Adding upstream version 1.68.2+dfsg1.upstream/1.68.2+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 59 insertions, 0 deletions

diff --git a/tests/ui/lang-items/lang-item-generic-requirements.rs b/tests/ui/lang-items/lang-item-generic-requirements.rs
new file mode 100644
index 000000000..3d33adf68
--- /dev/null
+++ b/tests/ui/lang-items/lang-item-generic-requirements.rs
@@ -0,0 +1,59 @@
+// Checks that declaring a lang item with the wrong number of generic arguments errors rather than
+// crashing (issue #83474, #83893, #87573, part of #9307, #79559).
+
+#![feature(lang_items, no_core)]
+#![no_core]
+
+#[lang = "sized"]
+trait MySized {}
+
+#[lang = "add"]
+trait MyAdd<'a, T> {}
+//~^^ ERROR: `add` language item must be applied to a trait with 1 generic argument [E0718]
+
+#[lang = "drop_in_place"]
+//~^ ERROR `drop_in_place` language item must be applied to a function with at least 1 generic
+fn my_ptr_drop() {}
+
+#[lang = "index"]
+trait MyIndex<'a, T> {}
+//~^^ ERROR: `index` language item must be applied to a trait with 1 generic argument [E0718]
+
+#[lang = "phantom_data"]
+//~^ ERROR `phantom_data` language item must be applied to a struct with 1 generic argument
+struct MyPhantomData<T, U>;
+
+#[lang = "owned_box"]
+//~^ ERROR `owned_box` language item must be applied to a struct with at least 1 generic argument
+struct Foo;
+
+// When the `start` lang item is missing generics very odd things can happen, especially when
+// it comes to cross-crate monomorphization
+#[lang = "start"]
+//~^ ERROR `start` language item must be applied to a function with 1 generic argument [E0718]
+fn start(_: *const u8, _: isize, _: *const *const u8) -> isize {
+    0
+}
+
+fn ice() {
+    // Use add
+    let r = 5;
+    let a = 6;
+    r + a;
+
+    // Use drop in place
+    my_ptr_drop();
+
+    // Use index
+    let arr = [0; 5];
+    let _ = arr[2];
+
+    // Use phantomdata
+    let _ = MyPhantomData::<(), i32>;
+
+    // Use Foo
+    let _: () = Foo;
+}
+
+// use `start`
+fn main() {}