agg_png() gives a warning when specifying all of width, height, units, and res

[ilarischeinin]

This seems really odd, but agg_png() fails for me (with error message the condition has length > 1) when I specify a value for all of width, height, units, and res, but not if I leave out one of them.

Below is a reprex. Whenever the message is "quartz_off_screen" and there is no visible plot, the function worked. But when it fails for the last case, the plot appears here as it didn't go into a file.

library(ragg)

agg_png("foobar.png"); plot(1:10); dev.off()
#> quartz_off_screen 
#>                 2
agg_png("foobar.png", units = "px", res = 72); plot(1:10); dev.off()
#> quartz_off_screen 
#>                 2
agg_png("foobar.png", width = 480, height = 480); plot(1:10); dev.off()
#> quartz_off_screen 
#>                 2
agg_png("foobar.png", width = 480, height = 480, units = "px"); plot(1:10); dev.off()
#> quartz_off_screen 
#>                 2
agg_png("foobar.png", width = 480, height = 480, res = 72); plot(1:10); dev.off()
#> quartz_off_screen 
#>                 2
agg_png("foobar.png", width = 480, units = "px", res = 72); plot(1:10); dev.off()
#> quartz_off_screen 
#>                 2
agg_png("foobar.png", height = 480, units = "px", res = 72); plot(1:10); dev.off()
#> quartz_off_screen 
#>                 2
agg_png("foobar.png", width = 480, height = 480, units = "px", res = 72); plot(1:10); dev.off()
#> Error in if (deparse(sys.call()) == "dev(filename = filename, width = dim[1], height = dim[2], ...)") {: the condition has length > 1

#> null device 
#>           1

^{Created on 2019-07-15 by the reprex package (v0.3.0)}

Edit: condition has length > 1 is of course normally a warning and not an error. I thought reprex::reprex() runs as vanilla, but apparently it obeys my ~/.Renviron where I have this line:
_R_CHECK_LENGTH_1_CONDITION_ = true. I updated the title of the issue, as the function does work, but just gives out a warning when all the listed parameters are specified in the function call.