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error[E0015]: cannot call non-const closure in constant functions
--> $DIR/unstable-const-fn-in-libcore.rs:22:26
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LL | Opt::None => f(),
| ^^^
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= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
help: consider further restricting this bound
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LL | const fn unwrap_or_else<F: ~const FnOnce() -> T + ~const std::ops::FnOnce<()>>(self, f: F) -> T {
| +++++++++++++++++++++++++++++
error[E0493]: destructor of `F` cannot be evaluated at compile-time
--> $DIR/unstable-const-fn-in-libcore.rs:17:60
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LL | const fn unwrap_or_else<F: ~const FnOnce() -> T>(self, f: F) -> T {
| ^ the destructor for this type cannot be evaluated in constant functions
...
LL | }
| - value is dropped here
error[E0493]: destructor of `Opt<T>` cannot be evaluated at compile-time
--> $DIR/unstable-const-fn-in-libcore.rs:17:54
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LL | const fn unwrap_or_else<F: ~const FnOnce() -> T>(self, f: F) -> T {
| ^^^^ the destructor for this type cannot be evaluated in constant functions
...
LL | }
| - value is dropped here
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0015, E0493.
For more information about an error, try `rustc --explain E0015`.
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