Quarto 1.5 - Cannot render grVIz() chart

[equihuam]

Probably related to:
Rstudio: GraphViz dot chunk does not render on chunk run #13187
DiagrammeR: Quarto 1.4 - Cannot render grVIz() chart into HTML #510

I tried this:

---
title: "test grViz on Quarto"
---

## Quarto

```{r}

library(DiagrammeR)

grViz(engine = "dot",
diagram = "
digraph boxes_and_circles {

    # a 'graph' statement
    graph [overlap = true, fontsize = 10]
  
    # several 'node' statements
    node [shape = box,
          fontname = Helvetica]
    A; B; C; D; E; F
  
    node [shape = circle,
          fixedsize = true,
          width = 0.9] // sets as circles
    1; 2; 3; 4; 5; 6; 7; 8
  
    # several 'edge' statements
    A->1 B->2 B->3 B->4 C->A
    1->D E->A 2->4 1->5 1->F
    E->6 4->6 5->7 6->7 3->8
  }
  "

)

```

On chunk run, I get the graph as expected, but on rendering, I got no graph, only this message:

TypeError: Assignment to constant variable.

RStudio specs

platform x86_64-w64-mingw32
arch x86_64
os mingw32
crt ucrt
system x86_64, mingw32
status
major 4
minor 4.3
year 2025
month 02
day 28
svn rev 87843
language R
version.string R version 4.4.3 (2025-02-28 ucrt)
nickname Trophy Case

Quarto version: 1.5.57

DiagrammeR version: 1.0.11

loading reports:

Registered S3 methods overwritten by 'htmltools':
method from
print.html tools:rstudio
print.shiny.tag tools:rstudio
print.shiny.tag.list tools:rstudio
Registered S3 method overwritten by 'htmlwidgets':
method from
print.htmlwidget tools:rstudio

[marleenbaum]

Hihi,
a quick and dirty way to solve this: convert the graph to png, and include the png in the html file instead:

g <- grViz(…)
grVizToImageFile(g, filename = "FileName")

(![PictureName](FileName.png)