[INFO] cloning repository https://github.com/JacksonCoder/sert-attendance-client
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JacksonCoder/sert-attendance-client" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJacksonCoder%2Fsert-attendance-client", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJacksonCoder%2Fsert-attendance-client'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ade0c1e8cd5cca48a0f3a6ed666010aef509559a
[INFO] testing JacksonCoder/sert-attendance-client against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJacksonCoder%2Fsert-attendance-client" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JacksonCoder/sert-attendance-client on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JacksonCoder/sert-attendance-client
[INFO] finished tweaking git repo https://github.com/JacksonCoder/sert-attendance-client
[INFO] tweaked toml for git repo https://github.com/JacksonCoder/sert-attendance-client written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/JacksonCoder/sert-attendance-client already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", 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] 43651033ad56ab88b887ee88b649e53a21dc4db60bafb43d095ac470bbef5ada
[INFO] running `Command { std: "docker" "start" "-a" "43651033ad56ab88b887ee88b649e53a21dc4db60bafb43d095ac470bbef5ada", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43651033ad56ab88b887ee88b649e53a21dc4db60bafb43d095ac470bbef5ada", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43651033ad56ab88b887ee88b649e53a21dc4db60bafb43d095ac470bbef5ada", kill_on_drop: false }`
[INFO] [stdout] 43651033ad56ab88b887ee88b649e53a21dc4db60bafb43d095ac470bbef5ada
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e4b318af0df9906633a7aa0c2f0bf6ddd1d111da8cabc3dc27a3e50dcef01a2
[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" "5e4b318af0df9906633a7aa0c2f0bf6ddd1d111da8cabc3dc27a3e50dcef01a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.36
[INFO] [stderr]    Compiling nodrop v0.1.12
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling yansi v0.3.4
[INFO] [stderr]    Compiling lazy_static v1.0.0
[INFO] [stderr]    Compiling cc v1.0.4
[INFO] [stderr]    Compiling byteorder v1.2.1
[INFO] [stderr]    Compiling untrusted v0.5.1
[INFO] [stderr]    Compiling httparse v1.2.4
[INFO] [stderr]    Compiling serde v1.0.27
[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 ordermap v0.2.13
[INFO] [stderr]    Compiling smallvec v0.4.4
[INFO] [stderr]    Compiling slab v0.3.0
[INFO] [stderr]    Compiling lazycell v0.6.0
[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 `yansi`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5e4b318af0df9906633a7aa0c2f0bf6ddd1d111da8cabc3dc27a3e50dcef01a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e4b318af0df9906633a7aa0c2f0bf6ddd1d111da8cabc3dc27a3e50dcef01a2", kill_on_drop: false }`
[INFO] [stdout] 5e4b318af0df9906633a7aa0c2f0bf6ddd1d111da8cabc3dc27a3e50dcef01a2