[INFO] fetching crate keratin 0.1.1...
[INFO] checking keratin-0.1.1 against beta for pr-78714
[INFO] extracting crate keratin 0.1.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate keratin 0.1.1 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 keratin 0.1.1
[INFO] finished tweaking crates.io crate keratin 0.1.1
[INFO] tweaked toml for crates.io crate keratin 0.1.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] d4395170932bdb5b44a3a733c818fd265b61670cdc03496745c0761f13704432
[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" "d4395170932bdb5b44a3a733c818fd265b61670cdc03496745c0761f13704432", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4395170932bdb5b44a3a733c818fd265b61670cdc03496745c0761f13704432", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4395170932bdb5b44a3a733c818fd265b61670cdc03496745c0761f13704432", kill_on_drop: false }`
[INFO] [stdout] d4395170932bdb5b44a3a733c818fd265b61670cdc03496745c0761f13704432
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0f4e6fb2ef7dd4e0e0b4e69a43fd85b63c687abcf627f2e30b341436a0c85a7a
[INFO] running `Command { std: "docker" "start" "-a" "0f4e6fb2ef7dd4e0e0b4e69a43fd85b63c687abcf627f2e30b341436a0c85a7a", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]     Checking bson v0.14.1
[INFO] [stderr]     Checking keratin v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `query`
[INFO] [stdout]    --> src/lib.rs:105:19
[INFO] [stdout]     |
[INFO] [stdout] 105 |     pub fn modify(query: &str) {}
[INFO] [stdout]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_query`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `truncate`
[INFO] [stdout]    --> src/lib.rs:120:16
[INFO] [stdout]     |
[INFO] [stdout] 120 |     pub fn new(truncate: bool) -> Collection {
[INFO] [stdout]     |                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_truncate`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `query`
[INFO] [stdout]    --> src/lib.rs:105:19
[INFO] [stdout]     |
[INFO] [stdout] 105 |     pub fn modify(query: &str) {}
[INFO] [stdout]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_query`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `truncate`
[INFO] [stdout]    --> src/lib.rs:120:16
[INFO] [stdout]     |
[INFO] [stdout] 120 |     pub fn new(truncate: bool) -> Collection {
[INFO] [stdout]     |                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_truncate`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `keratin::errors::Errors`
[INFO] [stdout]  --> tests/core.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use keratin::errors::Errors;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` 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 4.33s
[INFO] running `Command { std: "docker" "inspect" "0f4e6fb2ef7dd4e0e0b4e69a43fd85b63c687abcf627f2e30b341436a0c85a7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f4e6fb2ef7dd4e0e0b4e69a43fd85b63c687abcf627f2e30b341436a0c85a7a", kill_on_drop: false }`
[INFO] [stdout] 0f4e6fb2ef7dd4e0e0b4e69a43fd85b63c687abcf627f2e30b341436a0c85a7a