potential bug: `devtools::document()` errors with hard-to-interpret message

[jacobvjk]

Both @MonikaFu and I get an error when running devtools::document(), althought the messages vary slightly. In neither case are the messages particularly insightful.

My reprex:

devtools::load_all(path = "/path/to/git/r2dii.plot")
#> ℹ Loading r2dii.plot
devtools::document(pkg = "/path/to/git/r2dii.plot")
#> ℹ Updating r2dii.plot documentation
#> ℹ Loading r2dii.plot
#> Error in eval(code, envir = envir) : object 'fun' not found

^{Created on 2025-02-13 with reprex v2.1.0}

Note: I changed my local path to "/path/to/git/r2dii.plot" in this issue

[cjyetman]

Underneath, this is coming from

roxygen2::roxygenise(package.dir = "/path/to/git/r2dii.plot")
#> ℹ Loading r2dii.plot
#> Error in eval(code, envir = envir) : object 'fun' not found

and more specifically, only with the rd files

roxygen2::roxygenise(package.dir = "/path/to/git/r2dii.plot", roclets = "namespace")
#> ℹ Loading r2dii.plot
roxygen2::roxygenise(package.dir = "/path/to/git/r2dii.plot", roclets = "rd")
#> ℹ Loading r2dii.plot
#> Error in eval(code, envir = envir) : object 'fun' not found

I'm digging deeper