Dec 19 15:22:58.999 INFO checking jarrett/rust-patterns against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 15:22:58.999 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/jarrett/rust-patterns:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 15:22:59.228 INFO [stdout] 8ec2e6fd5c9241fccaeb51b781067b1449a8543df3a83915d5e9e36825ffb760
Dec 19 15:22:59.234 INFO running `"docker" "start" "-a" "8ec2e6fd5c9241fccaeb51b781067b1449a8543df3a83915d5e9e36825ffb760"`
Dec 19 15:22:59.832 INFO [stderr]     Checking rust-patterns v0.1.0 (/opt/crater/workdir)
Dec 19 15:23:00.240 INFO [stderr] warning: struct is never constructed: `Bar`
Dec 19 15:23:00.240 INFO [stderr]   --> src/any.rs:13:1
Dec 19 15:23:00.240 INFO [stderr]    |
Dec 19 15:23:00.240 INFO [stderr] 13 | struct Bar;
Dec 19 15:23:00.240 INFO [stderr]    | ^^^^^^^^^^^
Dec 19 15:23:00.240 INFO [stderr]    |
Dec 19 15:23:00.240 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 15:23:00.240 INFO [stderr] 
Dec 19 15:23:00.240 INFO [stderr] warning: struct is never constructed: `World`
Dec 19 15:23:00.240 INFO [stderr]  --> src/mutability.rs:5:1
Dec 19 15:23:00.240 INFO [stderr]   |
Dec 19 15:23:00.240 INFO [stderr] 5 | struct World {
Dec 19 15:23:00.240 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 15:23:00.240 INFO [stderr] 
Dec 19 15:23:00.240 INFO [stderr] warning: struct is never constructed: `Person`
Dec 19 15:23:00.240 INFO [stderr]   --> src/mutability.rs:25:1
Dec 19 15:23:00.240 INFO [stderr]    |
Dec 19 15:23:00.240 INFO [stderr] 25 | struct Person {
Dec 19 15:23:00.240 INFO [stderr]    | ^^^^^^^^^^^^^
Dec 19 15:23:00.240 INFO [stderr] 
Dec 19 15:23:00.240 INFO [stderr] warning: method is never used: `attack`
Dec 19 15:23:00.240 INFO [stderr]   --> src/mutability.rs:33:3
Dec 19 15:23:00.240 INFO [stderr]    |
Dec 19 15:23:00.240 INFO [stderr] 33 |   pub fn attack(&self, other: &mut Person) {
Dec 19 15:23:00.240 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.240 INFO [stderr] 
Dec 19 15:23:00.241 INFO [stderr] warning: method is never used: `attack_sibling`
Dec 19 15:23:00.241 INFO [stderr]   --> src/mutability.rs:37:3
Dec 19 15:23:00.241 INFO [stderr]    |
Dec 19 15:23:00.241 INFO [stderr] 37 |   pub fn attack_sibling(&self) -> Result<(), ()> {
Dec 19 15:23:00.241 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.241 INFO [stderr] 
Dec 19 15:23:00.241 INFO [stderr] warning: method is never used: `health`
Dec 19 15:23:00.241 INFO [stderr]   --> src/mutability.rs:46:3
Dec 19 15:23:00.241 INFO [stderr]    |
Dec 19 15:23:00.241 INFO [stderr] 46 |   pub fn health(&self) -> u8 { self.health }
Dec 19 15:23:00.241 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.241 INFO [stderr] 
Dec 19 15:23:00.241 INFO [stderr] warning: method is never used: `new`
Dec 19 15:23:00.241 INFO [stderr]   --> src/mutability.rs:48:3
Dec 19 15:23:00.241 INFO [stderr]    |
Dec 19 15:23:00.241 INFO [stderr] 48 |   pub fn new(armor: u8, strength: u8) -> Person {
Dec 19 15:23:00.241 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.241 INFO [stderr] 
