Unique<T> is now considered FFI-safe

Author: eduardosm

src/test/ui/lint/lint-ctypes-enum.rs

@@ -67,7 +67,6 @@ extern "C" {
    fn option_fn(x: Option<extern "C" fn()>);
    fn nonnull(x: Option<std::ptr::NonNull<u8>>);
    fn unique(x: Option<std::ptr::Unique<u8>>);
-   //~^ ERROR `extern` block uses type `Option<Unique<u8>>`
    fn nonzero_u8(x: Option<num::NonZeroU8>);
    fn nonzero_u16(x: Option<num::NonZeroU16>);
    fn nonzero_u32(x: Option<num::NonZeroU32>);

src/test/ui/lint/lint-ctypes-enum.stderr

@@ -54,33 +54,24 @@ LL | |     G,
 LL | | }
    | |_^
 
-error: `extern` block uses type `Option<Unique<u8>>`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:69:17
-   |
-LL |    fn unique(x: Option<std::ptr::Unique<u8>>);
-   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
-   |
-   = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
-   = note: enum has no representation hint
-
 error: `extern` block uses type `u128`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:75:23
+  --> $DIR/lint-ctypes-enum.rs:74:23
    |
 LL |    fn nonzero_u128(x: Option<num::NonZeroU128>);
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
    |
    = note: 128-bit integers don't currently have a known stable ABI
 
 error: `extern` block uses type `i128`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:82:23
+  --> $DIR/lint-ctypes-enum.rs:81:23
    |
 LL |    fn nonzero_i128(x: Option<num::NonZeroI128>);
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
    |
    = note: 128-bit integers don't currently have a known stable ABI
 
 error: `extern` block uses type `Option<TransparentUnion<NonZeroU8>>`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:87:28
+  --> $DIR/lint-ctypes-enum.rs:86:28
    |
 LL |    fn transparent_union(x: Option<TransparentUnion<num::NonZeroU8>>);
    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
@@ -89,7 +80,7 @@ LL |    fn transparent_union(x: Option<TransparentUnion<num::NonZeroU8>>);
    = note: enum has no representation hint
 
 error: `extern` block uses type `Option<Rust<NonZeroU8>>`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:89:20
+  --> $DIR/lint-ctypes-enum.rs:88:20
    |
 LL |    fn repr_rust(x: Option<Rust<num::NonZeroU8>>);
    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
@@ -98,13 +89,13 @@ LL |    fn repr_rust(x: Option<Rust<num::NonZeroU8>>);
    = note: enum has no representation hint
 
 error: `extern` block uses type `Result<(), NonZeroI32>`, which is not FFI-safe
-  --> $DIR/lint-ctypes-enum.rs:90:20
+  --> $DIR/lint-ctypes-enum.rs:89:20
    |
 LL |    fn no_result(x: Result<(), num::NonZeroI32>);
    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
    |
    = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
    = note: enum has no representation hint
 
-error: aborting due to 9 previous errors
+error: aborting due to 8 previous errors