[INFO] updating cached repository https://github.com/crsaracco/musicbrainz-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a7f8ccc81bb0aa2fd5a9382a09e3df60b41e16a3
[INFO] checking crsaracco/musicbrainz-rs against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrsaracco%2Fmusicbrainz-rs" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/crsaracco/musicbrainz-rs on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/crsaracco/musicbrainz-rs
[INFO] finished tweaking git repo https://github.com/crsaracco/musicbrainz-rs
[INFO] tweaked toml for git repo https://github.com/crsaracco/musicbrainz-rs written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/crsaracco/musicbrainz-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d0f42f5bffbaaeeab9bb33716b246d62cf945803472880765ee3ab2fec4eb303
[INFO] running `"docker" "start" "-a" "d0f42f5bffbaaeeab9bb33716b246d62cf945803472880765ee3ab2fec4eb303"`
[INFO] [stderr]     Checking ratelimit v0.4.4
[INFO] [stderr]     Checking rand_os v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]     Checking tokio-timer v0.2.8
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]     Checking serde_json v1.0.35
[INFO] [stderr]     Checking tokio-io v0.1.11
[INFO] [stderr]     Checking serde_urlencoded v0.5.4
[INFO] [stderr]     Checking rand v0.6.4
[INFO] [stderr]     Checking h2 v0.1.15
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]     Checking crossbeam-channel v0.3.6
[INFO] [stderr]     Checking tokio-reactor v0.1.8
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]     Checking tokio-threadpool v0.1.10
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio v0.1.14
[INFO] [stderr]     Checking hyper v0.12.20
[INFO] [stderr]     Checking hyper-tls v0.3.1
[INFO] [stderr]     Checking reqwest v0.9.8
[INFO] [stderr]     Checking musicbrainz-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 54.45s
[INFO] running `"docker" "inspect" "d0f42f5bffbaaeeab9bb33716b246d62cf945803472880765ee3ab2fec4eb303"`
[INFO] running `"docker" "rm" "-f" "d0f42f5bffbaaeeab9bb33716b246d62cf945803472880765ee3ab2fec4eb303"`
[INFO] [stdout] d0f42f5bffbaaeeab9bb33716b246d62cf945803472880765ee3ab2fec4eb303