Dec 19 15:23:00.241 INFO [stderr] warning: method is never used: `receive_attack`
Dec 19 15:23:00.241 INFO [stderr]   --> src/mutability.rs:52:3
Dec 19 15:23:00.241 INFO [stderr]    |
Dec 19 15:23:00.241 INFO [stderr] 52 |   pub fn receive_attack(&mut self, strength: u8) {
Dec 19 15:23:00.241 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.241 INFO [stderr] 
Dec 19 15:23:00.241 INFO [stderr] warning: method is never used: `set_sibling`
Dec 19 15:23:00.241 INFO [stderr]   --> src/mutability.rs:56:3
Dec 19 15:23:00.241 INFO [stderr]    |
Dec 19 15:23:00.241 INFO [stderr] 56 |   pub fn set_sibling(&mut self, sibling: &Rc<RefCell<Person>>) {
Dec 19 15:23:00.241 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.241 INFO [stderr] 
Dec 19 15:23:00.241 INFO [stderr] warning: type alias is never used: `EmitterRef`
Dec 19 15:23:00.241 INFO [stderr]  --> src/events/pointer.rs:6:1
Dec 19 15:23:00.241 INFO [stderr]   |
Dec 19 15:23:00.241 INFO [stderr] 6 | type EmitterRef<T> = Rc<RefCell<T>>;
Dec 19 15:23:00.241 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.241 INFO [stderr] 
Dec 19 15:23:00.241 INFO [stderr] warning: struct is never constructed: `PackagedEvent`
Dec 19 15:23:00.241 INFO [stderr]   --> src/events/pointer.rs:10:1
Dec 19 15:23:00.241 INFO [stderr]    |
Dec 19 15:23:00.241 INFO [stderr] 10 | struct PackagedEvent<T: 'static> {
Dec 19 15:23:00.241 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.241 INFO [stderr] 
Dec 19 15:23:00.244 INFO [stderr] warning: struct is never constructed: `Bar`
Dec 19 15:23:00.245 INFO [stderr]   --> src/events/pointer.rs:17:1
Dec 19 15:23:00.245 INFO [stderr]    |
Dec 19 15:23:00.245 INFO [stderr] 17 | struct Bar {
Dec 19 15:23:00.245 INFO [stderr]    | ^^^^^^^^^^
Dec 19 15:23:00.245 INFO [stderr] 
Dec 19 15:23:00.245 INFO [stderr] warning: method is never used: `cast`
Dec 19 15:23:00.245 INFO [stderr]   --> src/events/pointer.rs:22:3
Dec 19 15:23:00.245 INFO [stderr]    |
Dec 19 15:23:00.245 INFO [stderr] 22 | /   fn cast<U, V, F>(&self, f: F) -> Option<V>
Dec 19 15:23:00.245 INFO [stderr] 23 | |     where U: 'static, F: FnOnce(&U) -> V
Dec 19 15:23:00.245 INFO [stderr] 24 | |   {
Dec 19 15:23:00.245 INFO [stderr] 25 | |     self.event.as_any().downcast_ref::<U>().map(f)
Dec 19 15:23:00.245 INFO [stderr] 26 | |   }
Dec 19 15:23:00.245 INFO [stderr]    | |___^
Dec 19 15:23:00.245 INFO [stderr] 
Dec 19 15:23:00.245 INFO [stderr] warning: method is never used: `package`
Dec 19 15:23:00.245 INFO [stderr]   --> src/events/pointer.rs:29:3
Dec 19 15:23:00.245 INFO [stderr]    |
Dec 19 15:23:00.245 INFO [stderr] 29 |   fn package(events: &mut Events, emitter: &EmitterRef<T>) -> Vec<PackagedEvent<T>> {
Dec 19 15:23:00.245 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.245 INFO [stderr] 
Dec 19 15:23:00.245 INFO [stderr] warning: struct is never constructed: `EntityRef`
Dec 19 15:23:00.245 INFO [stderr]   --> src/events/uuid.rs:18:1
Dec 19 15:23:00.245 INFO [stderr]    |
Dec 19 15:23:00.245 INFO [stderr] 18 | struct EntityRef<T: 'static> {
Dec 19 15:23:00.245 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.245 INFO [stderr] 
