error[E0793]: reference to packed field is unaligned
    --> ~/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tendril-0.4.1/src/tendril.rs:1028:23
     |
1028 |         let content = &mut (*self.header()).refcount;
     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: packed structs are only aligned by one byte, and many modern architectures penalize unaligned field accesses
     = note: creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
     = help: copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers)