[INFO] fetching crate vhost-user-backend 0.15.0...
[INFO] checking vhost-user-backend-0.15.0 against master#a83f933a9da258cf037e3cab37cd486bfd861a7d for pr-125384-1
[INFO] extracting crate vhost-user-backend 0.15.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate vhost-user-backend 0.15.0 on toolchain a83f933a9da258cf037e3cab37cd486bfd861a7d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a83f933a9da258cf037e3cab37cd486bfd861a7d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vhost-user-backend 0.15.0
[INFO] finished tweaking crates.io crate vhost-user-backend 0.15.0
[INFO] tweaked toml for crates.io crate vhost-user-backend 0.15.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a83f933a9da258cf037e3cab37cd486bfd861a7d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 59 packages to latest compatible versions
[INFO] [stderr]       Adding bindgen v0.68.1 (latest: v0.69.4)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding cfg_aliases v0.1.1 (latest: v0.2.1)
[INFO] [stderr]       Adding linux-raw-sys v0.4.14 (latest: v0.6.4)
[INFO] [stderr]       Adding nix v0.27.1 (latest: v0.29.0)
[INFO] [stderr]       Adding nix v0.28.0 (latest: v0.29.0)
[INFO] [stderr]       Adding peeking_take_while v0.1.2 (latest: v1.0.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a83f933a9da258cf037e3cab37cd486bfd861a7d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded virtio-bindings v0.2.2
[INFO] [stderr]   Downloaded userfaultfd-sys v0.5.0
[INFO] [stderr]   Downloaded userfaultfd v0.8.1
[INFO] [stderr]   Downloaded vmm-sys-util v0.12.1
[INFO] [stderr]   Downloaded virtio-queue v0.12.0
[INFO] [stderr]   Downloaded bindgen v0.68.1
[INFO] [stderr]   Downloaded nix v0.27.1
[INFO] [stderr]   Downloaded vhost v0.11.0
[INFO] [stderr]   Downloaded vm-memory v0.14.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+a83f933a9da258cf037e3cab37cd486bfd861a7d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 579cd79e5d7499a0e29d1230e27fd003f7e99e996599aa898dbbdb6a356e134a
[INFO] running `Command { std: "docker" "start" "-a" "579cd79e5d7499a0e29d1230e27fd003f7e99e996599aa898dbbdb6a356e134a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "579cd79e5d7499a0e29d1230e27fd003f7e99e996599aa898dbbdb6a356e134a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "579cd79e5d7499a0e29d1230e27fd003f7e99e996599aa898dbbdb6a356e134a", kill_on_drop: false }`
[INFO] [stdout] 579cd79e5d7499a0e29d1230e27fd003f7e99e996599aa898dbbdb6a356e134a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+a83f933a9da258cf037e3cab37cd486bfd861a7d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 702007b65d2864795c44a01f057bfe3f69484bd9fb9ca7ccc164aa737f0b117d
[INFO] running `Command { std: "docker" "start" "-a" "702007b65d2864795c44a01f057bfe3f69484bd9fb9ca7ccc164aa737f0b117d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]     Checking arc-swap v1.7.1
[INFO] [stderr]    Compiling cfg_aliases v0.1.1
[INFO] [stderr]     Checking virtio-bindings v0.2.2
[INFO] [stderr]    Compiling nix v0.28.0
[INFO] [stderr]     Checking vmm-sys-util v0.12.1
[INFO] [stderr]     Checking vm-memory v0.14.1
[INFO] [stderr]     Checking virtio-queue v0.12.0
[INFO] [stderr]     Checking vhost v0.11.0
[INFO] [stderr]     Checking vhost-user-backend v0.15.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.54s
[INFO] running `Command { std: "docker" "inspect" "702007b65d2864795c44a01f057bfe3f69484bd9fb9ca7ccc164aa737f0b117d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "702007b65d2864795c44a01f057bfe3f69484bd9fb9ca7ccc164aa737f0b117d", kill_on_drop: false }`
[INFO] [stdout] 702007b65d2864795c44a01f057bfe3f69484bd9fb9ca7ccc164aa737f0b117d