line information for errors with inline chunks is incorrect

[kevinushey]

Consider a file with the contents:

---
title: "Title"
format: html
---

This is some text.

This is a line with an inline chunk, which errors. `r print(ouch)`

This is some more text.

If I knit this document with knitr::knit("example.Rmd"), I see:

processing file: example.Rmd
  |......................................................................| 100%Error:
! object 'ouch' not found
Backtrace:
 1. base::print(ouch)



Quitting from lines 2-10 (example.Rmd)
                                                                                          
Execution halted

The lines for the error printed, "Quitting from lines 2-10 (example.Rmd)", are rather non-specific. Would it be possible to better report the line where this error occurred?

Also, as an aside: is it expected that the "Error:" printout here is placed on the same line as the progress bar?

> xfun::session_info('knitr')
R version 4.4.2 (2024-10-31)
Platform: aarch64-apple-darwin20
Running under: macOS Sequoia 15.2

Locale: en_US.UTF-8 / en_US.UTF-8 / en_US.UTF-8 / C / en_US.UTF-8 / en_US.UTF-8

Package version:
  evaluate_1.0.1  graphics_4.4.2  grDevices_4.4.2 highr_0.11
  knitr_1.49.3    methods_4.4.2   stats_4.4.2     tools_4.4.2
  utils_4.4.2     xfun_0.50       yaml_2.3.10

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[kevinushey]

Interestingly, the error line appears to be correct if there is a real chunk used before the inline chunk, e.g.

---
title: "Title"
format: html
---

This is some text.

```{r}
#| label: hello-world
print(1 + 1)
```

This is a line with an inline chunk, which errors. `r print(ouch)`

This is some more text.

which gives

> knitr::knit("example.Rmd")


processing file: example.Rmd
Warning: Duplicated chunk option(s) 'label' in both chunk header and pipe comments of the chunk 'hello-world'.
  |........................................................| 100%              Error:
! object 'ouch' not found
Backtrace:
 1. base::print(ouch)

Quitting from lines 13-15 (example.Rmd)

although then I see the strange spurious warning regarding a duplicated label?

[yihui]

Would it be possible to better report the line where this error occurred?

I think this is doable, and I'll do it. Actually I have already done it in litedown:

---
title: "Title"
format: html
---

This is some text.

This is a line with an inline chunk, which errors. `{r} print(ouch)`

This is some more text.

> litedown::fuse('test.Rmd')
Error in eval(expr, fuse_env()) : object 'ouch' not found
Quitting from test.Rmd#8:53-8:67

The line/column numbers of the inline code will be printed (and in RStudio, users can click on the message to go to the exact location of the inline code).

Also, as an aside: is it expected that the "Error:" printout here is placed on the same line as the progress bar?

Currently it is, but I agree it will look better if the error message starts on a new line.

although then I see the strange spurious warning regarding a duplicated label?

That's a bug. I just fixed it. Thanks!

[yihui]

All done.

> knitr::knit('example.Rmd')


processing file: example.Rmd
  |................................................................| 100%

Error:
! object 'ouch' not found
Backtrace:
 1. base::print(ouch)

Quitting from lines 8-8 (example.Rmd)

[kevinushey]

Awesome -- thanks @yihui!