#![unstable(feature = "humans", reason = "who ever let humans program computers, we're apparently really bad at it", issue = "none")] #![feature(staged_api)] #[stable(feature = "rust1", since = "1.0.0")] #[rustc_const_unstable(feature="foo", issue = "none")] const fn foo() -> u32 { 42 } fn meh() -> u32 { 42 } const fn bar() -> u32 { foo() } //~ ERROR `foo` is not yet stable as a const fn fn a() { let _: &'static u32 = &foo(); //~ ERROR temporary value dropped while borrowed } fn main() { let _: &'static u32 = &meh(); //~ ERROR temporary value dropped while borrowed let x: &'static _ = &std::time::Duration::from_millis(42).subsec_millis(); //~^ ERROR temporary value dropped while borrowed }