Caught panic during handling of "/swarming.ExternalScheduler/AssignTasks": Vector &vector.Vector{Values:[]float64(nil), XXX_NoUnkeyedLiteral:struct {}{}, XXX_unrecognized:[]uint8(nil), XXX_sizecache:0} had length 0 instead of 3.
at go.chromium.org/luci/common/runtime/paniccatcher.Catch (catch.go:41)
at panic (go/src/runtime/panic.go:491)
at infra/qscheduler/qslib/types/vector.assertLen (vector.go:67)
at infra/qscheduler/qslib/types/vector.Vector.At (vector.go:60)
at infra/qscheduler/qslib/types/account.NextBalance (account.go:64)
at infra/qscheduler/qslib/scheduler.(*Scheduler).UpdateTime (scheduler.go:152)
at infra/qscheduler/qslib/reconciler.(*State).AssignTasks (reconciler.go:117)
at infra/appengine/qscheduler-swarming/app/frontend.(*QSchedulerServerImpl).AssignTasks.func1 (qscheduler.go:70)