Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

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

1 files changed, 17 insertions, 0 deletions

diff --git a/compiler/rustc_error_codes/src/error_codes/E0522.md b/compiler/rustc_error_codes/src/error_codes/E0522.md
new file mode 100644
index 000000000..83272314a
--- /dev/null
+++ b/compiler/rustc_error_codes/src/error_codes/E0522.md
@@ -0,0 +1,17 @@
+The lang attribute was used in an invalid context.
+
+Erroneous code example:
+
+```compile_fail,E0522
+#![feature(lang_items)]
+
+#[lang = "cookie"]
+fn cookie() -> ! { // error: definition of an unknown language item: `cookie`
+    loop {}
+}
+```
+
+The lang attribute is intended for marking special items that are built-in to
+Rust itself. This includes special traits (like `Copy` and `Sized`) that affect
+how the compiler behaves, as well as special functions that may be automatically
+invoked (such as the handler for out-of-bounds accesses when indexing a slice).