forking fork failing

bash-3.2$ cargo watch -x 'test replay_stage_correctness'
[Running cargo test replay_stage_correctness]
    Finished dev [unoptimized + debuginfo] target(s) in 3.94s
     Running target/debug/deps/solana-0d9433813e2adc81

running 1 test
thread 'solana-replay-stage' panicked at 'attempt to subtract with overflow', src/replay_stage.rs:72:24
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
   1: std::sys_common::backtrace::print
   2: std::panicking::default_hook::{{closure}}
   3: std::panicking::default_hook
   4: std::panicking::rust_panic_with_hook
   5: std::panicking::continue_panic_fmt
   6: rust_begin_unwind
   7: core::panicking::panic_fmt
   8: core::panicking::panic
   9: solana::replay_stage::ReplayStage::entries_to_blocks
  10: solana::replay_stage::ReplayStage::process_entries
  11: solana::replay_stage::ReplayStage::new::{{closure}}
test replay_stage::test::test_vote_error_replay_stage_correctness ... FAILED

failures:

---- replay_stage::test::test_vote_error_replay_stage_correctness stdout ----
thread 'replay_stage::test::test_vote_error_replay_stage_correctness' panicked at 'Expected to recieve an
 entry on the ledger writer receiver: RecvError', libcore/result.rs:1009:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
   1: std::sys_common::backtrace::print
   2: std::panicking::default_hook::{{closure}}
   3: std::panicking::default_hook
   4: std::panicking::rust_panic_with_hook
   5: std::panicking::continue_panic_fmt
   6: rust_begin_unwind
   7: core::panicking::panic_fmt
   8: core::result::unwrap_failed
   9: <core::result::Result<T, E>>::expect
  10: solana::replay_stage::test::test_vote_error_replay_stage_correctness
  11: solana::replay_stage::test::test_vote_error_replay_stage_correctness::{{closure}}
  12: core::ops::function::FnOnce::call_once
  13: <F as alloc::boxed::FnBox<A>>::call_box
  14: __rust_maybe_catch_panic


failures:
    replay_stage::test::test_vote_error_replay_stage_correctness