fisher: `fisher update` hangs forever due to suspended curl

If I run fisher update, it spins forever. Looking at my terminal info, it appears there’s a command fish -c curl --max-time 5 -sS 'https://raw.githubusercontent.com/fisherman/fisherman/master/fisher.fish?1507689886' > /Users/me/.config/fish/functions/fisher.fish.1507689886 that’s suspended. If I send this SIGCONT the update continues (and if I was updating a single plugin it finishes, otherwise it just spawns more suspended curls).

This is with fisherman version 2.13.2 and fish version 2.6.0-676-ga136bbda in Terminal.app on macOS 10.13 (17A405)