[INFO] cloning repository https://github.com/walterpie/circus-backend
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/walterpie/circus-backend" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwalterpie%2Fcircus-backend", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwalterpie%2Fcircus-backend'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bb861e31e40b26dc3537d239a28f24aa35c646ee
[INFO] testing walterpie/circus-backend 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%2Fwalterpie%2Fcircus-backend" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/walterpie/circus-backend 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/walterpie/circus-backend
[INFO] finished tweaking git repo https://github.com/walterpie/circus-backend
[INFO] tweaked toml for git repo https://github.com/walterpie/circus-backend written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/walterpie/circus-backend 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]  Downloading crates ...
[INFO] [stderr]   Downloaded base64 v0.12.0
[INFO] [stderr]   Downloaded webpki v0.21.2
[INFO] [stderr]   Downloaded tokio-rustls v0.12.2
[INFO] [stderr]   Downloaded siphasher v0.3.2
[INFO] [stderr]   Downloaded postgres-protocol v0.5.1
[INFO] [stderr]   Downloaded postgres-native-tls v0.3.0
[INFO] [stderr]   Downloaded actix-identity v0.2.1
[INFO] [stderr]   Downloaded postgres-types v0.1.1
[INFO] [stderr]   Downloaded pancurses v0.16.1
[INFO] [stderr]   Downloaded async-trait v0.1.25
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.14
[INFO] [stderr]   Downloaded tokio-postgres v0.5.3
[INFO] [stderr]   Downloaded backtrace-sys v0.1.34
[INFO] [stderr]   Downloaded webpki-roots v0.17.0
[INFO] [stderr]   Downloaded pulldown-cmark v0.7.0
[INFO] [stderr]   Downloaded pdcurses-sys v0.7.1
[INFO] [stderr]   Downloaded ring v0.16.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stdout] c1b3a46f8e6ff8dddf9b20f9ff5ffd5f743b06e98b0dd25ac99410218ca1c1e0
[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" "c1b3a46f8e6ff8dddf9b20f9ff5ffd5f743b06e98b0dd25ac99410218ca1c1e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1b3a46f8e6ff8dddf9b20f9ff5ffd5f743b06e98b0dd25ac99410218ca1c1e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1b3a46f8e6ff8dddf9b20f9ff5ffd5f743b06e98b0dd25ac99410218ca1c1e0", kill_on_drop: false }`
[INFO] [stdout] c1b3a46f8e6ff8dddf9b20f9ff5ffd5f743b06e98b0dd25ac99410218ca1c1e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5a69f83cc11eff27788fda7f57617b3d9fc06e5092c4e3aef847a17f36c90064
[INFO] running `Command { std: "docker" "start" "-a" "5a69f83cc11eff27788fda7f57617b3d9fc06e5092c4e3aef847a17f36c90064", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling futures-sink v0.3.4
[INFO] [stderr]    Compiling proc-macro-hack v0.5.14
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling match_cfg v0.1.0
[INFO] [stderr]    Compiling openssl v0.10.28
[INFO] [stderr]    Compiling base64 v0.12.0
[INFO] [stderr]    Compiling md5 v0.7.0
[INFO] [stderr]    Compiling siphasher v0.3.2
[INFO] [stderr]    Compiling pulldown-cmark v0.7.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.12
[INFO] [stderr]    Compiling ring v0.16.12
[INFO] [stderr]    Compiling backtrace-sys v0.1.34
[INFO] [stderr]    Compiling brotli-sys v0.3.2
[INFO] [stderr]    Compiling bytestring v0.1.4
[INFO] [stderr]    Compiling ncurses v5.99.0
[INFO] [stderr]    Compiling http v0.2.0
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling futures-channel v0.3.4
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling hostname v0.3.1
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr]    Compiling resolv-conf v0.6.3
[INFO] [stderr]    Compiling sha2 v0.8.1
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling stringprep v0.1.2
[INFO] [stderr]    Compiling pancurses v0.16.1
[INFO] [stderr]    Compiling backtrace v0.3.45
[INFO] [stderr]    Compiling postgres-protocol v0.5.1
[INFO] [stderr]    Compiling url v2.1.1
[INFO] [stderr]    Compiling postgres-types v0.1.1
[INFO] [stderr]    Compiling webpki v0.21.2
[INFO] [stderr]    Compiling sct v0.6.0
[INFO] [stderr]    Compiling rustls v0.16.0
[INFO] [stderr]    Compiling webpki-roots v0.17.0
[INFO] [stderr]    Compiling brotli2 v0.3.2
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]    Compiling derive_more v0.99.3
[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[INFO] [stderr]    Compiling actix-macros v0.1.1
[INFO] [stderr]    Compiling async-trait v0.1.25
[INFO] [stderr]    Compiling enum-as-inner v0.3.2
[INFO] [stderr]    Compiling actix-web-codegen v0.2.1
[INFO] [stderr]    Compiling tokio v0.2.13
[INFO] [stderr]    Compiling failure v0.1.7
[INFO] [stderr]    Compiling futures-util v0.3.4
[INFO] [stderr]    Compiling pin-project v0.4.8
[INFO] [stderr]    Compiling futures-executor v0.3.4
[INFO] [stderr]    Compiling actix-service v1.0.5
[INFO] [stderr]    Compiling actix-threadpool v0.3.1
[INFO] [stderr]    Compiling futures v0.3.4
[INFO] [stderr]    Compiling tokio-util v0.2.0
[INFO] [stderr]    Compiling actix-rt v1.0.0
[INFO] [stderr]    Compiling tokio-rustls v0.12.2
[INFO] [stderr]    Compiling trust-dns-proto v0.18.0-alpha.2
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling tokio-tls v0.3.0
[INFO] [stderr]    Compiling tokio-postgres v0.5.3
[INFO] [stderr]    Compiling actix-codec v0.2.0
[INFO] [stderr]    Compiling h2 v0.2.2
[INFO] [stderr]    Compiling actix-utils v1.0.6
[INFO] [stderr]    Compiling actix-tls v1.0.0
[INFO] [stderr]    Compiling actix-server v1.0.2
[INFO] [stderr]    Compiling trust-dns-resolver v0.18.0-alpha.2
[INFO] [stderr]    Compiling actix-testing v1.0.0
[INFO] [stderr]    Compiling postgres-native-tls v0.3.0
[INFO] [stderr]    Compiling actix-connect v1.0.2
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling serde_urlencoded v0.6.1
[INFO] [stderr]    Compiling arrayvec v0.5.1
[INFO] [stderr]    Compiling actix-router v0.2.4
[INFO] [stderr]    Compiling ron v0.5.1
[INFO] [stderr]    Compiling blake2b_simd v0.5.10
[INFO] [stderr]    Compiling actix-http v1.0.1
[INFO] [stderr]    Compiling rust-argon2 v0.8.2
[INFO] [stderr]    Compiling awc v1.0.1
[INFO] [stderr]    Compiling actix-web v2.0.0
[INFO] [stderr]    Compiling actix-identity v0.2.1
[INFO] [stderr]    Compiling circus-backend v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[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 `circus-backend`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "5a69f83cc11eff27788fda7f57617b3d9fc06e5092c4e3aef847a17f36c90064", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a69f83cc11eff27788fda7f57617b3d9fc06e5092c4e3aef847a17f36c90064", kill_on_drop: false }`
[INFO] [stdout] 5a69f83cc11eff27788fda7f57617b3d9fc06e5092c4e3aef847a17f36c90064