The redoxer target build of v4.3 failed with:
error[E0382]: the type `Arc` does not implement `Copy`
...
let scheme_for_events = Arc::clone(&scheme);
...
move || scheme_for_events_aer.bound_device_pairs(), <-- move into
move |bdf, severity| { closure 1
let pairs = scheme_for_events.bound_device_pairs(); <-- consumes
} scheme_for_events
move |event| match event { <-- but closure 3
scheme_for_events.dispatch_recovery(...); wants it too
}
Root cause: three closures (, ,
) all need access to the scheme. Each is `move` so
each must own its own Arc. Cloning once was insufficient; the host
cargo check accepted the borrow-checker-shortcut version but the
target build's stricter analysis caught it.
Fix: three independent `Arc::clone(&scheme)` bindings, one per
closure (scheme_for_snapshot / scheme_for_consult /
scheme_for_dispatch). Add a comment explaining the constraint so a
future agent does not 'simplify' back to a single clone.
Also remove the now-unused `scheme_for_events` binding.
Verified:
cargo check --target x86_64-unknown-redox clean (only pre-existing
parse_linux_id_table warning)
cargo check (host target) clean (same pre-existing)
cargo test --bin driver-manager 70 passed
cargo test --lib redox-driver-core 32 passed
vasilito
4822c85e5c