When we briefly discussed the possible alternatives, I asked "Would you like it to directly die instead?" I wasn't joking. You see the Mojo client does it, and in fact, curl does it too: if you don't display $? automatically in the prompt, check it after the call (curl is helpful enough to show us the exit status it's going to exit with, it's 6). Wrapping all calls to unstable interfaces into a try is a good habit.