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a616fa5657
- it still mentions AST borrowck - it tracks errors that shouldn't exist and are fixed by polonius
19 lines
749 B
Plaintext
19 lines
749 B
Plaintext
error[E0502]: cannot borrow `*map` as mutable because it is also borrowed as immutable
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--> $DIR/get_default.rs:35:17
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LL | fn err(map: &mut Map) -> &String {
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| - let's call the lifetime of this reference `'1`
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LL | loop {
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LL | match map.get() {
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| --- immutable borrow occurs here
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LL | Some(v) => {
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LL | map.set(String::new()); // We always expect an error here.
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| ^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
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LL |
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LL | return v;
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| - returning this value requires that `*map` is borrowed for `'1`
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0502`.
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