Loading ZQ1 persistence panics on leader selection

[mauromedda]

Loading ZQ1 persistence panics on leader selection because the loaded state does not contain any stake for the ZQ2 nodes, whereas ZQ2 enforces the invariant of validators having non-zero stake.

Error:
thread 'tokio-runtime-worker' panicked at zilliqa/src/consensus.rs:1682:69: called Option::unwrap()on aNonevalue stack backtrace: 0: rust_begin_unwind at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:645:5 1: core::panicking::panic_fmt at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panicking.rs:72:14 2: core::panicking::panic at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panicking.rs:127:5 3: core::option::Option<T>::unwrap at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/option.rs:931:21 4: zilliqa::consensus::Consensus::leader::{{closure}} at ./project/zilliqa/src/consensus.rs:1682:69 5: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &mut F>::call_once at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:305:13 6: core::option::Option<T>::map at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/option.rs:1072:29 7: <core::iter::adapters::map::Map<I,F> as core::iter::traits::iterator::Iterator>::next at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/iter/adapters/map.rs:103:26 8: rand::distributions::weighted_index::WeightedIndex<X>::new at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/rand-0.8.5/src/distributions/weighted_index.rs:103:35 9: zilliqa::consensus::Consensus::leader at ./project/zilliqa/src/consensus.rs:1681:20 10: zilliqa::consensus::Consensus::timeout at ./project/zilliqa/src/consensus.rs:464:22 11: zilliqa::node::Node::handle_timeout at ./project/zilliqa/src/node.rs:235:43 12: zilliqa::node_launcher::NodeLauncher::start_shard_node::{{closure}} at ./project/zilliqa/src/node_launcher.rs:146:21 13: zilliqa::p2p_node::P2pNode::add_shard_node::{{closure}}::{{closure}} at ./project/zilliqa/src/p2p_node.rs:175:57 14: tokio::runtime::task::core::Core<T,S>::poll::{{closure}} at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/core.rs:328:17 15: tokio::loom::std::unsafe_cell::UnsafeCell<T>::with_mut at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/loom/std/unsafe_cell.rs:16:9 16: tokio::runtime::task::core::Core<T,S>::poll at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/core.rs:317:13 17: tokio::runtime::task::harness::poll_future::{{closure}} at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/harness.rs:485:19 18: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panic/unwind_safe.rs:272:9 19: std::panicking::try::do_call at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40 20: std::panicking::try at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19 21: std::panic::catch_unwind at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14 22: tokio::runtime::task::harness::poll_future at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/harness.rs:473:18 23: tokio::runtime::task::harness::Harness<T,S>::poll_inner at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/harness.rs:208:27 24: tokio::runtime::task::harness::Harness<T,S>::poll at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/harness.rs:153:15 25: tokio::runtime::task::raw::RawTask::poll at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/raw.rs:201:18 26: tokio::runtime::task::LocalNotified<S>::run at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/mod.rs:427:9 27: tokio::runtime::scheduler::multi_thread::worker::Context::run_task::{{closure}} at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/scheduler/multi_thread/worker.rs:576:18 28: tokio::runtime::coop::with_budget at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/coop.rs:107:5 29: tokio::runtime::coop::budget at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/coop.rs:73:5 30: tokio::runtime::scheduler::multi_thread::worker::Context::run_task at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/scheduler/multi_thread/worker.rs:575:9 31: tokio::runtime::scheduler::multi_thread::worker::Context::run at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/scheduler/multi_thread/worker.rs:526:24 32: tokio::runtime::scheduler::multi_thread::worker::run::{{closure}}::{{closure}} at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/scheduler/multi_thread/worker.rs:491:21 33: tokio::runtime::context::scoped::Scoped<T>::set at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/context/scoped.rs:40:9 34: tokio::runtime::context::set_scheduler::{{closure}} at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/context.rs:176:26 35: std::thread::local::LocalKey<T>::try_with at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/thread/local.rs:270:16 36: std::thread::local::LocalKey<T>::with at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/thread/local.rs:246:9 37: tokio::runtime::context::set_scheduler at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/context.rs:176:17 38: tokio::runtime::scheduler::multi_thread::worker::run::{{closure}} at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/scheduler/multi_thread/worker.rs:486:9 39: tokio::runtime::context::runtime::enter_runtime at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/context/runtime.rs:65:16 40: tokio::runtime::scheduler::multi_thread::worker::run at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/scheduler/multi_thread/worker.rs:478:5 41: tokio::runtime::scheduler::multi_thread::worker::Launch::launch::{{closure}} at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/scheduler/multi_thread/worker.rs:447:45 42: <tokio::runtime::blocking::task::BlockingTask<T> as core::future::future::Future>::poll at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/blocking/task.rs:42:21 43: tokio::runtime::task::core::Core<T,S>::poll::{{closure}} at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/core.rs:328:17 44: tokio::loom::std::unsafe_cell::UnsafeCell<T>::with_mut at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/loom/std/unsafe_cell.rs:16:9 45: tokio::runtime::task::core::Core<T,S>::poll at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/core.rs:317:13 46: tokio::runtime::task::harness::poll_future::{{closure}} at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/harness.rs:485:19 47: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panic/unwind_safe.rs:272:9 48: std::panicking::try::do_call at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40 49: std::panicking::try at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19 50: std::panic::catch_unwind at ./rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14 51: tokio::runtime::task::harness::poll_future at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/harness.rs:473:18 52: tokio::runtime::task::harness::Harness<T,S>::poll_inner at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/harness.rs:208:27 53: tokio::runtime::task::harness::Harness<T,S>::poll at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/harness.rs:153:15 54: tokio::runtime::task::raw::poll at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/raw.rs:271:5 55: tokio::runtime::task::raw::RawTask::poll at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/raw.rs:201:18 56: tokio::runtime::task::UnownedTask<S>::run at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/task/mod.rs:464:9 57: tokio::runtime::blocking::pool::Task::run at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/blocking/pool.rs:159:9 58: tokio::runtime::blocking::pool::Inner::run at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/blocking/pool.rs:513:17 59: tokio::runtime::blocking::pool::Spawner::spawn_thread::{{closure}} at ./cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.37.0/src/runtime/blocking/pool.rs:471:13 note: Some details are omitted, run withRUST_BACKTRACE=full for a verbose backtrace. {"timestamp":"2024-04-03T10:35:47.242753Z","level":"ERROR","fields":{"e":"task 5 panicked"},"target":"zilliqa::p2p_node","line_number":376}