Odd compiler warning #1340
Description
I just upgraded to v0.11.0 from 0.10.something. I now get this compiler warning:
warning: `extern` block uses type `NodeTag`, which is not FFI-safe
--> src/cfuncs/bindings.rs:11:16
|
11 | index: Relation,
| ^^^^^^^^ not FFI-safe
|
= note: this enum is non-exhaustive
= note: `#[warn(improper_ctypes)]` on by default
on this code:
extern "C" {
pub fn rdb_read_page(
index: Relation,
blkno: u32,
lock_type: ::std::os::raw::c_int,
pg_buffer: *mut u32,
) -> *mut ::std::os::raw::c_char;
}
This points to a function I wrote in C to read/write pages in an index relation.
This warning is a bit odd, because NodeTag doesn't appear in the method signature and I don't know why Relation would not be ffi-safe.
I've been using this code successfully for quite a while now.