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Auto merge of #79804 - tmiasko:improper-ctypes-no-niche, r=pnkfelix
Types with a hidden niche are not known to be non-null Fixes #79787.
This commit is contained in:
bors
commit
07194ffcd2
@ -672,7 +672,7 @@ pub fn transparent_newtype_field<'a, 'tcx>(
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}
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/// Is type known to be non-null?
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crate fn ty_is_known_nonnull<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>, mode: CItemKind) -> bool {
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fn ty_is_known_nonnull<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>, mode: CItemKind) -> bool {
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let tcx = cx.tcx;
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match ty.kind() {
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ty::FnPtr(_) => true,
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@ -685,6 +685,12 @@ crate fn ty_is_known_nonnull<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>, mode: C
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return true;
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}
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// Types with a `#[repr(no_niche)]` attribute have their niche hidden.
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// The attribute is used by the UnsafeCell for example (the only use so far).
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if def.repr.hide_niche() {
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return false;
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}
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for variant in &def.variants {
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if let Some(field) = transparent_newtype_field(cx.tcx, variant) {
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if ty_is_known_nonnull(cx, field.ty(tcx, substs), mode) {
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@ -1,6 +1,7 @@
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// check-pass
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// aux-build:external_extern_fn.rs
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#![crate_type = "lib"]
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#![feature(no_niche)]
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#![warn(clashing_extern_declarations)]
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mod redeclared_different_signature {
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@ -383,3 +384,36 @@ mod unknown_layout {
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}
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}
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}
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mod hidden_niche {
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mod a {
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extern "C" {
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fn hidden_niche_transparent() -> usize;
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fn hidden_niche_transparent_no_niche() -> usize;
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fn hidden_niche_unsafe_cell() -> usize;
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}
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}
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mod b {
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use std::cell::UnsafeCell;
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use std::num::NonZeroUsize;
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#[repr(transparent)]
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struct Transparent { x: NonZeroUsize }
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#[repr(no_niche)]
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#[repr(transparent)]
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struct TransparentNoNiche { y: NonZeroUsize }
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extern "C" {
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fn hidden_niche_transparent() -> Option<Transparent>;
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fn hidden_niche_transparent_no_niche() -> Option<TransparentNoNiche>;
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//~^ WARN redeclared with a different signature
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//~| WARN block uses type `Option<TransparentNoNiche>`, which is not FFI-safe
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fn hidden_niche_unsafe_cell() -> Option<UnsafeCell<NonZeroUsize>>;
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//~^ WARN redeclared with a different signature
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//~| WARN block uses type `Option<UnsafeCell<NonZeroUsize>>`, which is not FFI-safe
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}
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}
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}
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@ -1,5 +1,5 @@
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warning: `clash` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:14:13
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--> $DIR/clashing-extern-fn.rs:15:13
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LL | fn clash(x: u8);
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| ---------------- `clash` previously declared here
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@ -8,7 +8,7 @@ LL | fn clash(x: u64);
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| ^^^^^^^^^^^^^^^^^ this signature doesn't match the previous declaration
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note: the lint level is defined here
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--> $DIR/clashing-extern-fn.rs:4:9
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--> $DIR/clashing-extern-fn.rs:5:9
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LL | #![warn(clashing_extern_declarations)]
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -16,7 +16,7 @@ LL | #![warn(clashing_extern_declarations)]
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found `unsafe extern "C" fn(u64)`
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warning: `extern_link_name` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:52:9
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--> $DIR/clashing-extern-fn.rs:53:9
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LL | / #[link_name = "extern_link_name"]
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LL | | fn some_new_name(x: i16);
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@ -29,7 +29,7 @@ LL | fn extern_link_name(x: u32);
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found `unsafe extern "C" fn(u32)`
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warning: `some_other_extern_link_name` redeclares `some_other_new_name` with a different signature
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--> $DIR/clashing-extern-fn.rs:55:9
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--> $DIR/clashing-extern-fn.rs:56:9
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LL | fn some_other_new_name(x: i16);
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| ------------------------------- `some_other_new_name` previously declared here
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@ -43,7 +43,7 @@ LL | | fn some_other_extern_link_name(x: u32);
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found `unsafe extern "C" fn(u32)`
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warning: `other_both_names_different` redeclares `link_name_same` with a different signature
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--> $DIR/clashing-extern-fn.rs:59:9
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--> $DIR/clashing-extern-fn.rs:60:9
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LL | / #[link_name = "link_name_same"]
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LL | | fn both_names_different(x: i16);
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@ -58,7 +58,7 @@ LL | | fn other_both_names_different(x: u32);
