Mermaid rendering to PDF broken

[sasja-san]

Bug description

I'm not able to render this code to a PDF. The Mermaid code was taken from here: https://quarto.org/docs/authoring/diagrams.html#mermaid

---
title: Mermaid Test
format: pdf
---


# Hello!


```{mermaid}
sequenceDiagram
  participant Alice
  participant Bob
  Alice->>John: Hello John, how are you?
  loop Healthcheck
    John->>John: Fight against hypochondria
  end
  Note right of John: Rational thoughts <br/>prevail!
  John-->>Alice: Great!
  John->>Bob: How about you?
  Bob-->>John: Jolly good!
```

Here's the error I get:

$ quarto render mermaid-test.qmd
ERROR: Internal Error: Couldn't find an svg element in svg string

This is a bug in quarto. We apologize for the inconvenience.
Please consider reporting it at https://github.com/quarto-dev/quarto-cli. Thank you!

Stack trace:
    at resolveSize (file:///home/sasja/.quarto/quarto-cli/src/core/svg.ts:24:11)
    at eventLoopTick (ext:core/01_core.js:175:7)
    at async makePng (file:///home/sasja/.quarto/quarto-cli/src/core/handlers/mermaid.ts:353:11)
    at async makeDefault (file:///home/sasja/.quarto/quarto-cli/src/core/handlers/mermaid.ts:435:16)
    at async Object.cell (file:///home/sasja/.quarto/quarto-cli/src/core/handlers/mermaid.ts:475:14)
    at async Promise.all (index 0)
    at async Object.document (file:///home/sasja/.quarto/quarto-cli/src/core/handlers/base.ts:577:20)
    at async handleLanguageCells (file:///home/sasja/.quarto/quarto-cli/src/core/handlers/base.ts:529:34)
    at async file:///home/sasja/.quarto/quarto-cli/src/command/render/render-files.ts:631:41
    at async withTimingAsync (file:///home/sasja/.quarto/quarto-cli/src/core/timing.ts:50:20)

Quarto check & version

I'm using the latest commit on main branch:

git show -s --format="%as %H"
2024-10-02 9d00acae2607c1d0fae479b0b8f830145454b207

From quarto check:

Quarto 99.9.9
[✓] 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: 9d00acae2607c1d0fae479b0b8f830145454b207
      Path: /home/sasja/.quarto/quarto-cli/package/dist/bin

[✓] Checking tools....................OK
      TinyTeX: v2024.03.13
      Chromium: 869685

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

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

[✓] Checking Python 3 installation....OK
      Version: 3.12.5
      Path: /usr/bin/python3
      Jupyter: 5.7.2
      Kernels: python3

[✓] Checking Jupyter engine render....OK

[✓] Checking R installation...........(None)

      Unable to locate an installed version of R.
      Install R from https://cloud.r-project.org/

[cderv]

Just to share on Windows this is rendering ok for me.

[cscheid]

I also can't repro myself, either on 1.6.18 or main, on macOS.