[INFO] cloning repository https://github.com/Flarp/DoIWannaKnow
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Flarp/DoIWannaKnow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFlarp%2FDoIWannaKnow", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFlarp%2FDoIWannaKnow'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5d9fda6cba04811ee907a5855bb2ba1c05dc0d39
[INFO] checking Flarp/DoIWannaKnow against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFlarp%2FDoIWannaKnow" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Flarp/DoIWannaKnow on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Flarp/DoIWannaKnow
[INFO] finished tweaking git repo https://github.com/Flarp/DoIWannaKnow
[INFO] tweaked toml for git repo https://github.com/Flarp/DoIWannaKnow written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/Flarp/DoIWannaKnow already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02cfaf892d34a82c979b3c8f0efe7c013ff64c9582f7afd16a8b7436fb26ddb5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "02cfaf892d34a82c979b3c8f0efe7c013ff64c9582f7afd16a8b7436fb26ddb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02cfaf892d34a82c979b3c8f0efe7c013ff64c9582f7afd16a8b7436fb26ddb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02cfaf892d34a82c979b3c8f0efe7c013ff64c9582f7afd16a8b7436fb26ddb5", kill_on_drop: false }`
[INFO] [stdout] 02cfaf892d34a82c979b3c8f0efe7c013ff64c9582f7afd16a8b7436fb26ddb5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7c9bd84bd2b5d6dbde4d03b61b7587dd1b1b5250830ad2c62f401232be3f7547
[INFO] running `Command { std: "docker" "start" "-a" "7c9bd84bd2b5d6dbde4d03b61b7587dd1b1b5250830ad2c62f401232be3f7547", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.32
[INFO] [stderr]    Compiling lazy_static v0.2.9
[INFO] [stderr]    Compiling either v1.2.0
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling cc v1.0.1
[INFO] [stderr]    Compiling futures v0.1.16
[INFO] [stderr]    Compiling pq-sys v0.4.4
[INFO] [stderr]    Compiling byteorder v1.1.0
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling yansi v0.3.4
[INFO] [stderr]    Compiling matches v0.1.6
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.5
[INFO] [stderr]    Compiling regex-syntax v0.3.9
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/yansi-0.3.4/src/lib.rs:1:32
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature="nightly", feature(const_atomic_bool_new))]
[INFO] [stdout]   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rustc-demangle v0.1.5
[INFO] [stderr]    Compiling utf8-ranges v0.1.3
[INFO] [stderr]     Checking serde v1.0.15
[INFO] [stderr]    Compiling percent-encoding v1.0.0
[INFO] [stderr]    Compiling regex-syntax v0.4.1
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling bitflags v0.9.1
[INFO] [stderr] error: could not compile `yansi` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7c9bd84bd2b5d6dbde4d03b61b7587dd1b1b5250830ad2c62f401232be3f7547", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c9bd84bd2b5d6dbde4d03b61b7587dd1b1b5250830ad2c62f401232be3f7547", kill_on_drop: false }`
[INFO] [stdout] 7c9bd84bd2b5d6dbde4d03b61b7587dd1b1b5250830ad2c62f401232be3f7547
