cderv]

Thanks @mcanouil !

To be clear @ThierryO we fixed a similar issue while ago (2d3a5f9) and we may have missed some use case, but we need to know where this URL was provided in Quarto configuration, otherwise we don't know where to look.

[ThierryO]

We use it in the navbar of a html book. The link provides a link to the relevant line in _quarto.yml. The file is part of a working example of a quarto extension.

[cderv]

It seems exactly same usage as initial problem

• Citeproc warning when using a Mastodon profile link #3493

Would it mean this is a regression 🤔 ?

We need to come up with a simple example to reproduce and add as a test project

[mcanouil]

I can't reproduce on a website.

Note that the project is far from a default project.
A book cannot have a navbar but here it has one.
My guess is that the issue comes from the extension rather than Quarto itself.

[ThierryO]

Note that the project is far from a default project.

Yes. This is an extension providing our corporate identity.

A book cannot have a navbar but here it has one.

The documentation says otherwise

[mcanouil]

Indeed, sorry, I missed that, but now I confirm the issue is not Quarto (I mean it produces the right result, but with [WARNING] Citeproc: citation MickaelCanouil not found warning).

1. quarto create project book
2. _quarto.ml

project:
  type: book

book:
  title: "demo"
  author: "Norah Jones"
  date: "2/25/2025"
  navbar:
    pinned: true
    right:
      - text: Mastodon
        href: https://fosstodon.org/@MickaelCanouil
  chapters:
    - index.qmd
    - intro.qmd
    - summary.qmd
    - references.qmd

bibliography: references.bib

format:
  html:
    theme:
      - cosmo
      - brand
  pdf:
    documentclass: scrreprt

[mcanouil]

The warning still not appear in website project, so it might be a Book project oversight from the last fix.

[ThierryO]

I've created a minimal examples without extensions.

_quarto.yml

project:
  type: book

bibliography: references.bib

format:
  html: default

book:
  chapters:
    - index.md
  navbar:
    left:
      - text: Cover
        file: index.md
    right:
      - icon: mastodon
        href: https://mastodon.online/@inbo

index.md

# Abstract {-}

Excerpt on ecology taken from [Wikipedia](https://en.wikipedia.org/wiki/Ecology)

references.bib

@Misc{R-3.0.1,
  Title                    = {{R: A language and environment for statistical computing. Version 3.0.1}},

  Author                   = {{R Core Team}},
  Year                     = {2013},

  Address                  = {Vienna, Austria},
  Publisher                = {R Foundation for Statistical Computing},
  Url                      = {http://www.r-project.org/}
}

Console output of quarto render

pandoc 
  to: html
  output-file: index.html
  standalone: true
  toc: true
  number-sections: false
  section-divs: true
  html-math-method: mathjax
  wrap: none
  default-image-extension: png
  variables: {}
  
metadata
  crossref:
    chapters: true
  document-css: false
  link-citations: true
  date-format: long
  lang: en
  bibliography:
    - references.bib
  
[WARNING] Citeproc: citation inbo not found
Output created: _book/index.html