Dec 19 15:23:00.245 INFO [stderr] warning: struct is never constructed: `PackagedEvent`
Dec 19 15:23:00.245 INFO [stderr]   --> src/events/uuid.rs:25:1
Dec 19 15:23:00.245 INFO [stderr]    |
Dec 19 15:23:00.245 INFO [stderr] 25 | struct PackagedEvent<T: 'static> {
Dec 19 15:23:00.245 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.245 INFO [stderr] 
Dec 19 15:23:00.245 INFO [stderr] warning: struct is never constructed: `Bar`
Dec 19 15:23:00.245 INFO [stderr]   --> src/events/uuid.rs:32:1
Dec 19 15:23:00.245 INFO [stderr]    |
Dec 19 15:23:00.245 INFO [stderr] 32 | struct Bar {
Dec 19 15:23:00.245 INFO [stderr]    | ^^^^^^^^^^
Dec 19 15:23:00.245 INFO [stderr] 
Dec 19 15:23:00.245 INFO [stderr] warning: method is never used: `clone`
Dec 19 15:23:00.245 INFO [stderr]   --> src/events/uuid.rs:41:3
Dec 19 15:23:00.245 INFO [stderr]    |
Dec 19 15:23:00.245 INFO [stderr] 41 |   fn clone(&self) -> Self {
Dec 19 15:23:00.245 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.245 INFO [stderr] 
Dec 19 15:23:00.245 INFO [stderr] warning: method is never used: `new`
Dec 19 15:23:00.245 INFO [stderr]   --> src/events/uuid.rs:45:3
Dec 19 15:23:00.245 INFO [stderr]    |
Dec 19 15:23:00.245 INFO [stderr] 45 |   fn new(uuid: Uuid) -> Self {
Dec 19 15:23:00.245 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.245 INFO [stderr] 
Dec 19 15:23:00.245 INFO [stderr] warning: method is never used: `resolve`
Dec 19 15:23:00.245 INFO [stderr]   --> src/events/uuid.rs:51:3
Dec 19 15:23:00.245 INFO [stderr]    |
Dec 19 15:23:00.245 INFO [stderr] 51 | /   fn resolve<'a>(
Dec 19 15:23:00.245 INFO [stderr] 52 | |     &self, registry: &'a HashMap<Uuid, Box<Any>>
Dec 19 15:23:00.245 INFO [stderr] 53 | |   ) -> &'a Rc<RefCell<T>> {
Dec 19 15:23:00.245 INFO [stderr] 54 | |     registry.get(&self.uuid).unwrap().downcast_ref::<Rc<RefCell<T>>>().unwrap()
Dec 19 15:23:00.245 INFO [stderr] 55 | |   }
Dec 19 15:23:00.245 INFO [stderr]    | |___^
Dec 19 15:23:00.245 INFO [stderr] 
Dec 19 15:23:00.245 INFO [stderr] warning: method is never used: `cast`
Dec 19 15:23:00.245 INFO [stderr]   --> src/events/uuid.rs:59:3
Dec 19 15:23:00.245 INFO [stderr]    |
Dec 19 15:23:00.245 INFO [stderr] 59 | /   fn cast<U, V, F>(&self, f: F) -> Option<V>
Dec 19 15:23:00.245 INFO [stderr] 60 | |     where U: 'static, F: FnOnce(&U) -> V
Dec 19 15:23:00.245 INFO [stderr] 61 | |   {
Dec 19 15:23:00.245 INFO [stderr] 62 | |     self.event.as_any().downcast_ref::<U>().map(f)
Dec 19 15:23:00.245 INFO [stderr] 63 | |   }
Dec 19 15:23:00.245 INFO [stderr]    | |___^
Dec 19 15:23:00.245 INFO [stderr] 
Dec 19 15:23:00.245 INFO [stderr] warning: method is never used: `package`
Dec 19 15:23:00.245 INFO [stderr]   --> src/events/uuid.rs:66:3
Dec 19 15:23:00.245 INFO [stderr]    |
Dec 19 15:23:00.245 INFO [stderr] 66 |   fn package(events: &mut Events, emitter: &EntityRef<T>) -> Vec<PackagedEvent<T>> {
Dec 19 15:23:00.245 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.245 INFO [stderr] 
Dec 19 15:23:00.245 INFO [stderr] warning: method is never used: `new`
