error[E0635]: unknown feature `const_fn_trait_ref_impls` --> $DIR/fn_trait_refs.rs:3:12 | LL | #![feature(const_fn_trait_ref_impls)] | ^^^^^^^^^^^^^^^^^^^^^^^^ error[E0635]: unknown feature `const_cmp` --> $DIR/fn_trait_refs.rs:7:12 | LL | #![feature(const_cmp)] | ^^^^^^^^^ error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:13:15 | LL | T: ~const Fn<()> + ~const Destruct, | ^^^^^^ error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:13:31 | LL | T: ~const Fn<()> + ~const Destruct, | ^^^^^^^^ error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:13:15 | LL | T: ~const Fn<()> + ~const Destruct, | ^^^^^^ | = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:20:15 | LL | T: ~const FnMut<()> + ~const Destruct, | ^^^^^^^^^ error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:20:34 | LL | T: ~const FnMut<()> + ~const Destruct, | ^^^^^^^^ error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:20:15 | LL | T: ~const FnMut<()> + ~const Destruct, | ^^^^^^^^^ | = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:27:15 | LL | T: ~const FnOnce<()>, | ^^^^^^^^^^ error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:27:15 | LL | T: ~const FnOnce<()>, | ^^^^^^^^^^ | = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:34:15 | LL | T: ~const Fn<()> + ~const Destruct, | ^^^^^^ error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:34:31 | LL | T: ~const Fn<()> + ~const Destruct, | ^^^^^^^^ error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:34:15 | LL | T: ~const Fn<()> + ~const Destruct, | ^^^^^^ | = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:48:15 | LL | T: ~const FnMut<()> + ~const Destruct, | ^^^^^^^^^ error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:48:34 | LL | T: ~const FnMut<()> + ~const Destruct, | ^^^^^^^^ error: `~const` can only be applied to `#[const_trait]` traits --> $DIR/fn_trait_refs.rs:48:15 | LL | T: ~const FnMut<()> + ~const Destruct, | ^^^^^^^^^ | = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error[E0015]: cannot call non-const operator in constants --> $DIR/fn_trait_refs.rs:70:17 | LL | assert!(test_one == (1, 1, 1)); | ^^^^^^^^^^^^^^^^^^^^^ | = note: calls in constants are limited to constant functions, tuple structs and tuple variants help: add `#![feature(effects)]` to the crate attributes to enable | LL + #![feature(effects)] | error[E0015]: cannot call non-const operator in constants --> $DIR/fn_trait_refs.rs:73:17 | LL | assert!(test_two == (2, 2)); | ^^^^^^^^^^^^^^^^^^ | = note: calls in constants are limited to constant functions, tuple structs and tuple variants help: add `#![feature(effects)]` to the crate attributes to enable | LL + #![feature(effects)] | error[E0015]: cannot call non-const closure in constant functions --> $DIR/fn_trait_refs.rs:15:5 | LL | f() | ^^^ | = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants help: consider further restricting this bound | LL | T: ~const Fn<()> + ~const Destruct + ~const Fn(), | +++++++++++++ help: add `#![feature(effects)]` to the crate attributes to enable | LL + #![feature(effects)] | error[E0493]: destructor of `T` cannot be evaluated at compile-time --> $DIR/fn_trait_refs.rs:11:23 | LL | const fn tester_fn(f: T) -> T::Output | ^ the destructor for this type cannot be evaluated in constant functions ... LL | } | - value is dropped here error[E0015]: cannot call non-const closure in constant functions --> $DIR/fn_trait_refs.rs:22:5 | LL | f() | ^^^ | = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants help: consider further restricting this bound | LL | T: ~const FnMut<()> + ~const Destruct + ~const FnMut(), | ++++++++++++++++ help: add `#![feature(effects)]` to the crate attributes to enable | LL + #![feature(effects)] | error[E0493]: destructor of `T` cannot be evaluated at compile-time --> $DIR/fn_trait_refs.rs:18:27 | LL | const fn tester_fn_mut(mut f: T) -> T::Output | ^^^^^ the destructor for this type cannot be evaluated in constant functions ... LL | } | - value is dropped here error[E0015]: cannot call non-const closure in constant functions --> $DIR/fn_trait_refs.rs:29:5 | LL | f() | ^^^ | = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants help: consider further restricting this bound | LL | T: ~const FnOnce<()> + ~const FnOnce(), | +++++++++++++++++ help: add `#![feature(effects)]` to the crate attributes to enable | LL + #![feature(effects)] | error[E0493]: destructor of `T` cannot be evaluated at compile-time --> $DIR/fn_trait_refs.rs:32:21 | LL | const fn test_fn(mut f: T) -> (T::Output, T::Output, T::Output) | ^^^^^ the destructor for this type cannot be evaluated in constant functions ... LL | } | - value is dropped here error[E0493]: destructor of `T` cannot be evaluated at compile-time --> $DIR/fn_trait_refs.rs:46:25 | LL | const fn test_fn_mut(mut f: T) -> (T::Output, T::Output) | ^^^^^ the destructor for this type cannot be evaluated in constant functions ... LL | } | - value is dropped here error: aborting due to 25 previous errors Some errors have detailed explanations: E0015, E0493, E0635. For more information about an error, try `rustc --explain E0015`.