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found `unsafe extern "C" fn(u32)`
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warning: `different_mod` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:72:9
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--> $DIR/clashing-extern-fn.rs:73:9
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|
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LL | fn different_mod(x: u8);
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| ------------------------ `different_mod` previously declared here
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@ -70,7 +70,7 @@ LL | fn different_mod(x: u64);
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found `unsafe extern "C" fn(u64)`
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warning: `variadic_decl` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:82:9
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--> $DIR/clashing-extern-fn.rs:83:9
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LL | fn variadic_decl(x: u8, ...);
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| ----------------------------- `variadic_decl` previously declared here
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@ -82,7 +82,7 @@ LL | fn variadic_decl(x: u8);
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found `unsafe extern "C" fn(u8)`
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warning: `weigh_banana` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:142:13
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--> $DIR/clashing-extern-fn.rs:143:13
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LL | fn weigh_banana(count: *const Banana) -> u64;
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| --------------------------------------------- `weigh_banana` previously declared here
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@ -94,7 +94,7 @@ LL | fn weigh_banana(count: *const Banana) -> u64;
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found `unsafe extern "C" fn(*const three::Banana) -> u64`
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warning: `draw_point` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:171:13
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--> $DIR/clashing-extern-fn.rs:172:13
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LL | fn draw_point(p: Point);
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| ------------------------ `draw_point` previously declared here
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@ -106,7 +106,7 @@ LL | fn draw_point(p: Point);
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found `unsafe extern "C" fn(sameish_members::b::Point)`
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warning: `origin` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:197:13
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--> $DIR/clashing-extern-fn.rs:198:13
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LL | fn origin() -> Point3;
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| ---------------------- `origin` previously declared here
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@ -118,7 +118,7 @@ LL | fn origin() -> Point3;
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found `unsafe extern "C" fn() -> same_sized_members_clash::b::Point3`
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warning: `transparent_incorrect` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:220:13
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--> $DIR/clashing-extern-fn.rs:221:13
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LL | fn transparent_incorrect() -> T;
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| -------------------------------- `transparent_incorrect` previously declared here
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@ -130,7 +130,7 @@ LL | fn transparent_incorrect() -> isize;
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found `unsafe extern "C" fn() -> isize`
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warning: `missing_return_type` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:238:13
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--> $DIR/clashing-extern-fn.rs:239:13
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LL | fn missing_return_type() -> usize;
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| ---------------------------------- `missing_return_type` previously declared here
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@ -142,7 +142,7 @@ LL | fn missing_return_type();
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found `unsafe extern "C" fn()`
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warning: `non_zero_usize` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:256:13
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--> $DIR/clashing-extern-fn.rs:257:13
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LL | fn non_zero_usize() -> core::num::NonZeroUsize;
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| ----------------------------------------------- `non_zero_usize` previously declared here
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@ -154,7 +154,7 @@ LL | fn non_zero_usize() -> usize;
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found `unsafe extern "C" fn() -> usize`
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warning: `non_null_ptr` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:258:13
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--> $DIR/clashing-extern-fn.rs:259:13
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LL | fn non_null_ptr() -> core::ptr::NonNull<usize>;
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| ----------------------------------------------- `non_null_ptr` previously declared here
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@ -166,7 +166,7 @@ LL | fn non_null_ptr() -> *const usize;
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found `unsafe extern "C" fn() -> *const usize`
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warning: `option_non_zero_usize_incorrect` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:356:13
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--> $DIR/clashing-extern-fn.rs:357:13
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|
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LL | fn option_non_zero_usize_incorrect() -> usize;
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| ---------------------------------------------- `option_non_zero_usize_incorrect` previously declared here
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@ -178,7 +178,7 @@ LL | fn option_non_zero_usize_incorrect() -> isize;
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found `unsafe extern "C" fn() -> isize`
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warning: `option_non_null_ptr_incorrect` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:358:13
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--> $DIR/clashing-extern-fn.rs:359:13
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|
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LL | fn option_non_null_ptr_incorrect() -> *const usize;
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| --------------------------------------------------- `option_non_null_ptr_incorrect` previously declared here
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@ -189,5 +189,48 @@ LL | fn option_non_null_ptr_incorrect() -> *const isize;
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= note: expected `unsafe extern "C" fn() -> *const usize`
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found `unsafe extern "C" fn() -> *const isize`
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warning: 15 warnings emitted
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warning: `hidden_niche_transparent_no_niche` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:410:13
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|
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LL | fn hidden_niche_transparent_no_niche() -> usize;
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| ------------------------------------------------ `hidden_niche_transparent_no_niche` previously declared here
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...
