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Showing content from https://github.com/JuliaInterop/JuliaCall/issues/209 below:

remove usage of opts_current$set as it errors with knitr 1.44 and breaks using JuliaCall with plots · Issue #209 · JuliaInterop/JuliaCall · GitHub

Hi,

knitr 1.44 has a change that make JuliaCall throw an error and not work when there is plots. An update should be done so that JuliaCall does correctly call knitr internal feature.

It seems you are using opts_current$set for one feature
https://github.com/Non-Contradiction/JuliaCall/blob/c05473bea78a0197c639f7e82ab1c6f2e943e1cc/R/RMarkdown.R#L56C1-L60

opts_current was always an object maint to be read-only - in knitr 1.44 it was enforce by throwing an error. This was announced in https://yihui.org/en/2023/09/knitr-1-44/

Since it seems it was in fact really used by some package author, there is a mechanism to unlock the environment and allow modification. This aims to be an escape hatch until package author can implement there feature without this opts_current$set
This is described in the blog post.

I'll try to do a PR with at least the escape hatch, but possibly it would be good later on to change the usage.

• Unable to plot using Julia via JuliaCall quarto-dev/quarto-cli#7055
• opts_current locking in 1.44 is breaking JuliaCall yihui/knitr#2295
• opts_current$set should error yihui/knitr#1798

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