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1 error[E0015]: calls in constant functions are limited to constant functions, tuple structs and tuple variants
2   --> $DIR/unstable-const-fn-in-libcore.rs:24:26
3    |
4 LL |             Opt::None => f(),
5    |                          ^^^
6
7 error[E0493]: destructors cannot be evaluated at compile-time
8   --> $DIR/unstable-const-fn-in-libcore.rs:19:53
9    |
10 LL |     const fn unwrap_or_else<F: FnOnce() -> T>(self, f: F) -> T {
11    |                                                     ^ constant functions cannot evaluate destructors
12 ...
13 LL |     }
14    |     - value is dropped here
15
16 error[E0493]: destructors cannot be evaluated at compile-time
17   --> $DIR/unstable-const-fn-in-libcore.rs:19:47
18    |
19 LL |     const fn unwrap_or_else<F: FnOnce() -> T>(self, f: F) -> T {
20    |                                               ^^^^ constant functions cannot evaluate destructors
21 ...
22 LL |     }
23    |     - value is dropped here
24
25 error: aborting due to 3 previous errors
26
27 Some errors have detailed explanations: E0015, E0493.
28 For more information about an error, try `rustc --explain E0015`.