Shiny with Quarto "Error parsing args at position 0: ..."

[radovan-miletic]

Hi Quarto Dev Team & Quarto Community,

When running a Shiny example:

---
title: "Old Faithful"
format: html
server: shiny
---

```{r}
sliderInput("bins", "Number of bins:", 
            min = 1, max = 50, value = 30)
plotOutput("distPlot")
```

```{r}
#| context: server
output$distPlot <- renderPlot({
  x <- faithful[, 2]  # Old Faithful Geyser data
  bins <- seq(min(x), max(x), length.out = input$bins + 1)
  hist(x, breaks = bins, col = 'darkgray', border = 'white')
})
```

Immediately an error is thrown:

ERROR: TypeError: Error parsing args at position 0: invalid length 0, expected struct StatArgs with 2 elements

I'm wondering if I'm the only one getting this error or has anyone else noticed this happening?

I'm using R-4.2.0 for Windows (2022-04-22 ucrt), Quarto (v0.9 Build 403), RStudio daily build (2022.06.0-daily-405) and {rmarkdown} (v2.14).
Any help or advice is appreciated. Thank you!

[jjallaire]

This is a bug we seem to have introduced a couple of weeks ago (thanks for reporting!). It's fixed here (1d049e2) and available in the updated release v0.9.405 (https://github.com/quarto-dev/quarto-cli/releases/tag/v0.9.405)

[radovan-miletic]

Runs smoothly now. Thank you for quick fix!