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-rw-r--r--tests/ui/consts/recursive-zst-static.rs14
1 files changed, 14 insertions, 0 deletions
diff --git a/tests/ui/consts/recursive-zst-static.rs b/tests/ui/consts/recursive-zst-static.rs
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+++ b/tests/ui/consts/recursive-zst-static.rs
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+// 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
+}