rust/tests/ui/rfcs/rfc-2632-const-trait-impl/non-const-op-const-closure-...

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error[E0015]: cannot call non-const fn `<() as Foo>::foo` in constant functions
--> $DIR/non-const-op-const-closure-non-const-outer.rs:13:22
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LL | (const || { (()).foo() })();
| ^^^^^
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= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
help: add `#![feature(effects)]` to the crate attributes to enable
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LL + #![feature(effects)]
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error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0015`.