[INFO] cloning repository https://github.com/mayflower/duck
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mayflower/duck" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmayflower%2Fduck", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmayflower%2Fduck'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e5c1ee04dca9284ee552f5925ec511e4c9b2dd81
[INFO] checking mayflower/duck against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmayflower%2Fduck" "/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/mayflower/duck on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mayflower/duck
[INFO] finished tweaking git repo https://github.com/mayflower/duck
[INFO] tweaked toml for git repo https://github.com/mayflower/duck written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/mayflower/duck already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /workspace/builds/worker-6/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syncbox v0.2.4
[INFO] [stderr]   Downloaded crates-io v0.1.0
[INFO] [stderr]   Downloaded eventual v0.1.7
[INFO] [stderr]   Downloaded git2 v0.2.14
[INFO] [stderr]   Downloaded hyper v0.7.2
[INFO] [stderr]   Downloaded libz-sys v0.1.9
[INFO] [stderr]   Downloaded libgit2-sys v0.2.20
[INFO] [stderr]   Downloaded threadpool v0.1.4
[INFO] [stderr]   Downloaded git2-curl v0.2.4
[INFO] [stderr]   Downloaded puppetfile v0.2.2
[INFO] [stderr]   Downloaded libssh2-sys v0.1.41
[INFO] [stderr]   Downloaded cargo v0.5.0
[INFO] [stderr]   Downloaded tar v0.3.4
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 61532b72e443649431a711c2d0376e5dca21471747ab05e25ec3b89f8f779edd
[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" "61532b72e443649431a711c2d0376e5dca21471747ab05e25ec3b89f8f779edd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61532b72e443649431a711c2d0376e5dca21471747ab05e25ec3b89f8f779edd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61532b72e443649431a711c2d0376e5dca21471747ab05e25ec3b89f8f779edd", kill_on_drop: false }`
[INFO] [stdout] 61532b72e443649431a711c2d0376e5dca21471747ab05e25ec3b89f8f779edd
[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=forbid" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8154badd49fb5d85d711298120010fc39fee6ad426ec9977cbf13c628d91dda
[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" "b8154badd49fb5d85d711298120010fc39fee6ad426ec9977cbf13c628d91dda", kill_on_drop: false }`
[INFO] [stderr] error: multiple packages link to native library `z`, but a native library can be linked only once
[INFO] [stderr] 
[INFO] [stderr] package `libz-sys v0.1.9`
[INFO] [stderr]     ... which is depended on by `libgit2-sys v0.2.20`
[INFO] [stderr]     ... which is depended on by `cargo v0.5.0`
[INFO] [stderr]     ... which is depended on by `duck v0.0.1 (/opt/rustwide/workdir)`
[INFO] [stderr] links to native library `z`
[INFO] [stderr] 
[INFO] [stderr] package `libz-sys v1.1.2`
[INFO] [stderr]     ... which is depended on by `curl-sys v0.1.35`
[INFO] [stderr]     ... which is depended on by `curl v0.2.19`
[INFO] [stderr]     ... which is depended on by `cargo v0.5.0`
[INFO] [stderr]     ... which is depended on by `duck v0.0.1 (/opt/rustwide/workdir)`
[INFO] [stderr] also links to native library `z`
[INFO] running `Command { std: "docker" "inspect" "b8154badd49fb5d85d711298120010fc39fee6ad426ec9977cbf13c628d91dda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8154badd49fb5d85d711298120010fc39fee6ad426ec9977cbf13c628d91dda", kill_on_drop: false }`
[INFO] [stdout] b8154badd49fb5d85d711298120010fc39fee6ad426ec9977cbf13c628d91dda