[INFO] fetching crate bagofholding 0.1.0...
[INFO] checking bagofholding-0.1.0 against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] extracting crate bagofholding 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate bagofholding 0.1.0 on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bagofholding 0.1.0
[INFO] finished tweaking crates.io crate bagofholding 0.1.0
[INFO] tweaked toml for crates.io crate bagofholding 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", 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] ac255de05587e81f9a111fa744ae9f74ad049cc4c2e47b7c5353b90e77a3b1f8
[INFO] running `Command { std: "docker" "start" "-a" "ac255de05587e81f9a111fa744ae9f74ad049cc4c2e47b7c5353b90e77a3b1f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac255de05587e81f9a111fa744ae9f74ad049cc4c2e47b7c5353b90e77a3b1f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac255de05587e81f9a111fa744ae9f74ad049cc4c2e47b7c5353b90e77a3b1f8", kill_on_drop: false }`
[INFO] [stdout] ac255de05587e81f9a111fa744ae9f74ad049cc4c2e47b7c5353b90e77a3b1f8
[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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2509ee1d2cd10b45cd15ebbac29ea5f85d89286b901ec36fabeb427934ec65aa
[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" "2509ee1d2cd10b45cd15ebbac29ea5f85d89286b901ec36fabeb427934ec65aa", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking bagofholding v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/bst/tree_node.rs:165:30
[INFO] [stdout]     |
[INFO] [stdout] 165 |             Self::Internal { data, left, right } => {
[INFO] [stdout]     |                              ^^^^ help: try ignoring the field: `data: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `increment_use`
[INFO] [stdout]   --> src/bst/node_data.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn increment_use(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/bst/tree_node.rs:165:30
[INFO] [stdout]     |
[INFO] [stdout] 165 |             Self::Internal { data, left, right } => {
[INFO] [stdout]     |                              ^^^^ help: try ignoring the field: `data: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `increment_use`
[INFO] [stdout]   --> src/bst/node_data.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn increment_use(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "2509ee1d2cd10b45cd15ebbac29ea5f85d89286b901ec36fabeb427934ec65aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2509ee1d2cd10b45cd15ebbac29ea5f85d89286b901ec36fabeb427934ec65aa", kill_on_drop: false }`
[INFO] [stdout] 2509ee1d2cd10b45cd15ebbac29ea5f85d89286b901ec36fabeb427934ec65aa