Unexpected error about center/boundary in geom_histogram() when bins = 1

[teunbrand]

The following error is confusing, as we haven't specified any boundary:

library(ggplot2)

ggplot(mpg, aes(displ)) +
  geom_histogram(bins = 1, center = 0)
#> Warning: Computation failed in `stat_bin()`.
#> Caused by error in `bin_breaks_width()`:
#> ! Only one of `boundary` and `center` may be specified.

Inversely, when using the boundary argument, no such error is raised.

ggplot(mpg, aes(displ)) +
  geom_histogram(bins = 1, boundary = 0)

^{Created on 2024-05-13 with reprex v2.1.0}

I think it is due to this line that populates a boundary argument, which then conflicts with center.

ggplot2/R/bin.R

Lines 117 to 120 in 54cbb98

	} else if (bins == 1) {
	width <- diff(x_range)
	boundary <- x_range[1]
	} else {