`epoxy_latex()` not rendering LaTeX expression

[snhansen]

Consider this Quarto markdown document:

---
format: html
---

```{r}
#| include: false
library(epoxy)
x <- 2
```

```{epoxy_latex}
#| latex_raw: false
A:
$$
2^{10} = <<2^10>>
$$
```

```{epoxy_latex}
#| latex_raw: false
B:
$$
<<x>>^{10} == <<x^10>>
$$
```

```{epoxy_latex}
#| latex_raw: false
C:
$$
1\cdot<<x>>^{10} = <<x^10>>
$$
```

The second chunk (B) isn't rendered in the output. It seems to be caused by starting the chunk with a <<>> because putting something in front of it solves the issue (C).

[gadenbuie]

Hi @snhansen! It turns out this is actually a bug in knitr. I commented on a relevant issue that independently discovered the same behavior. In your case, the trick you can apply is to make sure that the <<x>> elements aren't ever the first thing on a line:

```{epoxy_latex}
#| latex_raw: false
B:
$$<<x>>^{10} == <<x>>$$
```

[gadenbuie]

With knitr >= 1.48.3 we'll be able to set ref.chunk = FALSE for epoxy_latex chunks. (See linked issue above for details.) I'll work on adding this epoxy soon.

[snhansen]

Great! I just tried the example in the OP with knitr 1.48.3 and the issue has been resolved without setting ref.chunk = FALSE for the chunks. So it seems that minimal fix that was initially committed did the job in this particular case.