[INFO] cloning repository https://github.com/elba/elba
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/elba/elba" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Felba%2Felba", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Felba%2Felba'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a16b0c123ebe00b6b613587fc45aabc318430d71
[INFO] checking elba/elba against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Felba%2Felba" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/elba/elba on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/elba/elba
[INFO] finished tweaking git repo https://github.com/elba/elba
[INFO] tweaked toml for git repo https://github.com/elba/elba written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/elba/elba already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded slog-async v2.4.0
[INFO] [stderr]   Downloaded slog-term v2.5.0
[INFO] [stderr]   Downloaded openssl-src v111.9.0+1.1.1g
[INFO] [stderr]   Downloaded simsearch v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ce4a89db5166af66ec0b63c3050d29eea4fd1921a18baf1f20528d51ab22684c
[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" "ce4a89db5166af66ec0b63c3050d29eea4fd1921a18baf1f20528d51ab22684c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce4a89db5166af66ec0b63c3050d29eea4fd1921a18baf1f20528d51ab22684c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce4a89db5166af66ec0b63c3050d29eea4fd1921a18baf1f20528d51ab22684c", kill_on_drop: false }`
[INFO] [stdout] ce4a89db5166af66ec0b63c3050d29eea4fd1921a18baf1f20528d51ab22684c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=forbid" "-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4e11b106951ad6d24b50eb6dff7aeb43084ea2d450908634af13f89488b7d7f
[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" "a4e11b106951ad6d24b50eb6dff7aeb43084ea2d450908634af13f89488b7d7f", kill_on_drop: false }`
[INFO] [stderr]     Checking regex-syntax v0.6.16
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling slog v2.5.2
[INFO] [stderr]     Checking ascii v0.9.3
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking shell-escape v0.1.4
[INFO] [stderr]     Checking symlink v0.1.0
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]     Checking simsearch v0.2.0
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]     Checking encoding_rs v0.8.22
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking parking_lot_core v0.7.0
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]     Checking xattr v0.2.2
[INFO] [stderr]     Checking filetime v0.2.8
[INFO] [stderr]     Checking directories v1.0.2
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking crossbeam-epoch v0.6.1
[INFO] [stderr]     Checking crossbeam-epoch v0.5.2
[INFO] [stderr]     Checking aho-corasick v0.7.9
[INFO] [stderr]     Checking bstr v0.2.11
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking generic-array v0.9.0
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
[INFO] [stderr]     Checking nom v4.2.3
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking parking_lot v0.10.0
[INFO] [stderr]     Checking num-integer v0.1.42
[INFO] [stderr]     Checking tar v0.4.26
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]     Checking digest v0.7.6
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking crossbeam-deque v0.5.2
[INFO] [stderr]     Checking crossbeam-channel v0.4.2
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling openssl-src v111.9.0+1.1.1g
[INFO] [stderr]     Checking slog-async v2.4.0
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking tokio v0.2.13
[INFO] [stderr]     Checking sha2 v0.8.1
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling openssl-sys v0.9.54
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling backtrace-sys v0.1.33
[INFO] [stderr]    Compiling libssh2-sys v0.2.16
[INFO] [stderr]    Compiling libgit2-sys v0.11.0+0.99.0
[INFO] [stderr]     Checking slog-term v2.5.0
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]     Checking backtrace v0.3.41
[INFO] [stderr]     Checking serde-hjson v0.9.1
[INFO] [stderr]     Checking globset v0.4.4
[INFO] [stderr]     Checking Inflector v0.11.4
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]     Checking failure v0.1.7
[INFO] [stderr]     Checking semver_constraints v0.1.0
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking ignore v0.4.11
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking h2 v0.2.2
[INFO] [stderr]     Checking hyper v0.13.3
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling lexical-core v0.6.7
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking toml_edit v0.1.5
[INFO] [stderr]     Checking crossbeam-channel v0.2.6
[INFO] [stderr]     Checking crossbeam v0.4.1
[INFO] [stderr]     Checking nom v5.1.1
[INFO] [stderr]     Checking config v0.10.1
[INFO] [stderr]    Compiling openssl v0.10.28
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]     Checking git2 v0.12.0
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking reqwest v0.10.4
[INFO] [stderr]     Checking elba v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(label_break_value)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(label_break_value)]
[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 `elba`
[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] [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: build failed
[INFO] running `Command { std: "docker" "inspect" "a4e11b106951ad6d24b50eb6dff7aeb43084ea2d450908634af13f89488b7d7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4e11b106951ad6d24b50eb6dff7aeb43084ea2d450908634af13f89488b7d7f", kill_on_drop: false }`
[INFO] [stdout] a4e11b106951ad6d24b50eb6dff7aeb43084ea2d450908634af13f89488b7d7f