mirror of https://github.com/rust-lang/rust
24 lines
827 B
Plaintext
24 lines
827 B
Plaintext
error: captured variable cannot escape `FnMut` closure body
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--> $DIR/issue-40510-3.rs:7:9
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LL | let mut x: Vec<()> = Vec::new();
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| ----- variable defined here
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LL |
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LL | || {
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| - inferred to be a `FnMut` closure
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LL | / || {
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LL | | x.push(())
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| | - variable captured here
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LL | | }
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| |_________^ returns a closure that contains a reference to a captured variable, which then escapes the closure body
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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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help: consider adding 'move' keyword before the nested closure
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LL | move || {
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| ++++
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error: aborting due to 1 previous error
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