warning: unused return value of `alloc::ffi::c_str::CString::from_raw` that must be used
   --> regex-capi/src/rure.rs:261:17
    |
261 |                 CString::from_raw(ptr);
    |                 ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: `#[warn(unused_must_use)]` on by default
    = note: call `drop(from_raw(ptr))` if you intend to drop the `CString`

warning: unused return value of `alloc::ffi::c_str::CString::from_raw` that must be used
   --> regex-capi/src/rure.rs:627:18
    |
627 |         unsafe { CString::from_raw(s); }
    |                  ^^^^^^^^^^^^^^^^^^^^^
    |
    = note: call `drop(from_raw(ptr))` if you intend to drop the `CString`

warning: `rure` (lib) generated 2 warnings