error[E0793]: reference to packed field is unaligned
   --> $spack-stage/spack-stage-librsvg-2.51.0-dh25kyl2eni3gzdhzxlm6lkoioz2u6g6/spack-src/vendor/tendril/src/tendril.rs:241:20
    |
241 |                 if (*header).refcount.decrement() == 1 {
    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: fields of packed structs are not properly aligned, and 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)

error[E0793]: reference to packed field is unaligned
   --> $spack-stage/spack-stage-librsvg-2.51.0-dh25kyl2eni3gzdhzxlm6lkoioz2u6g6/spack-src/vendor/tendril/src/tendril.rs:958:9
    |
958 |         (*self.header()).refcount.increment();
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: fields of packed structs are not properly aligned, and 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)