[INFO] cloning repository https://github.com/iliakonnov/awsync
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iliakonnov/awsync" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filiakonnov%2Fawsync", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filiakonnov%2Fawsync'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d477fb9275f605909e07ab04d2ca95c6d46737de
[INFO] testing iliakonnov/awsync against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filiakonnov%2Fawsync" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iliakonnov/awsync on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/iliakonnov/awsync
[INFO] finished tweaking git repo https://github.com/iliakonnov/awsync
[INFO] tweaked toml for git repo https://github.com/iliakonnov/awsync written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/iliakonnov/awsync already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.129
[INFO] [stderr]   Downloaded hex-literal v0.3.3
[INFO] [stderr]   Downloaded rusqlite v0.25.3
[INFO] [stderr]   Downloaded serde v1.0.129
[INFO] [stderr]   Downloaded time-macros v0.2.1
[INFO] [stderr]   Downloaded time v0.3.1
[INFO] [stderr]   Downloaded tokio v1.10.1
[INFO] [stderr]   Downloaded os_str_bytes v4.0.0
[INFO] [stderr]   Downloaded object v0.26.1
[INFO] [stderr]   Downloaded libsqlite3-sys v0.22.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 627eed3dac932627ef18aac75b698ced0f68b26cfd448c526cc6c79f0ce57c11
[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" "627eed3dac932627ef18aac75b698ced0f68b26cfd448c526cc6c79f0ce57c11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "627eed3dac932627ef18aac75b698ced0f68b26cfd448c526cc6c79f0ce57c11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "627eed3dac932627ef18aac75b698ced0f68b26cfd448c526cc6c79f0ce57c11", kill_on_drop: false }`
[INFO] [stdout] 627eed3dac932627ef18aac75b698ced0f68b26cfd448c526cc6c79f0ce57c11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa38311a08b8cb691a82d6c6e462d30e8a93675e8d14ec0122b9c64dc6729e8d
[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" "aa38311a08b8cb691a82d6c6e462d30e8a93675e8d14ec0122b9c64dc6729e8d", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stderr]    Compiling time-macros v0.2.1
[INFO] [stderr]    Compiling os_str_bytes v4.0.0
[INFO] [stderr]    Compiling libsqlite3-sys v0.22.2
[INFO] [stderr]    Compiling tokio v1.10.1
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling object v0.26.1
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling snafu-derive v0.6.10
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling ahash v0.7.4
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling structopt-derive v0.4.15
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling hashlink v0.7.0
[INFO] [stderr]    Compiling time v0.3.1
[INFO] [stderr]    Compiling rusqlite v0.25.3
[INFO] [stderr]    Compiling structopt v0.3.22
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling snafu v0.6.10
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/snafu-0.6.10/src/lib.rs:3:55
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![cfg_attr(feature = "unstable-backtraces-impl-std", feature(backtrace))]
[INFO] [stdout]   |                                                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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] error: could not compile `snafu` 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" "aa38311a08b8cb691a82d6c6e462d30e8a93675e8d14ec0122b9c64dc6729e8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa38311a08b8cb691a82d6c6e462d30e8a93675e8d14ec0122b9c64dc6729e8d", kill_on_drop: false }`
[INFO] [stdout] aa38311a08b8cb691a82d6c6e462d30e8a93675e8d14ec0122b9c64dc6729e8d