[INFO] cloning repository https://github.com/jwilm/racerd
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jwilm/racerd" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjwilm%2Fracerd", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjwilm%2Fracerd'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e3d380b9a1d3f3b67286d60465746bc89fea9098
[INFO] testing jwilm/racerd against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjwilm%2Fracerd" "/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/jwilm/racerd on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jwilm/racerd
[INFO] finished tweaking git repo https://github.com/jwilm/racerd
[INFO] tweaked toml for git repo https://github.com/jwilm/racerd written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/jwilm/racerd already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded racer-interner v0.1.0
[INFO] [stderr]   Downloaded annotate-snippets v0.6.1
[INFO] [stderr]   Downloaded rls-span v0.5.2
[INFO] [stderr]   Downloaded derive_more v0.13.0
[INFO] [stderr]   Downloaded rustc-ap-serialize v546.0.0
[INFO] [stderr]   Downloaded rustc-ap-graphviz v546.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_lexer v546.0.0
[INFO] [stderr]   Downloaded racer-cargo-metadata v0.1.1
[INFO] [stderr]   Downloaded rustc-ap-arena v546.0.0
[INFO] [stderr]   Downloaded rustc-ap-syntax v546.0.0
[INFO] [stderr]   Downloaded logger v0.4.0
[INFO] [stderr]   Downloaded iron-hmac v0.6.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_errors v546.0.0
[INFO] [stderr]   Downloaded jobserver v0.1.16
[INFO] [stderr]   Downloaded rustc-ap-syntax_pos v546.0.0
[INFO] [stderr]   Downloaded rustc-rayon-core v0.2.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_target v546.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_macros v546.0.0
[INFO] [stderr]   Downloaded rustc-rayon v0.2.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_data_structures v546.0.0
[INFO] [stderr]   Downloaded racer v2.1.25
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3209714b83a5493f9f6ab1a3bfe4ec310b52af712c1ed411dfd279da0e568a20
[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" "3209714b83a5493f9f6ab1a3bfe4ec310b52af712c1ed411dfd279da0e568a20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3209714b83a5493f9f6ab1a3bfe4ec310b52af712c1ed411dfd279da0e568a20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3209714b83a5493f9f6ab1a3bfe4ec310b52af712c1ed411dfd279da0e568a20", kill_on_drop: false }`
[INFO] [stdout] 3209714b83a5493f9f6ab1a3bfe4ec310b52af712c1ed411dfd279da0e568a20
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "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] aeaa31219e071529f82abe12dfce0e3844f08a4c8609bfedf78f854c5b6bf508
[INFO] running `Command { std: "docker" "start" "-a" "aeaa31219e071529f82abe12dfce0e3844f08a4c8609bfedf78f854c5b6bf508", 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] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.1
[INFO] [stderr]    Compiling syn v1.0.3
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rustc-rayon-core v0.2.0
[INFO] [stderr]    Compiling serde v1.0.99
[INFO] [stderr]    Compiling rustc-rayon v0.2.0
[INFO] [stderr]    Compiling safemem v0.3.2
[INFO] [stderr]    Compiling rustc-ap-graphviz v546.0.0
[INFO] [stderr]    Compiling modifier v0.1.0
[INFO] [stderr]    Compiling termcolor v1.0.5
[INFO] [stderr]    Compiling regex-syntax v0.6.11
[INFO] [stderr]    Compiling rustc-ap-rustc_target v546.0.0
[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/rustc-ap-graphviz-546.0.0/lib.rs:277:1
[INFO] [stdout]     |
[INFO] [stdout] 277 | #![feature(rustc_private, nll)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/smallvec-0.6.10/lib.rs:33:32
[INFO] [stdout]    |
[INFO] [stdout] 33 | #![cfg_attr(feature = "union", feature(untagged_unions))]
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/smallvec-0.6.10/lib.rs:35:37
[INFO] [stdout]    |
[INFO] [stdout] 35 | #![cfg_attr(feature = "may_dangle", feature(dropck_eyepatch))]
[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 `rustc-ap-graphviz` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 2 previous errors
[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" "aeaa31219e071529f82abe12dfce0e3844f08a4c8609bfedf78f854c5b6bf508", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aeaa31219e071529f82abe12dfce0e3844f08a4c8609bfedf78f854c5b6bf508", kill_on_drop: false }`
[INFO] [stdout] aeaa31219e071529f82abe12dfce0e3844f08a4c8609bfedf78f854c5b6bf508