[INFO] fetching crate generational-indextree 1.1.2...
[INFO] checking generational-indextree-1.1.2 against master#f5f33ec0e0455eefa72fc5567eb1280a4d5ee206 for pr-83312
[INFO] extracting crate generational-indextree 1.1.2 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate generational-indextree 1.1.2 on toolchain f5f33ec0e0455eefa72fc5567eb1280a4d5ee206
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate generational-indextree 1.1.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate generational-indextree 1.1.2
[INFO] tweaked toml for crates.io crate generational-indextree 1.1.2 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate generational-indextree 1.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "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-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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 01bf91e1654d5cb7c71d692dfa21ad7329cc1ed9355fe8aedebc5ebdab99fcf6
[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" "01bf91e1654d5cb7c71d692dfa21ad7329cc1ed9355fe8aedebc5ebdab99fcf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01bf91e1654d5cb7c71d692dfa21ad7329cc1ed9355fe8aedebc5ebdab99fcf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01bf91e1654d5cb7c71d692dfa21ad7329cc1ed9355fe8aedebc5ebdab99fcf6", kill_on_drop: false }`
[INFO] [stdout] 01bf91e1654d5cb7c71d692dfa21ad7329cc1ed9355fe8aedebc5ebdab99fcf6
[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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 00100f9493fb91edcf6734ad3c57b1fc09ac2bb9ed1e47da89d38a6aeb24ef3f
[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" "00100f9493fb91edcf6734ad3c57b1fc09ac2bb9ed1e47da89d38a6aeb24ef3f", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking generational-arena v0.2.8
[INFO] [stderr]     Checking generational-indextree v1.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `n1_id`
[INFO] [stdout]    --> src/arena.rs:279:9
[INFO] [stdout]     |
[INFO] [stdout] 279 |     let n1_id = arena.new_node("1");
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_n1_id`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n2_id`
[INFO] [stdout]    --> src/arena.rs:280:9
[INFO] [stdout]     |
[INFO] [stdout] 280 |     let n2_id = arena.new_node("2");
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_n2_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n3_id`
[INFO] [stdout]    --> src/arena.rs:281:9
[INFO] [stdout]     |
[INFO] [stdout] 281 |     let n3_id = arena.new_node("3");
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_n3_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> tests/lib.rs:14:6
[INFO] [stdout]    |
[INFO] [stdout] 14 |     };
[INFO] [stdout]    |      ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` 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 0.73s
[INFO] running `Command { std: "docker" "inspect" "00100f9493fb91edcf6734ad3c57b1fc09ac2bb9ed1e47da89d38a6aeb24ef3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00100f9493fb91edcf6734ad3c57b1fc09ac2bb9ed1e47da89d38a6aeb24ef3f", kill_on_drop: false }`
[INFO] [stdout] 00100f9493fb91edcf6734ad3c57b1fc09ac2bb9ed1e47da89d38a6aeb24ef3f