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error[E0308]: mismatched types
--> $DIR/closure-print-verbose.rs:10:29
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LL | let foo: fn(u8) -> u8 = |v: u8| { a += v; a };
| ------------ ^^^^^^^^^^^^^^^^^^^^^ expected fn pointer, found closure
| |
| expected due to this
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= note: expected fn pointer `fn(u8) -> u8`
found closure `{main::{closure#0} closure_args=(unavailable) args=[i8, extern "rust-call" fn((u8,)) -> u8, ?6t]}`
note: closures can only be coerced to `fn` types if they do not capture any variables
--> $DIR/closure-print-verbose.rs:10:39
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LL | let foo: fn(u8) -> u8 = |v: u8| { a += v; a };
| ^ `a` captured here
error: aborting due to previous error
For more information about this error, try `rustc --explain E0308`.
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