[INFO] fetching crate uhyve 0.0.27...
[INFO] checking uhyve-0.0.27 against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] extracting crate uhyve 0.0.27 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate uhyve 0.0.27 on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-7/source/rust-toolchain
[INFO] started tweaking crates.io crate uhyve 0.0.27
[INFO] finished tweaking crates.io crate uhyve 0.0.27
[INFO] tweaked toml for crates.io crate uhyve 0.0.27 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate uhyve 0.0.27 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3254994bd7862896952663da180e8c87ce80e433905acdf5bdbf8de772316760
[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" "3254994bd7862896952663da180e8c87ce80e433905acdf5bdbf8de772316760", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3254994bd7862896952663da180e8c87ce80e433905acdf5bdbf8de772316760", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3254994bd7862896952663da180e8c87ce80e433905acdf5bdbf8de772316760", kill_on_drop: false }`
[INFO] [stdout] 3254994bd7862896952663da180e8c87ce80e433905acdf5bdbf8de772316760
[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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7344b54f2b3314ab61e3b2eb1fc063b955b6eda7d6076364a661b13b257ea08
[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" "a7344b54f2b3314ab61e3b2eb1fc063b955b6eda7d6076364a661b13b257ea08", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling const_fn v0.4.4
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling log v0.4.13
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling mac_address v1.1.1
[INFO] [stderr]    Compiling x86 v0.35.0
[INFO] [stderr]    Compiling serde_json v1.0.60
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking plain v0.2.3
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking humantime v2.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]     Checking virtio-bindings v0.1.0
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking strum v0.20.0
[INFO] [stderr]     Checking half v1.6.0
[INFO] [stderr]     Checking burst v0.0.2
[INFO] [stderr]    Compiling tun-tap v0.1.2
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking raw-cpuid v9.0.0
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking gdb-protocol v0.1.0
[INFO] [stderr]    Compiling raw-cpuid v8.1.2
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking vmm-sys-util v0.7.0
[INFO] [stderr]     Checking nix v0.19.1
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking aligned_alloc v0.1.3
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking core_affinity v0.5.10
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]     Checking env_logger v0.8.2
[INFO] [stderr]     Checking kvm-bindings v0.3.0
[INFO] [stderr]     Checking kvm-ioctls v0.6.0
[INFO] [stderr]     Checking bstr v0.2.14
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking csv v1.1.5
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]    Compiling scroll_derive v0.10.4
[INFO] [stderr]    Compiling strum_macros v0.20.1
[INFO] [stderr]     Checking scroll v0.10.2
[INFO] [stderr]     Checking goblin v0.3.1
[INFO] [stderr]     Checking uhyve v0.0.27 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `ret`
[INFO] [stdout]    --> src/vm.rs:196:2
[INFO] [stdout]     |
[INFO] [stdout] 196 |     ret: i32,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stdout] warning: field is never read: `ret`
[INFO] [stdout]    --> src/vm.rs:196:2
[INFO] [stdout]     |
[INFO] [stdout] 196 |     ret: i32,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 03s
[INFO] running `Command { std: "docker" "inspect" "a7344b54f2b3314ab61e3b2eb1fc063b955b6eda7d6076364a661b13b257ea08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7344b54f2b3314ab61e3b2eb1fc063b955b6eda7d6076364a661b13b257ea08", kill_on_drop: false }`
[INFO] [stdout] a7344b54f2b3314ab61e3b2eb1fc063b955b6eda7d6076364a661b13b257ea08