[INFO] fetching crate vboxhelper 0.2.0...
[INFO] checking vboxhelper-0.2.0 against try#3bb2879ea9e58d65b875f9a98df44f4a43ce2597 for pr-85387
[INFO] extracting crate vboxhelper 0.2.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate vboxhelper 0.2.0 on toolchain 3bb2879ea9e58d65b875f9a98df44f4a43ce2597
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vboxhelper 0.2.0
[INFO] finished tweaking crates.io crate vboxhelper 0.2.0
[INFO] tweaked toml for crates.io crate vboxhelper 0.2.0 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate vboxhelper 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "fetch" "--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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 23526080b79805d131086048ccf3553e912d96aa7a2b9efb9ca0446a6401292b
[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" "23526080b79805d131086048ccf3553e912d96aa7a2b9efb9ca0446a6401292b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23526080b79805d131086048ccf3553e912d96aa7a2b9efb9ca0446a6401292b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23526080b79805d131086048ccf3553e912d96aa7a2b9efb9ca0446a6401292b", kill_on_drop: false }`
[INFO] [stdout] 23526080b79805d131086048ccf3553e912d96aa7a2b9efb9ca0446a6401292b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4a8b57ea6db79a15b052724956be94342dff316ea73ac9b0cabbd54aa503093
[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" "a4a8b57ea6db79a15b052724956be94342dff316ea73ac9b0cabbd54aa503093", kill_on_drop: false }`
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking eui48 v1.1.0
[INFO] [stderr]     Checking vboxhelper v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `re_ml1`
[INFO] [stdout]    --> src/lib.rs:207:7
[INFO] [stdout]     |
[INFO] [stdout] 207 |   let re_ml1 = Regex::new(r#"^(?P<key>[^"=]+)="(?P<val>[^"=]*)"$"#).unwrap();
[INFO] [stdout]     |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_re_ml1`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `re_ml1`
[INFO] [stdout]    --> src/lib.rs:208:7
[INFO] [stdout]     |
[INFO] [stdout] 208 |   let re_ml1 = Regex::new(r#"^"(?P<key>[^"=]+)"="(?P<val>[^"=]*)"$"#).unwrap();
[INFO] [stdout]     |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_re_ml1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `root_uuid` is never read
[INFO] [stdout]    --> src/snapshot.rs:200:11
[INFO] [stdout]     |
[INFO] [stdout] 200 |   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:201:11
[INFO] [stdout]     |
[INFO] [stdout] 201 |   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: unused variable: `re_ml1`
[INFO] [stdout]    --> src/lib.rs:207:7
[INFO] [stdout]     |
[INFO] [stdout] 207 |   let re_ml1 = Regex::new(r#"^(?P<key>[^"=]+)="(?P<val>[^"=]*)"$"#).unwrap();
[INFO] [stdout]     |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_re_ml1`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `re_ml1`
[INFO] [stdout]    --> src/lib.rs:208:7
[INFO] [stdout]     |
[INFO] [stdout] 208 |   let re_ml1 = Regex::new(r#"^"(?P<key>[^"=]+)"="(?P<val>[^"=]*)"$"#).unwrap();
[INFO] [stdout]     |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_re_ml1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `root_uuid` is never read
[INFO] [stdout]    --> src/snapshot.rs:200:11
[INFO] [stdout]     |
[INFO] [stdout] 200 |   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:201:11
[INFO] [stdout]     |
[INFO] [stdout] 201 |   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: 5 warnings emitted
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.51s
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a4a8b57ea6db79a15b052724956be94342dff316ea73ac9b0cabbd54aa503093", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4a8b57ea6db79a15b052724956be94342dff316ea73ac9b0cabbd54aa503093", kill_on_drop: false }`
[INFO] [stdout] a4a8b57ea6db79a15b052724956be94342dff316ea73ac9b0cabbd54aa503093