[INFO] cloning repository https://github.com/arcnmx/youmu
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arcnmx/youmu" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farcnmx%2Fyoumu", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farcnmx%2Fyoumu'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5aac81b1353a093b12e027cdeedc52f0866b2df0
[INFO] checking arcnmx/youmu against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farcnmx%2Fyoumu" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/arcnmx/youmu on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/arcnmx/youmu
[INFO] finished tweaking git repo https://github.com/arcnmx/youmu
[INFO] tweaked toml for git repo https://github.com/arcnmx/youmu written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/arcnmx/youmu already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-12/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[INFO] the lockfile is outdated, regenerating it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" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 235f62678666c2e450449f7dc09c4ae22216271e77b9352bc3af2ec73325954c
[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" "235f62678666c2e450449f7dc09c4ae22216271e77b9352bc3af2ec73325954c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "235f62678666c2e450449f7dc09c4ae22216271e77b9352bc3af2ec73325954c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "235f62678666c2e450449f7dc09c4ae22216271e77b9352bc3af2ec73325954c", kill_on_drop: false }`
[INFO] [stdout] 235f62678666c2e450449f7dc09c4ae22216271e77b9352bc3af2ec73325954c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--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] c81d61d146807811438ac75230ecbe4722b97a63626cd6552f6f74a5764e49d9
[INFO] running `Command { std: "docker" "start" "-a" "c81d61d146807811438ac75230ecbe4722b97a63626cd6552f6f74a5764e49d9", 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 v0.4.0`
[INFO] [stderr]     ... which is depended on by `youmu 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 v0.4.0`
[INFO] [stderr]     ... which is depended on by `youmu v0.0.1 (/opt/rustwide/workdir)`
[INFO] [stderr] also links to native library `z`
[INFO] running `Command { std: "docker" "inspect" "c81d61d146807811438ac75230ecbe4722b97a63626cd6552f6f74a5764e49d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c81d61d146807811438ac75230ecbe4722b97a63626cd6552f6f74a5764e49d9", kill_on_drop: false }`
[INFO] [stdout] c81d61d146807811438ac75230ecbe4722b97a63626cd6552f6f74a5764e49d9