(dir-rm-cwd-cd) begin
(dir-rm-cwd-cd) mkdir "a"
(dir-rm-cwd-cd) chdir "a"
(dir-rm-cwd-cd) remove "/a" (must not crash)
(dir-rm-cwd-cd) chdir "/a" (remove succeeded so this must return false)
(dir-rm-cwd-cd) end
--OR--
(dir-rm-cwd-cd) begin
(dir-rm-cwd-cd) mkdir "a"
(dir-rm-cwd-cd) chdir "a"
(dir-rm-cwd-cd) remove "/a" (must not crash)
(dir-rm-cwd-cd) chdir "/a" (remove failed so this must succeed)
(dir-rm-cwd-cd) end