[INFO] cloning repository https://github.com/ayrat555/el_monitorro
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ayrat555/el_monitorro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fayrat555%2Fel_monitorro", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fayrat555%2Fel_monitorro'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c8c9ea3a6b559679e571696c4c772646e59a184d
[INFO] testing ayrat555/el_monitorro against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fayrat555%2Fel_monitorro" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ayrat555/el_monitorro 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/ayrat555/el_monitorro
[INFO] finished tweaking git repo https://github.com/ayrat555/el_monitorro
[INFO] tweaked toml for git repo https://github.com/ayrat555/el_monitorro written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/ayrat555/el_monitorro 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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1a561c6273a8b6d83027559317348cab89c98e8bf2b08c4114a18b9bb12cdda2
[INFO] running `Command { std: "docker" "start" "-a" "1a561c6273a8b6d83027559317348cab89c98e8bf2b08c4114a18b9bb12cdda2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a561c6273a8b6d83027559317348cab89c98e8bf2b08c4114a18b9bb12cdda2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a561c6273a8b6d83027559317348cab89c98e8bf2b08c4114a18b9bb12cdda2", kill_on_drop: false }`
[INFO] [stdout] 1a561c6273a8b6d83027559317348cab89c98e8bf2b08c4114a18b9bb12cdda2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c0123545c3a3db069554f3fa0fe03a5ac8bc46e9ef67fd30f23aa60ef607b3a5
[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" "c0123545c3a3db069554f3fa0fe03a5ac8bc46e9ef67fd30f23aa60ef607b3a5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling cc v1.0.70
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling siphasher v0.3.7
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]    Compiling utf-8 v0.7.6
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling pin-project-lite v0.2.7
[INFO] [stderr]    Compiling erased-serde v0.3.16
[INFO] [stderr]    Compiling pq-sys v0.4.6
[INFO] [stderr]    Compiling unicode-bidi v0.3.6
[INFO] [stderr]    Compiling derive_builder v0.9.0
[INFO] [stderr]    Compiling inventory v0.1.10
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling futures-io v0.3.17
[INFO] [stderr]    Compiling curl v0.4.38
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling openssl-probe v0.1.4
[INFO] [stderr]    Compiling fastrand v1.5.0
[INFO] [stderr]    Compiling isahc v1.5.0
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling slab v0.4.4
[INFO] [stderr]    Compiling quick-error v2.0.1
[INFO] [stderr]    Compiling never v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling instant v0.1.10
[INFO] [stderr]    Compiling tracing-core v0.1.19
[INFO] [stderr]    Compiling tokio v1.11.0
[INFO] [stderr]    Compiling lock_api v0.4.5
[INFO] [stderr]    Compiling futf v0.1.4
[INFO] [stderr]    Compiling tinyvec v1.3.1
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling http v0.2.4
[INFO] [stderr]    Compiling tendril v0.4.2
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr]    Compiling async-channel v1.6.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling sluice v0.5.5
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling openssl-sys v0.9.66
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.6+1.43.0
[INFO] [stderr]    Compiling curl-sys v0.4.45+curl-7.78.0
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling futures-lite v1.12.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling socket2 v0.4.1
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling polling v2.1.0
[INFO] [stderr]    Compiling mio v0.7.13
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling quick-xml v0.20.0
[INFO] [stderr]    Compiling quick-xml v0.22.0
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling chrono v0.4.19
[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/regex-1.5.4/src/lib.rs:609:34
[INFO] [stdout]     |
[INFO] [stdout] 609 | #![cfg_attr(feature = "pattern", feature(pattern))]
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling scheduled-thread-pool v0.2.5
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling rand v0.7.3
[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 `regex` 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" "c0123545c3a3db069554f3fa0fe03a5ac8bc46e9ef67fd30f23aa60ef607b3a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0123545c3a3db069554f3fa0fe03a5ac8bc46e9ef67fd30f23aa60ef607b3a5", kill_on_drop: false }`
[INFO] [stdout] c0123545c3a3db069554f3fa0fe03a5ac8bc46e9ef67fd30f23aa60ef607b3a5