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LL | fn hidden_niche_transparent_no_niche() -> Option<TransparentNoNiche>;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this signature doesn't match the previous declaration
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|
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= note: expected `unsafe extern "C" fn() -> usize`
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found `unsafe extern "C" fn() -> Option<TransparentNoNiche>`
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warning: `hidden_niche_unsafe_cell` redeclared with a different signature
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--> $DIR/clashing-extern-fn.rs:414:13
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|
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LL | fn hidden_niche_unsafe_cell() -> usize;
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| --------------------------------------- `hidden_niche_unsafe_cell` previously declared here
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...
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LL | fn hidden_niche_unsafe_cell() -> Option<UnsafeCell<NonZeroUsize>>;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this signature doesn't match the previous declaration
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|
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= note: expected `unsafe extern "C" fn() -> usize`
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found `unsafe extern "C" fn() -> Option<UnsafeCell<NonZeroUsize>>`
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warning: `extern` block uses type `Option<TransparentNoNiche>`, which is not FFI-safe
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--> $DIR/clashing-extern-fn.rs:410:55
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|
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LL | fn hidden_niche_transparent_no_niche() -> Option<TransparentNoNiche>;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
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|
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= note: `#[warn(improper_ctypes)]` on by default
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= help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
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= note: enum has no representation hint
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warning: `extern` block uses type `Option<UnsafeCell<NonZeroUsize>>`, which is not FFI-safe
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--> $DIR/clashing-extern-fn.rs:414:46
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|
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LL | fn hidden_niche_unsafe_cell() -> Option<UnsafeCell<NonZeroUsize>>;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
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|
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= help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
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= note: enum has no representation hint
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warning: 19 warnings emitted
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@ -5,6 +5,7 @@
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extern crate libc;
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|
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use std::cell::UnsafeCell;
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use std::marker::PhantomData;
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|
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trait Bar { }
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@ -70,6 +71,11 @@ extern "C" {
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pub fn transparent_fn(p: TransparentBadFn); //~ ERROR: uses type `Box<u32>`
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pub fn raw_array(arr: [u8; 8]); //~ ERROR: uses type `[u8; 8]`
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pub fn no_niche_a(a: Option<UnsafeCell<extern fn()>>);
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//~^ ERROR: uses type `Option<UnsafeCell<extern "C" fn()>>`
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pub fn no_niche_b(b: Option<UnsafeCell<&i32>>);
|
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//~^ ERROR: uses type `Option<UnsafeCell<&i32>>`
|
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|
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pub static static_u128_type: u128; //~ ERROR: uses type `u128`
|
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pub static static_u128_array_type: [u128; 16]; //~ ERROR: uses type `u128`
|
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|
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|
