rebis-dev: compilation errors

[UWN]

From HEAD is now at 2b1580e1 some fixes in response to miri on, I can no longer build rebis-dev:

error[E0133]: use of mutable static is unsafe and requires unsafe function or block
  --> src/ffi.rs:93:45
   |
93 |             atom!("sint64") => addr_of_mut!(types::sint64),
   |                                             ^^^^^^^^^^^^^ use of mutable static
   |
   = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior

Thus the last compiling commit is HEAD is now at 15789279 Fix parsing of \x0\ in partial strings

[bakaq]

Relevant: #2782

Basically in 1.82 using addr_of_mut! of a mutable static (which is what's happening here) doesn't need unsafe, and so it warns about unneeded unsafe. If you fix that warning though, like was done here in rebis-dev and in #2782, you get this error on versions older than 1.82 because that was illegal.

Technically our Minimal Supported Rust Version is 1.77, so I would consider this a bug, but we should probably bump that some time soon, see #2019. If you want to compile this version of the code then you need to update your Rust version. You can check your current version with rustc --version. If you use Rustup you can run rustup update stable to get the latest stable version.