[INFO] cloning repository https://github.com/Gustorn/tsp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Gustorn/tsp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGustorn%2Ftsp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGustorn%2Ftsp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 096a391667eb5b12d3abbfdff5fe277a657f9a87
[INFO] testing Gustorn/tsp against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGustorn%2Ftsp" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Gustorn/tsp 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/Gustorn/tsp
[INFO] finished tweaking git repo https://github.com/Gustorn/tsp
[INFO] tweaked toml for git repo https://github.com/Gustorn/tsp written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Gustorn/tsp 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stdout] 2f1941f52502de63a2b7c368dfd1bd0ffc9bed95e41753b94954e43f8ace1221
[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" "2f1941f52502de63a2b7c368dfd1bd0ffc9bed95e41753b94954e43f8ace1221", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f1941f52502de63a2b7c368dfd1bd0ffc9bed95e41753b94954e43f8ace1221", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f1941f52502de63a2b7c368dfd1bd0ffc9bed95e41753b94954e43f8ace1221", kill_on_drop: false }`
[INFO] [stdout] 2f1941f52502de63a2b7c368dfd1bd0ffc9bed95e41753b94954e43f8ace1221
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 99bc1abb4985f3cf7c90d4c702ee83c7df6291d540fada39a0a8210032dd1824
[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" "99bc1abb4985f3cf7c90d4c702ee83c7df6291d540fada39a0a8210032dd1824", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi v0.2.5
[INFO] [stderr]    Compiling libc v0.2.4
[INFO] [stderr]    Compiling cast v0.0.0 (https://github.com/japaric/cast.rs#34ee2159)
[INFO] [stderr]    Compiling itertools v0.4.4
[INFO] [stderr]    Compiling kernel32-sys v0.2.1
[INFO] [stderr]    Compiling advapi32-sys v0.1.2
[INFO] [stderr]    Compiling float v0.0.0 (https://github.com/japaric/float.rs#6f1ad86a)
[INFO] [stderr]    Compiling approx v0.0.0 (https://github.com/japaric/approx.rs#7f3d5147)
[INFO] [stderr]    Compiling time v0.1.34
[INFO] [stderr]    Compiling rand v0.3.12
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/approx.rs-39c842a0a84d5e90/7f3d514/src/lib.rs:64:1
[INFO] [stdout]    |
[INFO] [stdout] 64 | #![feature(plugin)]
[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 `approx` 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" "99bc1abb4985f3cf7c90d4c702ee83c7df6291d540fada39a0a8210032dd1824", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99bc1abb4985f3cf7c90d4c702ee83c7df6291d540fada39a0a8210032dd1824", kill_on_drop: false }`
[INFO] [stdout] 99bc1abb4985f3cf7c90d4c702ee83c7df6291d540fada39a0a8210032dd1824