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@ -1,5 +1,5 @@
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error: `extern` block uses type `Foo`, which is not FFI-safe
|
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--> $DIR/lint-ctypes.rs:47:28
|
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--> $DIR/lint-ctypes.rs:48:28
|
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|
|
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LL | pub fn ptr_type1(size: *const Foo);
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| ^^^^^^^^^^ not FFI-safe
|
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@ -12,13 +12,13 @@ LL | #![deny(improper_ctypes)]
|
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= help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
|
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= note: this struct has unspecified layout
|
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note: the type is defined here
|
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--> $DIR/lint-ctypes.rs:25:1
|
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--> $DIR/lint-ctypes.rs:26:1
|
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|
|
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LL | pub struct Foo;
|
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| ^^^^^^^^^^^^^^^
|
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|
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error: `extern` block uses type `Foo`, which is not FFI-safe
|
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--> $DIR/lint-ctypes.rs:48:28
|
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--> $DIR/lint-ctypes.rs:49:28
|
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|
|
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LL | pub fn ptr_type2(size: *const Foo);
|
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| ^^^^^^^^^^ not FFI-safe
|
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@ -26,13 +26,13 @@ LL | pub fn ptr_type2(size: *const Foo);
|
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= help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
|
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= note: this struct has unspecified layout
|
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note: the type is defined here
|
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--> $DIR/lint-ctypes.rs:25:1
|
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--> $DIR/lint-ctypes.rs:26:1
|
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|
|
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LL | pub struct Foo;
|
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| ^^^^^^^^^^^^^^^
|
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|
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error: `extern` block uses type `[u32]`, which is not FFI-safe
|
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--> $DIR/lint-ctypes.rs:49:26
|
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--> $DIR/lint-ctypes.rs:50:26
|
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|
|
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LL | pub fn slice_type(p: &[u32]);
|
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| ^^^^^^ not FFI-safe
|
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@ -41,7 +41,7 @@ LL | pub fn slice_type(p: &[u32]);
|
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= note: slices have no C equivalent
|
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|
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error: `extern` block uses type `str`, which is not FFI-safe
|
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--> $DIR/lint-ctypes.rs:50:24
|
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--> $DIR/lint-ctypes.rs:51:24
|
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|
|
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LL | pub fn str_type(p: &str);
|
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| ^^^^ not FFI-safe
|
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@ -50,7 +50,7 @@ LL | pub fn str_type(p: &str);
|
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= note: string slices have no C equivalent
|
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|
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error: `extern` block uses type `Box<u32>`, which is not FFI-safe
|
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--> $DIR/lint-ctypes.rs:51:24
|
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--> $DIR/lint-ctypes.rs:52:24
|
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|
|
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LL | pub fn box_type(p: Box<u32>);
|
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| ^^^^^^^^ not FFI-safe
|
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@ -59,7 +59,7 @@ LL | pub fn box_type(p: Box<u32>);
