Attempted to Leave Type `linked_hashmap::Node<_>` Uninitialized

[johnwstanford]

When I follow the build instructions and run the executable, I get the following panic. This is on Ubuntu 21.04 with Rust 1.58.

thread 'main' panicked at 'attempted to leave type `linked_hash_map::Node<primitives::hash::H256, db::kv::transaction::KeyState<chain::block_header::BlockHeader>>` uninitialized, which is invalid', /home/john/.cargo/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.4.2/src/lib.rs:174:52
stack backtrace:
   0: rust_begin_unwind
             at /rustc/db9d1b20bba1968c1ec1fc49616d4742c1725b4b/library/std/src/panicking.rs:498:5
   1: core::panicking::panic_fmt
             at /rustc/db9d1b20bba1968c1ec1fc49616d4742c1725b4b/library/core/src/panicking.rs:107:14
   2: core::panicking::panic
             at /rustc/db9d1b20bba1968c1ec1fc49616d4742c1725b4b/library/core/src/panicking.rs:48:5
   3: core::mem::uninitialized
             at /rustc/db9d1b20bba1968c1ec1fc49616d4742c1725b4b/library/core/src/mem/mod.rs:676:9
   4: linked_hash_map::LinkedHashMap<K,V,S>::ensure_guard_node
             at /home/john/.cargo/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.4.2/src/lib.rs:174:52
   5: linked_hash_map::LinkedHashMap<K,V,S>::insert
             at /home/john/.cargo/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.4.2/src/lib.rs:305:9
   6: lru_cache::LruCache<K,V,S>::insert
             at /home/john/.cargo/registry/src/github.com-1ecc6299db9ec823/lru-cache-0.1.1/src/lib.rs:119:23
   7: <db::kv::cachedb::CacheDatabase<T> as db::kv::db::KeyValueDatabase>::write
             at ./db/src/kv/cachedb.rs:27:6
   8: db::block_chain_db::BlockChainDatabase<T>::insert
             at ./db/src/block_chain_db.rs:306:3
   9: <db::block_chain_db::BlockChainDatabase<T> as storage::block_chain::BlockChain>::insert
             at ./db/src/block_chain_db.rs:684:3
  10: pzec::util::init_db
             at ./pzec/util.rs:34:4
  11: pzec::commands::start::start
             at ./pzec/commands/start.rs:87:2
  12: pzec::run
             at ./pzec/main.rs:71:8
  13: pzec::main
             at ./pzec/main.rs:48:20
  14: core::ops::function::FnOnce::call_once
             at /rustc/db9d1b20bba1968c1ec1fc49616d4742c1725b4b/library/core/src/ops/function.rs:227:5