Deleting last path component on Linux can result in URL with empty path

[ahoppen]

var url = URL(fileURLWithPath: "/whatever/test.swift")
print("'\(url.path)'") // prints '/whatever/test.swift'
url.deleteLastPathComponent()
print("'\(url.path)'") // prints '/whatever'
url.deleteLastPathComponent()
print("'\(url.path)'") // prints ''

url = URL(fileURLWithPath: "/test.swift")
print("'\(url.path)'") // prints '/test.swift'
url.deleteLastPathComponent()
print("'\(url.path)'") // prints '/'

Where it prints '' at the end of the first section, I think it should print /.

This is in a Swift 6.0 Linux docker image.