rust/tests/ui/consts/recursive-zst-static.rs
Oli Scherer 73b38c661d Do not allocate a second "background" alloc id for the main allocation of a static.
Instead we re-use the static's alloc id within the interpreter for its initializer to refer to the `Allocation` that only exists within the interpreter.
2024-02-15 10:25:18 +00:00

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720 B
Rust

// 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;
//~^ ERROR could not evaluate static initializer
static A: () = B; //~ cycle detected when evaluating initializer of static `A`
static B: () = A;
fn main() {
FOO
}