Expecting number (Time::Format::Error)
0x4d43ab: *CallStack::unwind:Array(Pointer(Void)) at ??
0x6491b9: value_or_raise at /usr/lib/crystal/concurrent/future.cr 0:7
0x649083: get at /usr/lib/crystal/concurrent/future.cr 29:5
0x4b7281: __crystal_main at /usr/lib/crystal/array.cr 130:9
0x4c76f9: main at /usr/lib/crystal/main.cr 12:15
0x7fa20d719511: __libc_start_main at ??
0x4b607a: _start at ??
0x0: ??? at ??