[INFO] fetching crate binary_tree_zy 0.1.2...
[INFO] checking binary_tree_zy-0.1.2 against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789
[INFO] extracting crate binary_tree_zy 0.1.2 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate binary_tree_zy 0.1.2 on toolchain 7b3565da729099dbe807466fcd118fb2815986e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate binary_tree_zy 0.1.2
[INFO] finished tweaking crates.io crate binary_tree_zy 0.1.2
[INFO] tweaked toml for crates.io crate binary_tree_zy 0.1.2 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 186925b966821d8ff8925668403f62807f47d857c128e479fb339a35627dcd73
[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" "186925b966821d8ff8925668403f62807f47d857c128e479fb339a35627dcd73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "186925b966821d8ff8925668403f62807f47d857c128e479fb339a35627dcd73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "186925b966821d8ff8925668403f62807f47d857c128e479fb339a35627dcd73", kill_on_drop: false }`
[INFO] [stdout] 186925b966821d8ff8925668403f62807f47d857c128e479fb339a35627dcd73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+7b3565da729099dbe807466fcd118fb2815986e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6c3e19e7fa45f574624a6508109184b5c10d8370e413c2e292efc9baec517c6f
[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" "6c3e19e7fa45f574624a6508109184b5c10d8370e413c2e292efc9baec517c6f", kill_on_drop: false }`
[INFO] [stderr]     Checking binary_tree_zy v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:65:13
[INFO] [stdout]    |
[INFO] [stdout] 65 |         for i in 10..space{
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:65:13
[INFO] [stdout]    |
[INFO] [stdout] 65 |         for i in 10..space{
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print2DUtil` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn print2DUtil(&self, mut space: i64){
[INFO] [stdout]    |            ^^^^^^^^^^^ help: convert the identifier to snake case: `print2_dutil`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_print2DUtil` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:99:8
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn test_print2DUtil(){
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_print2_dutil`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print2DUtil` should have a snake case name
[INFO] [stdout]   --> src/lib.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn print2DUtil(&self, mut space: i64){
[INFO] [stdout]    |            ^^^^^^^^^^^ help: convert the identifier to snake case: `print2_dutil`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "6c3e19e7fa45f574624a6508109184b5c10d8370e413c2e292efc9baec517c6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c3e19e7fa45f574624a6508109184b5c10d8370e413c2e292efc9baec517c6f", kill_on_drop: false }`
[INFO] [stdout] 6c3e19e7fa45f574624a6508109184b5c10d8370e413c2e292efc9baec517c6f