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, 14 insertions, 0 deletions

diff --git a/src/test/ui/consts/recursive-zst-static.rs b/src/test/ui/consts/recursive-zst-static.rs
new file mode 100644
index 000000000..4e61634b3
--- /dev/null
+++ b/src/test/ui/consts/recursive-zst-static.rs
@@ -0,0 +1,14 @@
+// revisions: default unleash
+//[unleash]compile-flags: -Zunleash-the-miri-inside-of-you
+
+// This test ensures that we do not allow ZST statics to initialize themselves without ever
+// actually creating a value of that type. This is important, as the ZST may have private fields
+// that users can reasonably expect to only get initialized by their own code. Thus unsafe code
+// can depend on this fact and will thus do unsound things when it is violated.
+// See https://github.com/rust-lang/rust/issues/71078 for more details.
+
+static FOO: () = FOO; //~ cycle detected when const-evaluating + checking `FOO`
+
+fn main() {
+    FOO
+}