[INFO] updating cached repository https://github.com/jxs/follower-maze-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 09f182ea661757bfd94eb4140be932d3f9de6acb
[INFO] checking jxs/follower-maze-rust against master#9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7 for pr-64564
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjxs%2Ffollower-maze-rust" "work/builds/worker-7/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jxs/follower-maze-rust on toolchain 9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jxs/follower-maze-rust
[INFO] finished tweaking git repo https://github.com/jxs/follower-maze-rust
[INFO] tweaked toml for git repo https://github.com/jxs/follower-maze-rust written to work/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/jxs/follower-maze-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ec58000ec94f298a896bd1007c1401a581deaee11c7c12b35b74358d76544152
[INFO] running `"docker" "start" "-a" "ec58000ec94f298a896bd1007c1401a581deaee11c7c12b35b74358d76544152"`
[INFO] [stderr]     Checking tokio-futures v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking tokio-executor v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]     Checking backtrace-sys v0.1.30
[INFO] [stderr]     Checking tokio-io v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking backtrace v0.3.32
[INFO] [stderr]     Checking tokio-sync v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking tokio-codec v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking tokio-current-thread v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking tokio-threadpool v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking tokio-reactor v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking tokio-timer v0.3.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking tokio-uds v0.3.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking tokio-tcp v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking tokio-udp v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking tokio-fs v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.8
[INFO] [stderr]    Compiling tokio-macros v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking tokio v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking followermaze v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> src/lib/mod.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(await_macro, async_await)]
[INFO] [stderr]   |            ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: subsumed by `.await` syntax
[INFO] [stderr]  --> src/lib/mod.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(await_macro, async_await)]
[INFO] [stderr]   |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> src/lib/mod.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(await_macro, async_await)]
[INFO] [stderr]   |            ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: subsumed by `.await` syntax
[INFO] [stderr]  --> src/lib/mod.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(await_macro, async_await)]
[INFO] [stderr]   |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/lib/events/processor.rs:28:32
[INFO] [stderr]    |
[INFO] [stderr] 28 |       pub async fn run(mut self) {
[INFO] [stderr]    |  ________________________________^
[INFO] [stderr] 29 | |         let listener = self.listener.take().expect("run can only be polled once");
[INFO] [stderr] 30 | |         info!("clients listener Listening for clients on",);
[INFO] [stderr] 31 | |         let mut incoming = listener.incoming();
[INFO] [stderr] ...  |
[INFO] [stderr] 60 | |         }
[INFO] [stderr] 61 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/lib/events/processor.rs:28:32
[INFO] [stderr]    |
[INFO] [stderr] 28 |       pub async fn run(mut self) {
[INFO] [stderr]    |  ________________________________^
[INFO] [stderr] 29 | |         let listener = self.listener.take().expect("run can only be polled once");
[INFO] [stderr] 30 | |         info!("clients listener Listening for clients on",);
[INFO] [stderr] 31 | |         let mut incoming = listener.incoming();
[INFO] [stderr] ...  |
[INFO] [stderr] 60 | |         }
[INFO] [stderr] 61 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/lib/events/streamer.rs:86:32
[INFO] [stderr]     |
[INFO] [stderr] 86  |       pub async fn run(mut self) {
[INFO] [stderr]     |  ________________________________^
[INFO] [stderr] 87  | |         let mut incoming = self.socket.incoming();
[INFO] [stderr] 88  | |         let mut reader = match incoming.next().await {
[INFO] [stderr] 89  | |             Some(Ok(reader)) => FramedRead::new(reader.split().0, EventsDecoder::default()),
[INFO] [stderr] ...   |
[INFO] [stderr] 101 | |         }
[INFO] [stderr] 102 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0557`.
[INFO] [stderr] error: could not compile `followermaze`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/lib/events/streamer.rs:86:32
[INFO] [stderr]     |
[INFO] [stderr] 86  |       pub async fn run(mut self) {
[INFO] [stderr]     |  ________________________________^
[INFO] [stderr] 87  | |         let mut incoming = self.socket.incoming();
[INFO] [stderr] 88  | |         let mut reader = match incoming.next().await {
[INFO] [stderr] 89  | |             Some(Ok(reader)) => FramedRead::new(reader.split().0, EventsDecoder::default()),
[INFO] [stderr] ...   |
[INFO] [stderr] 101 | |         }
[INFO] [stderr] 102 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0557`.
[INFO] [stderr] error: could not compile `followermaze`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ec58000ec94f298a896bd1007c1401a581deaee11c7c12b35b74358d76544152"`
[INFO] running `"docker" "rm" "-f" "ec58000ec94f298a896bd1007c1401a581deaee11c7c12b35b74358d76544152"`
[INFO] [stdout] ec58000ec94f298a896bd1007c1401a581deaee11c7c12b35b74358d76544152