Dec 19 15:23:00.245 INFO [stderr]   --> src/events/uuid.rs:74:3
Dec 19 15:23:00.245 INFO [stderr]    |
Dec 19 15:23:00.245 INFO [stderr] 74 |   fn new() -> Bar {
Dec 19 15:23:00.245 INFO [stderr]    |   ^^^^^^^^^^^^^^^
Dec 19 15:23:00.245 INFO [stderr] 
Dec 19 15:23:00.245 INFO [stderr] warning: struct is never constructed: `Events`
Dec 19 15:23:00.246 INFO [stderr]   --> src/events/mod.rs:15:1
Dec 19 15:23:00.246 INFO [stderr]    |
Dec 19 15:23:00.246 INFO [stderr] 15 | struct Events {
Dec 19 15:23:00.246 INFO [stderr]    | ^^^^^^^^^^^^^
Dec 19 15:23:00.246 INFO [stderr] 
Dec 19 15:23:00.246 INFO [stderr] warning: struct is never constructed: `FooEvent`
Dec 19 15:23:00.246 INFO [stderr]   --> src/events/mod.rs:20:1
Dec 19 15:23:00.246 INFO [stderr]    |
Dec 19 15:23:00.246 INFO [stderr] 20 | struct FooEvent {
Dec 19 15:23:00.246 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 19 15:23:00.246 INFO [stderr] 
Dec 19 15:23:00.246 INFO [stderr] warning: method is never used: `emit`
Dec 19 15:23:00.246 INFO [stderr]   --> src/events/mod.rs:29:3
Dec 19 15:23:00.246 INFO [stderr]    |
Dec 19 15:23:00.246 INFO [stderr] 29 |   fn emit<U: 'static + Event>(&mut self, event: U) {
Dec 19 15:23:00.246 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.246 INFO [stderr] 
Dec 19 15:23:00.246 INFO [stderr] warning: method is never used: `new`
Dec 19 15:23:00.246 INFO [stderr]   --> src/events/mod.rs:33:3
Dec 19 15:23:00.246 INFO [stderr]    |
Dec 19 15:23:00.246 INFO [stderr] 33 |   fn new() -> Events {
Dec 19 15:23:00.246 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.246 INFO [stderr] 
Dec 19 15:23:00.246 INFO [stderr] warning: method is never used: `new`
Dec 19 15:23:00.246 INFO [stderr]   --> src/events/mod.rs:41:3
Dec 19 15:23:00.246 INFO [stderr]    |
Dec 19 15:23:00.246 INFO [stderr] 41 |   fn new(message: &str) -> FooEvent {
Dec 19 15:23:00.246 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.246 INFO [stderr] 
Dec 19 15:23:00.246 INFO [stderr] warning: struct is never constructed: `Animal`
Dec 19 15:23:00.246 INFO [stderr]  --> src/lifetimes.rs:1:1
Dec 19 15:23:00.246 INFO [stderr]   |
Dec 19 15:23:00.246 INFO [stderr] 1 | struct Animal {
Dec 19 15:23:00.246 INFO [stderr]   | ^^^^^^^^^^^^^
Dec 19 15:23:00.246 INFO [stderr] 
Dec 19 15:23:00.246 INFO [stderr] warning: method is never used: `borrow_name`
Dec 19 15:23:00.246 INFO [stderr]  --> src/lifetimes.rs:6:3
Dec 19 15:23:00.246 INFO [stderr]   |
Dec 19 15:23:00.246 INFO [stderr] 6 |   fn borrow_name<'a>(&'a self) -> &'a String {
Dec 19 15:23:00.246 INFO [stderr]   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:23:00.246 INFO [stderr] 
Dec 19 15:23:00.348 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
Dec 19 15:23:00.615 INFO running `"docker" "inspect" "8ec2e6fd5c9241fccaeb51b781067b1449a8543df3a83915d5e9e36825ffb760"`
Dec 19 15:23:00.716 INFO running `"docker" "rm" "-f" "8ec2e6fd5c9241fccaeb51b781067b1449a8543df3a83915d5e9e36825ffb760"`
Dec 19 15:23:00.815 INFO [stdout] 8ec2e6fd5c9241fccaeb51b781067b1449a8543df3a83915d5e9e36825ffb760