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18 lines
754 B
Plaintext
18 lines
754 B
Plaintext
error: captured variable cannot escape `FnMut` closure body
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--> $DIR/regions-return-ref-to-upvar-issue-17403.rs:7:24
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LL | let mut x = 0;
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| ----- variable defined here
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LL | let mut f = || &mut x;
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| - ^^^^^-
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| | | |
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| | | variable captured here
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| | returns a reference to a captured variable which escapes the closure body
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| inferred to be a `FnMut` closure
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= note: `FnMut` closures only have access to their captured variables while they are executing...
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= note: ...therefore, they cannot allow references to captured variables to escape
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error: aborting due to 1 previous error
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