[INFO] fetching crate vboxhelper 0.1.1...
[INFO] checking vboxhelper-0.1.1 against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] extracting crate vboxhelper 0.1.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate vboxhelper 0.1.1 on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vboxhelper 0.1.1
[INFO] finished tweaking crates.io crate vboxhelper 0.1.1
[INFO] tweaked toml for crates.io crate vboxhelper 0.1.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate vboxhelper 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded eui48 v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 09f0ee289754daa48a4d009dfe8311822bde95724063fa36eef6afe71c5c8ef2
[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" "09f0ee289754daa48a4d009dfe8311822bde95724063fa36eef6afe71c5c8ef2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09f0ee289754daa48a4d009dfe8311822bde95724063fa36eef6afe71c5c8ef2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09f0ee289754daa48a4d009dfe8311822bde95724063fa36eef6afe71c5c8ef2", kill_on_drop: false }`
[INFO] [stdout] 09f0ee289754daa48a4d009dfe8311822bde95724063fa36eef6afe71c5c8ef2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2bf8d7d987e988cfcca621b68a3525392f9f32a033c9f93d2ce135b8e615e7d
[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" "b2bf8d7d987e988cfcca621b68a3525392f9f32a033c9f93d2ce135b8e615e7d", kill_on_drop: false }`
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking eui48 v1.1.0
[INFO] [stderr]     Checking vboxhelper v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `root_uuid` is never read
[INFO] [stdout]    --> src/snapshot.rs:191:11
[INFO] [stdout]     |
[INFO] [stdout] 191 |   let mut root_uuid: Option<uuid::Uuid> = None;
[INFO] [stdout]     |           ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current_uuid` is never read
[INFO] [stdout]    --> src/snapshot.rs:192:11
[INFO] [stdout]     |
[INFO] [stdout] 192 |   let mut current_uuid: Option<uuid::Uuid> = None;
[INFO] [stdout]     |           ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `root_uuid` is never read
[INFO] [stdout]    --> src/snapshot.rs:191:11
[INFO] [stdout]     |
[INFO] [stdout] 191 |   let mut root_uuid: Option<uuid::Uuid> = None;
[INFO] [stdout]     |           ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current_uuid` is never read
[INFO] [stdout]    --> src/snapshot.rs:192:11
[INFO] [stdout]     |
[INFO] [stdout] 192 |   let mut current_uuid: Option<uuid::Uuid> = None;
[INFO] [stdout]     |           ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Keep`
[INFO] [stdout]  --> src/strutils.rs:3:3
[INFO] [stdout]   |
[INFO] [stdout] 3 |   Keep,
[INFO] [stdout]   |   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Keep`
[INFO] [stdout]  --> src/strutils.rs:3:3
[INFO] [stdout]   |
[INFO] [stdout] 3 |   Keep,
[INFO] [stdout]   |   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.61s
[INFO] running `Command { std: "docker" "inspect" "b2bf8d7d987e988cfcca621b68a3525392f9f32a033c9f93d2ce135b8e615e7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2bf8d7d987e988cfcca621b68a3525392f9f32a033c9f93d2ce135b8e615e7d", kill_on_drop: false }`
[INFO] [stdout] b2bf8d7d987e988cfcca621b68a3525392f9f32a033c9f93d2ce135b8e615e7d