|
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= note: this struct has unspecified layout
|
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|
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error: `extern` block uses type `Option<Box<u32>>`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:52:28
|
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--> $DIR/lint-ctypes.rs:53:28
|
||||
|
|
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LL | pub fn opt_box_type(p: Option<Box<u32>>);
|
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| ^^^^^^^^^^^^^^^^ not FFI-safe
|
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@ -68,7 +68,7 @@ LL | pub fn opt_box_type(p: Option<Box<u32>>);
|
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= note: enum has no representation hint
|
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|
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error: `extern` block uses type `char`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:54:25
|
||||
--> $DIR/lint-ctypes.rs:55:25
|
||||
|
|
||||
LL | pub fn char_type(p: char);
|
||||
| ^^^^ not FFI-safe
|
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@ -77,7 +77,7 @@ LL | pub fn char_type(p: char);
|
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= note: the `char` type has no C equivalent
|
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|
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error: `extern` block uses type `i128`, which is not FFI-safe
|
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--> $DIR/lint-ctypes.rs:55:25
|
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--> $DIR/lint-ctypes.rs:56:25
|
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|
|
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LL | pub fn i128_type(p: i128);
|
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| ^^^^ not FFI-safe
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@ -85,7 +85,7 @@ LL | pub fn i128_type(p: i128);
|
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= note: 128-bit integers don't currently have a known stable ABI
|
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|
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error: `extern` block uses type `u128`, which is not FFI-safe
|
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--> $DIR/lint-ctypes.rs:56:25
|
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--> $DIR/lint-ctypes.rs:57:25
|
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|
|
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LL | pub fn u128_type(p: u128);
|
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| ^^^^ not FFI-safe
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@ -93,7 +93,7 @@ LL | pub fn u128_type(p: u128);
|
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= note: 128-bit integers don't currently have a known stable ABI
|
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|
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error: `extern` block uses type `dyn Bar`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:57:26
|
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--> $DIR/lint-ctypes.rs:58:26
|
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|
|
||||
LL | pub fn trait_type(p: &dyn Bar);
|
||||
| ^^^^^^^^ not FFI-safe
|
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@ -101,7 +101,7 @@ LL | pub fn trait_type(p: &dyn Bar);
|
||||
= note: trait objects have no C equivalent
|
||||
|
||||
error: `extern` block uses type `(i32, i32)`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:58:26
|
||||
--> $DIR/lint-ctypes.rs:59:26
|
||||
|
|
||||
LL | pub fn tuple_type(p: (i32, i32));
|
||||
| ^^^^^^^^^^ not FFI-safe
|
||||
@ -110,7 +110,7 @@ LL | pub fn tuple_type(p: (i32, i32));
|
||||
= note: tuples have unspecified layout
|
||||
|
||||
error: `extern` block uses type `(i32, i32)`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:59:27
|
||||
--> $DIR/lint-ctypes.rs:60:27
|
||||
|
|
||||
LL | pub fn tuple_type2(p: I32Pair);
|
||||
| ^^^^^^^ not FFI-safe
|
||||
@ -119,7 +119,7 @@ LL | pub fn tuple_type2(p: I32Pair);
|
||||
= note: tuples have unspecified layout
|
||||
|
||||
error: `extern` block uses type `ZeroSize`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:60:25
|
||||
--> $DIR/lint-ctypes.rs:61:25
|
||||
|
|
||||
LL | pub fn zero_size(p: ZeroSize);
|
||||
| ^^^^^^^^ not FFI-safe
|
||||
@ -127,26 +127,26 @@ LL | pub fn zero_size(p: ZeroSize);
|
||||
= help: consider adding a member to this struct
|
||||
= note: this struct has no fields
|
||||
note: the type is defined here
|
||||
--> $DIR/lint-ctypes.rs:21:1
|
||||
--> $DIR/lint-ctypes.rs:22:1
|
||||
|
|
||||
LL | pub struct ZeroSize;
|
||||
| ^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: `extern` block uses type `ZeroSizeWithPhantomData`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:61:33
