[INFO] cloning repository https://github.com/jiko21/binary-sampling-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jiko21/binary-sampling-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiko21%2Fbinary-sampling-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiko21%2Fbinary-sampling-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f1d4d514a79ab5f7c73de99e5e6ceb20d3185e2e
[INFO] checking jiko21/binary-sampling-rust against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiko21%2Fbinary-sampling-rust" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jiko21/binary-sampling-rust on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jiko21/binary-sampling-rust
[INFO] finished tweaking git repo https://github.com/jiko21/binary-sampling-rust
[INFO] tweaked toml for git repo https://github.com/jiko21/binary-sampling-rust written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/jiko21/binary-sampling-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0ebff63d2c327c74e14eda700e98ed6a18fbf925969693715cf879444348c3a5
[INFO] running `Command { std: "docker" "start" "-a" "0ebff63d2c327c74e14eda700e98ed6a18fbf925969693715cf879444348c3a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ebff63d2c327c74e14eda700e98ed6a18fbf925969693715cf879444348c3a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ebff63d2c327c74e14eda700e98ed6a18fbf925969693715cf879444348c3a5", kill_on_drop: false }`
[INFO] [stdout] 0ebff63d2c327c74e14eda700e98ed6a18fbf925969693715cf879444348c3a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 438a7eb48b00cb1298efcaa2ce369b15f63c297201b720a5c91c6181066b635d
[INFO] running `Command { std: "docker" "start" "-a" "438a7eb48b00cb1298efcaa2ce369b15f63c297201b720a5c91c6181066b635d", kill_on_drop: false }`
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking binary-sampling v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/main.rs:58:32
[INFO] [stdout]    |
[INFO] [stdout] 58 |       BinaryTree::Node{weight, val, ref left, ref right, .. } => {
[INFO] [stdout]    |                                ^^^ help: try ignoring the field: `val: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:119:7
[INFO] [stdout]     |
[INFO] [stdout] 119 |   for i in 0..10000000 {
[INFO] [stdout]     |       ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |     let mut target = &root;
[INFO] [stdout]     |         ----^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/main.rs:58:32
[INFO] [stdout]    |
[INFO] [stdout] 58 |       BinaryTree::Node{weight, val, ref left, ref right, .. } => {
[INFO] [stdout]    |                                ^^^ help: try ignoring the field: `val: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:119:7
[INFO] [stdout]     |
[INFO] [stdout] 119 |   for i in 0..10000000 {
[INFO] [stdout]     |       ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |     let mut target = &root;
[INFO] [stdout]     |         ----^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.23s
[INFO] running `Command { std: "docker" "inspect" "438a7eb48b00cb1298efcaa2ce369b15f63c297201b720a5c91c6181066b635d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "438a7eb48b00cb1298efcaa2ce369b15f63c297201b720a5c91c6181066b635d", kill_on_drop: false }`
[INFO] [stdout] 438a7eb48b00cb1298efcaa2ce369b15f63c297201b720a5c91c6181066b635d