[INFO] cloning repository https://github.com/firatege/rust-bst
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/firatege/rust-bst" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffiratege%2Frust-bst", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffiratege%2Frust-bst'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d3eb5ba3225e1a6b405d7e09d94a3a1026651dd6
[INFO] testing firatege/rust-bst against master#b03b3a7ec92682be2917540b679478d41c95a30c for pr-137122-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffiratege%2Frust-bst" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/firatege/rust-bst
[INFO] finished tweaking git repo https://github.com/firatege/rust-bst
[INFO] tweaked toml for git repo https://github.com/firatege/rust-bst written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/firatege/rust-bst on toolchain b03b3a7ec92682be2917540b679478d41c95a30c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b03b3a7ec92682be2917540b679478d41c95a30c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/firatege/rust-bst already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b03b3a7ec92682be2917540b679478d41c95a30c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+b03b3a7ec92682be2917540b679478d41c95a30c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2ea6e773d0beb74def0a8450d21ae0cf7501d13146e7fea41ca03a89ce244db8
[INFO] running `Command { std: "docker" "start" "-a" "2ea6e773d0beb74def0a8450d21ae0cf7501d13146e7fea41ca03a89ce244db8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ea6e773d0beb74def0a8450d21ae0cf7501d13146e7fea41ca03a89ce244db8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ea6e773d0beb74def0a8450d21ae0cf7501d13146e7fea41ca03a89ce244db8", kill_on_drop: false }`
[INFO] [stdout] 2ea6e773d0beb74def0a8450d21ae0cf7501d13146e7fea41ca03a89ce244db8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+b03b3a7ec92682be2917540b679478d41c95a30c" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 261869dcc4f9a818221ff956ba6e77db77c6207630fc075a4dc83882f22f05eb
[INFO] running `Command { std: "docker" "start" "-a" "261869dcc4f9a818221ff956ba6e77db77c6207630fc075a4dc83882f22f05eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling bst v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]   --> src/main.rs:39:18
[INFO] [stdout]    |
[INFO] [stdout] 39 |             Some(root) => false
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left`
[INFO] [stdout]    --> src/main.rs:157:36
[INFO] [stdout]     |
[INFO] [stdout] 157 |             while let Some(ref mut left) = min.left_node {
[INFO] [stdout]     |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_left`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "261869dcc4f9a818221ff956ba6e77db77c6207630fc075a4dc83882f22f05eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "261869dcc4f9a818221ff956ba6e77db77c6207630fc075a4dc83882f22f05eb", kill_on_drop: false }`
[INFO] [stdout] 261869dcc4f9a818221ff956ba6e77db77c6207630fc075a4dc83882f22f05eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+b03b3a7ec92682be2917540b679478d41c95a30c" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7173bbbfbfb601bfd5224b5d7371694843ccdd2247a96c94178ebce8f9d09a46
[INFO] running `Command { std: "docker" "start" "-a" "7173bbbfbfb601bfd5224b5d7371694843ccdd2247a96c94178ebce8f9d09a46", kill_on_drop: false }`
[INFO] [stderr]    Compiling bst v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]   --> src/main.rs:39:18
[INFO] [stdout]    |
[INFO] [stdout] 39 |             Some(root) => false
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left`
[INFO] [stdout]    --> src/main.rs:157:36
[INFO] [stdout]     |
[INFO] [stdout] 157 |             while let Some(ref mut left) = min.left_node {
[INFO] [stdout]     |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_left`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "7173bbbfbfb601bfd5224b5d7371694843ccdd2247a96c94178ebce8f9d09a46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7173bbbfbfb601bfd5224b5d7371694843ccdd2247a96c94178ebce8f9d09a46", kill_on_drop: false }`
[INFO] [stdout] 7173bbbfbfb601bfd5224b5d7371694843ccdd2247a96c94178ebce8f9d09a46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+b03b3a7ec92682be2917540b679478d41c95a30c" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5dddb0ee3d1c2ffb1466540b23a3e2ce65d8994e151ff689b008b5e591c08b47
[INFO] running `Command { std: "docker" "start" "-a" "5dddb0ee3d1c2ffb1466540b23a3e2ce65d8994e151ff689b008b5e591c08b47", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `root`
[INFO] [stderr]   --> src/main.rs:39:18
[INFO] [stderr]    |
[INFO] [stderr] 39 |             Some(root) => false
[INFO] [stderr]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left`
[INFO] [stderr]    --> src/main.rs:157:36
[INFO] [stderr]     |
[INFO] [stderr] 157 |             while let Some(ref mut left) = min.left_node {
[INFO] [stderr]     |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_left`
[INFO] [stderr] 
[INFO] [stderr] warning: `bst` (bin "bst" test) generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/bst-1ae77c31d7ed95de)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5dddb0ee3d1c2ffb1466540b23a3e2ce65d8994e151ff689b008b5e591c08b47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dddb0ee3d1c2ffb1466540b23a3e2ce65d8994e151ff689b008b5e591c08b47", kill_on_drop: false }`
[INFO] [stdout] 5dddb0ee3d1c2ffb1466540b23a3e2ce65d8994e151ff689b008b5e591c08b47