[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] documenting Gustorn/tsp against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGustorn%2Ftsp" "/workspace/builds/worker-37/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-37/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Gustorn/tsp on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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-37/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" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/japaric/approx.rs`
[INFO] [stderr]     Updating git repository `https://github.com/japaric/float.rs`
[INFO] [stderr]     Updating git repository `https://github.com/japaric/cast.rs`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded itertools v0.4.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e91c11dc67048437bce9a42005a556a24f04914d66b39cb8036faaa13b31ee5f
[INFO] running `Command { std: "docker" "start" "-a" "e91c11dc67048437bce9a42005a556a24f04914d66b39cb8036faaa13b31ee5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e91c11dc67048437bce9a42005a556a24f04914d66b39cb8036faaa13b31ee5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e91c11dc67048437bce9a42005a556a24f04914d66b39cb8036faaa13b31ee5f", kill_on_drop: false }`
[INFO] [stdout] e91c11dc67048437bce9a42005a556a24f04914d66b39cb8036faaa13b31ee5f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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" "RUSTDOCFLAGS=--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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 83645f463a465645116a8ece2c64a039abc13cec2c1604397c331dd325fbd97e
[INFO] running `Command { std: "docker" "start" "-a" "83645f463a465645116a8ece2c64a039abc13cec2c1604397c331dd325fbd97e", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.5
[INFO] [stderr]     Checking libc v0.2.4
[INFO] [stderr]     Checking cast v0.0.0 (https://github.com/japaric/cast.rs#34ee2159)
[INFO] [stderr]     Checking linear-map v0.0.4
[INFO] [stderr]     Checking itertools v0.4.4
[INFO] [stderr]     Checking float v0.0.0 (https://github.com/japaric/float.rs#6f1ad86a)
[INFO] [stderr]    Compiling kernel32-sys v0.2.1
[INFO] [stderr]    Compiling advapi32-sys v0.1.2
[INFO] [stderr]     Checking approx v0.0.0 (https://github.com/japaric/approx.rs#7f3d5147)
[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] running `Command { std: "docker" "inspect" "83645f463a465645116a8ece2c64a039abc13cec2c1604397c331dd325fbd97e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83645f463a465645116a8ece2c64a039abc13cec2c1604397c331dd325fbd97e", kill_on_drop: false }`
[INFO] [stdout] 83645f463a465645116a8ece2c64a039abc13cec2c1604397c331dd325fbd97e