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error[E0521]: borrowed data escapes outside of closure
--> $DIR/issue-7573.rs:17:9
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LL | let mut lines_to_use: Vec<&CrateId> = Vec::new();
| ---------------- `lines_to_use` declared here, outside of the closure body
LL |
LL | let push_id = |installed_id: &CrateId| {
| ------------ `installed_id` is a reference that is only valid in the closure body
LL |
LL | lines_to_use.push(installed_id);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `installed_id` escapes the closure body here
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= note: requirement occurs because of a mutable reference to `Vec<&CrateId>`
= note: mutable references are invariant over their type parameter
= help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0521`.
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