|
||||
--> $DIR/lint-ctypes.rs:62:33
|
||||
|
|
||||
LL | pub fn zero_size_phantom(p: ZeroSizeWithPhantomData);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
|
||||
|
|
||||
= note: composed only of `PhantomData`
|
||||
note: the type is defined here
|
||||
--> $DIR/lint-ctypes.rs:44:1
|
||||
--> $DIR/lint-ctypes.rs:45:1
|
||||
|
|
||||
LL | pub struct ZeroSizeWithPhantomData(::std::marker::PhantomData<i32>);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: `extern` block uses type `PhantomData<bool>`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:64:12
|
||||
--> $DIR/lint-ctypes.rs:65:12
|
||||
|
|
||||
LL | -> ::std::marker::PhantomData<bool>;
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
|
||||
@ -154,7 +154,7 @@ LL | -> ::std::marker::PhantomData<bool>;
|
||||
= note: composed only of `PhantomData`
|
||||
|
||||
error: `extern` block uses type `fn()`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:65:23
|
||||
--> $DIR/lint-ctypes.rs:66:23
|
||||
|
|
||||
LL | pub fn fn_type(p: RustFn);
|
||||
| ^^^^^^ not FFI-safe
|
||||
@ -163,7 +163,7 @@ LL | pub fn fn_type(p: RustFn);
|
||||
= note: this function pointer has Rust-specific calling convention
|
||||
|
||||
error: `extern` block uses type `fn()`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:66:24
|
||||
--> $DIR/lint-ctypes.rs:67:24
|
||||
|
|
||||
LL | pub fn fn_type2(p: fn());
|
||||
| ^^^^ not FFI-safe
|
||||
@ -172,7 +172,7 @@ LL | pub fn fn_type2(p: fn());
|
||||
= note: this function pointer has Rust-specific calling convention
|
||||
|
||||
error: `extern` block uses type `Box<u32>`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:67:28
|
||||
--> $DIR/lint-ctypes.rs:68:28
|
||||
|
|
||||
LL | pub fn fn_contained(p: RustBadRet);
|
||||
| ^^^^^^^^^^ not FFI-safe
|
||||
@ -181,7 +181,7 @@ LL | pub fn fn_contained(p: RustBadRet);
|
||||
= note: this struct has unspecified layout
|
||||
|
||||
error: `extern` block uses type `i128`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:68:32
|
||||
--> $DIR/lint-ctypes.rs:69:32
|
||||
|
|
||||
LL | pub fn transparent_i128(p: TransparentI128);
|
||||
| ^^^^^^^^^^^^^^^ not FFI-safe
|
||||
@ -189,7 +189,7 @@ LL | pub fn transparent_i128(p: TransparentI128);
|
||||
= note: 128-bit integers don't currently have a known stable ABI
|
||||
|
||||
error: `extern` block uses type `str`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:69:31
|
||||
--> $DIR/lint-ctypes.rs:70:31
|
||||
|
|
||||
LL | pub fn transparent_str(p: TransparentStr);
|
||||
| ^^^^^^^^^^^^^^ not FFI-safe
|
||||
@ -198,7 +198,7 @@ LL | pub fn transparent_str(p: TransparentStr);
|
||||
= note: string slices have no C equivalent
|
||||
|
||||
error: `extern` block uses type `Box<u32>`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:70:30
|
||||
--> $DIR/lint-ctypes.rs:71:30
|
||||
|
|
||||
LL | pub fn transparent_fn(p: TransparentBadFn);
|
||||
| ^^^^^^^^^^^^^^^^ not FFI-safe
|
||||
@ -207,7 +207,7 @@ LL | pub fn transparent_fn(p: TransparentBadFn);
|
||||
= note: this struct has unspecified layout
|
||||
|
||||
error: `extern` block uses type `[u8; 8]`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:71:27
|
||||
--> $DIR/lint-ctypes.rs:72:27
|
||||
|
|
||||
LL | pub fn raw_array(arr: [u8; 8]);
|
||||
| ^^^^^^^ not FFI-safe
|
||||
@ -215,8 +215,26 @@ LL | pub fn raw_array(arr: [u8; 8]);
|
||||
= help: consider passing a pointer to the array
|
||||
= note: passing raw arrays by value is not FFI-safe
|
||||
|
||||
error: `extern` block uses type `Option<UnsafeCell<extern "C" fn()>>`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:74:26
|
||||
|
|
||||
LL | pub fn no_niche_a(a: Option<UnsafeCell<extern fn()>>);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 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 `Option<UnsafeCell<&i32>>`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:76:26
|
||||
|
|
||||
LL | pub fn no_niche_b(b: Option<UnsafeCell<&i32>>);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^ 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.rs:73:34
|
||||
--> $DIR/lint-ctypes.rs:79:34
|
||||
|
|
||||
LL | pub static static_u128_type: u128;
|
||||
| ^^^^ not FFI-safe
|
||||
@ -224,12 +242,12 @@ LL | pub static static_u128_type: u128;
|
||||
= note: 128-bit integers don't currently have a known stable ABI
|
||||
|
||||
error: `extern` block uses type `u128`, which is not FFI-safe
|
||||
--> $DIR/lint-ctypes.rs:74:40
|
||||
--> $DIR/lint-ctypes.rs:80:40
|
||||
|
|
||||
LL | pub static static_u128_array_type: [u128; 16];
|
||||
| ^^^^^^^^^^ not FFI-safe
|
||||
|
|
||||
= note: 128-bit integers don't currently have a known stable ABI
|
||||
|
||||
error: aborting due to 24 previous errors
|
||||
error: aborting due to 26 previous errors
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user