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// revisions: e2018 e2021
//[e2018] edition:2018
//[e2021] edition:2021
//[e2018] check-pass
#![crate_type = "lib"]
#![stable(feature = "foo", since = "1.0.0")]
#![feature(staged_api)]
#[stable(feature = "foo", since = "1.0.0")]
#[rustc_const_stable(feature = "foo", since = "1.0.0")]
const fn foo() {
assert!(false);
assert!(false, "foo");
panic!({ "foo" });
//[e2018]~^ WARNING panic message is not a string literal
//[e2021]~^^ ERROR format argument must be a string literal
}
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