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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/self/arbitrary-self-types-not-object-safe.object_safe_for_dispatch.stderr | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/self/arbitrary-self-types-not-object-safe.object_safe_for_dispatch.stderr')
-rw-r--r-- | src/test/ui/self/arbitrary-self-types-not-object-safe.object_safe_for_dispatch.stderr | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/self/arbitrary-self-types-not-object-safe.object_safe_for_dispatch.stderr b/src/test/ui/self/arbitrary-self-types-not-object-safe.object_safe_for_dispatch.stderr new file mode 100644 index 000000000..a74752cf8 --- /dev/null +++ b/src/test/ui/self/arbitrary-self-types-not-object-safe.object_safe_for_dispatch.stderr @@ -0,0 +1,22 @@ +error[E0038]: the trait `Foo` cannot be made into an object + --> $DIR/arbitrary-self-types-not-object-safe.rs:33:13 + | +LL | fn foo(self: &Rc<Self>) -> usize; + | --------- help: consider changing method `foo`'s `self` parameter to be `&self`: `&Self` +... +LL | let x = Rc::new(5usize) as Rc<dyn Foo>; + | ^^^^^^^^^^^^^^^ `Foo` cannot be made into an object + | +note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety> + --> $DIR/arbitrary-self-types-not-object-safe.rs:8:18 + | +LL | trait Foo { + | --- this trait cannot be made into an object... +LL | fn foo(self: &Rc<Self>) -> usize; + | ^^^^^^^^^ ...because method `foo`'s `self` parameter cannot be dispatched on + = note: required because of the requirements on the impl of `CoerceUnsized<Rc<dyn Foo>>` for `Rc<usize>` + = note: required by cast to type `Rc<dyn Foo>` + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0038`. |