30 lines
997 B
Plaintext
30 lines
997 B
Plaintext
warning: captured variable cannot escape `FnMut` closure body
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--> $DIR/issue-49824.rs:12:9
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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 | | let _y = &mut x;
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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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= warning: this error has been downgraded to a warning for backwards compatibility with previous releases
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= warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
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error: compilation successful
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--> $DIR/issue-49824.rs:8:1
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LL | / fn main() {
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LL | |
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LL | | let mut x = 0;
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LL | | || {
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... |
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LL | | };
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LL | | }
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| |_^
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error: aborting due to previous error
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