[INFO] updating cached repository thjwhite/rust_playing
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/thjwhite/rust_playing
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/thjwhite/rust_playing" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/thjwhite/rust_playing"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/thjwhite/rust_playing'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/thjwhite/rust_playing" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/thjwhite/rust_playing"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/thjwhite/rust_playing'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1e2bd18631ec2ac6ccfd4e0e9df811bf8065a3d1
[INFO] sha for GitHub repo thjwhite/rust_playing: 1e2bd18631ec2ac6ccfd4e0e9df811bf8065a3d1
[INFO] validating manifest of thjwhite/rust_playing on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of thjwhite/rust_playing on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing thjwhite/rust_playing
[INFO] finished frobbing thjwhite/rust_playing
[INFO] frobbed toml for thjwhite/rust_playing written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/thjwhite/rust_playing/Cargo.toml
[INFO] started frobbing thjwhite/rust_playing
[INFO] finished frobbing thjwhite/rust_playing
[INFO] frobbed toml for thjwhite/rust_playing written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/thjwhite/rust_playing/Cargo.toml
[INFO] crate thjwhite/rust_playing already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/thjwhite/rust_playing/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking thjwhite/rust_playing against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-7/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/thjwhite/rust_playing:/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" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 33501eeac11c9c085593540fc5bf264875838158c418a4afd205ebbf8c1025e7
[INFO] running `"docker" "start" "-a" "33501eeac11c9c085593540fc5bf264875838158c418a4afd205ebbf8c1025e7"`
[INFO] [stderr]     Checking memrustd v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `event_loop`
[INFO] [stderr]   --> src/main.rs:45:24
[INFO] [stderr]    |
[INFO] [stderr] 45 |                        event_loop: &mut mio::EventLoop<Server>) -> std::io::Result<()> {
[INFO] [stderr]    |                        ^^^^^^^^^^ help: consider prefixing with an underscore: `_event_loop`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `event_loop`
[INFO] [stderr]   --> src/main.rs:72:24
[INFO] [stderr]    |
[INFO] [stderr] 72 |                        event_loop: &mut mio::EventLoop<Server>) -> std::io::Result<()> {
[INFO] [stderr]    |                        ^^^^^^^^^^ help: consider prefixing with an underscore: `_event_loop`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `event_loop`
[INFO] [stderr]   --> src/main.rs:45:24
[INFO] [stderr]    |
[INFO] [stderr] 45 |                        event_loop: &mut mio::EventLoop<Server>) -> std::io::Result<()> {
[INFO] [stderr]    |                        ^^^^^^^^^^ help: consider prefixing with an underscore: `_event_loop`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `event_loop`
[INFO] [stderr]   --> src/main.rs:72:24
[INFO] [stderr]    |
[INFO] [stderr] 72 |                        event_loop: &mut mio::EventLoop<Server>) -> std::io::Result<()> {
[INFO] [stderr]    |                        ^^^^^^^^^^ help: consider prefixing with an underscore: `_event_loop`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LruEntry`
[INFO] [stderr]  --> src/lru.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct LruEntry<T> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LruCache`
[INFO] [stderr]   --> src/lru.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | struct LruCache<T> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/lru.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn new() -> LruCache<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/lru.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn get(&mut self, key: String) -> Result<Arc<RefCell<LruEntry<T>>>, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]   --> src/lru.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     fn insert(&mut self, key: String, data: T) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `close_gap`
[INFO] [stderr]   --> src/lru.rs:84:5
[INFO] [stderr]    |
[INFO] [stderr] 84 |     fn close_gap(&mut self, entry: Arc<RefCell<LruEntry<T>>>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove`
[INFO] [stderr]    --> src/lru.rs:127:5
[INFO] [stderr]     |
[INFO] [stderr] 127 |     fn remove(&mut self, key: String) -> Result<Arc<RefCell<LruEntry<T>>>, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `interest`
[INFO] [stderr]   --> src/main.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     interest: mio::EventSet,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:59:21
[INFO] [stderr]    |
[INFO] [stderr] 59 |                     self.out_buf.write_all(self.in_buf.get_ref());
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:191:21
[INFO] [stderr]     |
[INFO] [stderr] 191 |                     event_loop.deregister(&conn.socket);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:233:21
[INFO] [stderr]     |
[INFO] [stderr] 233 |                     self.connections[event_token].handle_readable(event_loop);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:238:21
[INFO] [stderr]     |
[INFO] [stderr] 238 |                     self.connections[event_token].handle_writable(event_loop);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:250:5
[INFO] [stderr]     |
[INFO] [stderr] 250 |     event_loop.register(&server, SERVER, mio::EventSet::readable(), mio::PollOpt::edge());
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:253:5
[INFO] [stderr]     |
[INFO] [stderr] 253 |     event_loop.run(&mut Server::new(server));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LruEntry`
[INFO] [stderr]  --> src/lru.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct LruEntry<T> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LruCache`
[INFO] [stderr]   --> src/lru.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | struct LruCache<T> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/lru.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn new() -> LruCache<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/lru.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn get(&mut self, key: String) -> Result<Arc<RefCell<LruEntry<T>>>, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]   --> src/lru.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     fn insert(&mut self, key: String, data: T) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `close_gap`
[INFO] [stderr]   --> src/lru.rs:84:5
[INFO] [stderr]    |
[INFO] [stderr] 84 |     fn close_gap(&mut self, entry: Arc<RefCell<LruEntry<T>>>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove`
[INFO] [stderr]    --> src/lru.rs:127:5
[INFO] [stderr]     |
[INFO] [stderr] 127 |     fn remove(&mut self, key: String) -> Result<Arc<RefCell<LruEntry<T>>>, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `interest`
[INFO] [stderr]   --> src/main.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     interest: mio::EventSet,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:59:21
[INFO] [stderr]    |
[INFO] [stderr] 59 |                     self.out_buf.write_all(self.in_buf.get_ref());
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:191:21
[INFO] [stderr]     |
[INFO] [stderr] 191 |                     event_loop.deregister(&conn.socket);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:233:21
[INFO] [stderr]     |
[INFO] [stderr] 233 |                     self.connections[event_token].handle_readable(event_loop);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:238:21
[INFO] [stderr]     |
[INFO] [stderr] 238 |                     self.connections[event_token].handle_writable(event_loop);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:250:5
[INFO] [stderr]     |
[INFO] [stderr] 250 |     event_loop.register(&server, SERVER, mio::EventSet::readable(), mio::PollOpt::edge());
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:253:5
[INFO] [stderr]     |
[INFO] [stderr] 253 |     event_loop.run(&mut Server::new(server));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "33501eeac11c9c085593540fc5bf264875838158c418a4afd205ebbf8c1025e7"`
[INFO] running `"docker" "rm" "-f" "33501eeac11c9c085593540fc5bf264875838158c418a4afd205ebbf8c1025e7"`
[INFO] [stdout] 33501eeac11c9c085593540fc5bf264875838158c418a4afd205ebbf8c1025e7