[INFO] fetching crate mimemagic 0.1.0...
[INFO] checking mimemagic-0.1.0 against beta for pr-78714
[INFO] extracting crate mimemagic 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate mimemagic 0.1.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mimemagic 0.1.0
[INFO] finished tweaking crates.io crate mimemagic 0.1.0
[INFO] tweaked toml for crates.io crate mimemagic 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate mimemagic 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 128a90033edb460ab05ece8fff4dbeb809cf8c2cd0de2357663beb81e5adf219
[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" "128a90033edb460ab05ece8fff4dbeb809cf8c2cd0de2357663beb81e5adf219", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "128a90033edb460ab05ece8fff4dbeb809cf8c2cd0de2357663beb81e5adf219", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "128a90033edb460ab05ece8fff4dbeb809cf8c2cd0de2357663beb81e5adf219", kill_on_drop: false }`
[INFO] [stdout] 128a90033edb460ab05ece8fff4dbeb809cf8c2cd0de2357663beb81e5adf219
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa3c03c042857f2679d0c3f120c6df3581f0be6a7bfb418af0f945fc9bae23d1
[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" "fa3c03c042857f2679d0c3f120c6df3581f0be6a7bfb418af0f945fc9bae23d1", kill_on_drop: false }`
[INFO] [stderr]    Compiling quick-xml v0.17.2
[INFO] [stderr]    Compiling mimemagic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.02s
[INFO] running `Command { std: "docker" "inspect" "fa3c03c042857f2679d0c3f120c6df3581f0be6a7bfb418af0f945fc9bae23d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa3c03c042857f2679d0c3f120c6df3581f0be6a7bfb418af0f945fc9bae23d1", kill_on_drop: false }`
[INFO] [stdout] fa3c03c042857f2679d0c3f120c6df3581f0be6a7bfb418af0f945fc9bae23d1