[INFO] cloning repository https://github.com/RadicalZephyr/rust-tftp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RadicalZephyr/rust-tftp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRadicalZephyr%2Frust-tftp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRadicalZephyr%2Frust-tftp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3dd90b77d742bc6db997e2c702362baefa98419f
[INFO] documenting RadicalZephyr/rust-tftp 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%2FRadicalZephyr%2Frust-tftp" "/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/RadicalZephyr/rust-tftp 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/RadicalZephyr/rust-tftp
[INFO] finished tweaking git repo https://github.com/RadicalZephyr/rust-tftp
[INFO] tweaked toml for git repo https://github.com/RadicalZephyr/rust-tftp written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/RadicalZephyr/rust-tftp 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-uds v0.2.2
[INFO] [stderr]   Downloaded tokio v0.1.11
[INFO] [stderr]   Downloaded tokio-reactor v0.1.6
[INFO] [stderr]   Downloaded crossbeam-deque v0.6.1
[INFO] [stderr]   Downloaded tokio-udp v0.1.2
[INFO] [stderr]   Downloaded tokio-tcp v0.1.2
[INFO] [stderr]   Downloaded tokio-fs v0.1.3
[INFO] [stderr]   Downloaded tokio-current-thread v0.1.3
[INFO] [stderr]   Downloaded futures v0.1.24
[INFO] [stderr]   Downloaded bytes v0.4.10
[INFO] [stderr]   Downloaded tokio-io v0.1.9
[INFO] [stderr]   Downloaded tokio-timer v0.2.7
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.7
[INFO] [stderr]   Downloaded tokio-async-await v0.1.4
[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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d64cac651f716c52f613d2ad1460a3b7119b78a9bc4358da1af050d45c496bb8
[INFO] running `Command { std: "docker" "start" "-a" "d64cac651f716c52f613d2ad1460a3b7119b78a9bc4358da1af050d45c496bb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d64cac651f716c52f613d2ad1460a3b7119b78a9bc4358da1af050d45c496bb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d64cac651f716c52f613d2ad1460a3b7119b78a9bc4358da1af050d45c496bb8", kill_on_drop: false }`
[INFO] [stdout] d64cac651f716c52f613d2ad1460a3b7119b78a9bc4358da1af050d45c496bb8
[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" "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] 87090f9484a646aed7bbdee93a935828f7ab57cbc875a389d722fc56d7aeb974
[INFO] running `Command { std: "docker" "start" "-a" "87090f9484a646aed7bbdee93a935828f7ab57cbc875a389d722fc56d7aeb974", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]     Checking futures v0.1.24
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking byteorder v1.2.6
[INFO] [stderr]     Checking crossbeam-utils v0.5.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.20
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking smallvec v0.6.5
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking bytes v0.4.10
[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/futures-0.1.24/src/lib.rs:161:42
[INFO] [stdout]     |
[INFO] [stdout] 161 | #![cfg_attr(feature = "nightly", feature(pin))]
[INFO] [stdout]     |                                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking log v0.4.5
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking lock_api v0.1.4
[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 `futures` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "87090f9484a646aed7bbdee93a935828f7ab57cbc875a389d722fc56d7aeb974", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87090f9484a646aed7bbdee93a935828f7ab57cbc875a389d722fc56d7aeb974", kill_on_drop: false }`
[INFO] [stdout] 87090f9484a646aed7bbdee93a935828f7ab57cbc875a389d722fc56d7aeb974