error when setting breaks and labels to `NULL` in `coord_radial()`

[Yunuuuu]

library(ggplot2)
pie <- ggplot(mtcars, aes(x = factor(cyl), fill = factor(cyl))) +
    geom_bar(width = 1)
pie + coord_radial(theta = "x", inner.radius = 0.5) +
    scale_x_discrete(breaks = NULL, labels = NULL)
#> Error in switch(params$position, theta.sec = -Inf, top = -Inf, right = -Inf, : EXPR must be a length 1 vector

^{Created on 2024-12-22 with reprex v2.1.0}
~

[teunbrand]

Thanks for the report! It appears that this no longer errors in the current development version. I think it may have been #5838 that had fixed this.

[Yunuuuu]

Thanks

[teunbrand]

Somehow this issue seems to have come back, which probably means we should fix it and include a test to prevent its return.

[r2evans]

FYI, one error I've seen

ggplot(mtcars, aes(mpg, disp)) +
  geom_point() +
  coord_radial() +
  scale_x_continuous(name=NULL, breaks=NULL)
# Error in switch(params$position, theta.sec = -Inf, top = -Inf, right = -Inf,  : 
#   EXPR must be a length 1 vector

[teunbrand]

My bad I was checking with the CRAN version. It does not cause any problems in the development version, so I'll close this again.