[INFO] cloning repository https://github.com/DMSrs/dmsrs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DMSrs/dmsrs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDMSrs%2Fdmsrs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDMSrs%2Fdmsrs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e1112ccf256dbd14a6101cec7c74503ddbef89dc
[INFO] testing DMSrs/dmsrs against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDMSrs%2Fdmsrs" "/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/DMSrs/dmsrs on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DMSrs/dmsrs
[INFO] finished tweaking git repo https://github.com/DMSrs/dmsrs
[INFO] tweaked toml for git repo https://github.com/DMSrs/dmsrs written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/DMSrs/dmsrs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "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] f81b71b6b87b903d15aeff0a62675aa2046fe384a17ae566f1c6b5a05b5c063c
[INFO] running `Command { std: "docker" "start" "-a" "f81b71b6b87b903d15aeff0a62675aa2046fe384a17ae566f1c6b5a05b5c063c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f81b71b6b87b903d15aeff0a62675aa2046fe384a17ae566f1c6b5a05b5c063c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f81b71b6b87b903d15aeff0a62675aa2046fe384a17ae566f1c6b5a05b5c063c", kill_on_drop: false }`
[INFO] [stdout] f81b71b6b87b903d15aeff0a62675aa2046fe384a17ae566f1c6b5a05b5c063c
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e3ba796020fc04cefc878b01b6560e08995e6f664a7bd5a746319a44c2ba03ab
[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" "e3ba796020fc04cefc878b01b6560e08995e6f664a7bd5a746319a44c2ba03ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v0.1.4
[INFO] [stderr]    Compiling lazy_static v1.0.1
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]    Compiling serde v1.0.70
[INFO] [stderr]    Compiling unicode-normalization v0.1.7
[INFO] [stderr]    Compiling byteorder v1.2.3
[INFO] [stderr]    Compiling nodrop v0.1.12
[INFO] [stderr]    Compiling yansi v0.4.0
[INFO] [stderr]    Compiling pkg-config v0.3.11
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]    Compiling httparse v1.3.2
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling untrusted v0.5.1
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling constant_time_eq v0.1.3
[INFO] [stderr]    Compiling arrayref v0.3.4
[INFO] [stderr]    Compiling rustc-demangle v0.1.8
[INFO] [stderr]    Compiling pear v0.0.18
[INFO] [stderr]    Compiling state v0.4.1
[INFO] [stderr]    Compiling smallvec v0.6.2
[INFO] [stderr]    Compiling ordermap v0.2.13
[INFO] [stderr]    Compiling itoa v0.4.2
[INFO] [stderr]    Compiling bitflags v1.0.3
[INFO] [stderr]    Compiling askama_shared v0.7.0
[INFO] [stderr]    Compiling md5 v0.3.7
[INFO] [stderr]    Compiling fallible-iterator v0.1.4
[INFO] [stderr]    Compiling cairo-rs v0.3.0
[INFO] [stderr]    Compiling regex v1.0.1
[INFO] [stderr]    Compiling pest v1.0.6
[INFO] [stderr]    Compiling pest v0.3.3
[INFO] [stderr]    Compiling pest v0.4.1
[INFO] [stderr]    Compiling atomic v0.4.0
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling isatty v0.1.8
[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/atomic-0.4.0/src/lib.rs:36:26
[INFO] [stdout]    |
[INFO] [stdout] 36 |     feature = "nightly", feature(const_fn, cfg_target_has_atomic, integer_atomics, atomic_min_max)
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling log v0.4.3
[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 `atomic`
[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" "e3ba796020fc04cefc878b01b6560e08995e6f664a7bd5a746319a44c2ba03ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3ba796020fc04cefc878b01b6560e08995e6f664a7bd5a746319a44c2ba03ab", kill_on_drop: false }`
[INFO] [stdout] e3ba796020fc04cefc878b01b6560e08995e6f664a7bd5a746319a44c2ba03ab