Without dies_on_error:
# on successful call f(...); # [200, "OK"] # on non-successful call f(...); # [404, "Not found"]
With dies_on_error=>1:
# on successful call f(...); # [200, "OK"] # on non-successful call f(...); # dies with message "Call f() failed with 404 status: Not found"
This property sets so that function dies when result status is a non-successful one (it even dies under wrapping option trap=>1). Successful statuses by default include 2xx and 304.
