When trying to import a snapshot on a fresh install, I encounter this problem (Mac OS Mojave):
May 25 21:33:02 - shell.snapshots: Setting history-mode to full
tezos-node: internal error, uncaught exception:
(Failure "Invalid argument")
Raised at file "src/core/lwt.ml", line 2998, characters 20-29
Called from file "src/unix/lwt_main.ml", line 26, characters 8-18
Called from file "src/bin_node/node_snapshot_command.ml", line 70, characters 10-26
Called from file "cmdliner_term.ml", line 25, characters 19-24
Called from file "cmdliner.ml", line 25, characters 27-34
Called from file "cmdliner.ml", line 116, characters 32-39