[INFO] cloning repository https://github.com/jxs/follower-maze-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jxs/follower-maze-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjxs%2Ffollower-maze-rust"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjxs%2Ffollower-maze-rust'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 09f182ea661757bfd94eb4140be932d3f9de6acb
[INFO] checking jxs/follower-maze-rust against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjxs%2Ffollower-maze-rust" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jxs/follower-maze-rust on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "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 /workspace/builds/worker-1/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 `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-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" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0449d1bc3ba0f4c2f67998fde21862fc1195696df4246a4e5753055b7ae77dea
[INFO] running `"docker" "start" "-a" "0449d1bc3ba0f4c2f67998fde21862fc1195696df4246a4e5753055b7ae77dea"`
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking async-util v0.1.0 (https://github.com/tokio-rs/async#e1b3ba3d)
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking arc-waker v0.1.0 (https://github.com/tokio-rs/async#e1b3ba3d)
[INFO] [stderr]    Compiling rand_chacha v0.2.0
[INFO] [stderr]     Checking crossbeam-utils v0.6.5 (https://github.com/stjepang/crossbeam?branch=raw-parker#e2a7760f)
[INFO] [stderr]     Checking tracing-core v0.1.2
[INFO] [stderr]     Checking getrandom v0.1.6
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling parking_lot_core v0.6.1
[INFO] [stderr]     Checking crossbeam-epoch v0.7.1
[INFO] [stderr]     Checking backtrace-sys v0.1.30
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking regex v1.1.9
[INFO] [stderr]     Checking backtrace v0.3.32
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]     Checking tokio-futures v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking tokio-io v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking tokio-executor v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[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 parking_lot v0.9.0
[INFO] [stderr]     Checking rand v0.7.0
[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 env_logger v0.5.13
[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-uds v0.3.0 (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-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 failure_derive v0.1.5
[INFO] [stderr]    Compiling tokio-macros v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]     Checking tokio v0.2.0 (https://github.com/tokio-rs/tokio.git?rev=a18ddb3b616b8c4c910fc927f6d72272319675c2#a18ddb3b)
[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking failure v0.1.5
[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] 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] 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" "0449d1bc3ba0f4c2f67998fde21862fc1195696df4246a4e5753055b7ae77dea"`
[INFO] running `"docker" "rm" "-f" "0449d1bc3ba0f4c2f67998fde21862fc1195696df4246a4e5753055b7ae77dea"`
[INFO] [stdout] 0449d1bc3ba0f4c2f67998fde21862fc1195696df4246a4e5753055b7ae77dea