[INFO] cloning repository https://github.com/mekas/BinaryTreeRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mekas/BinaryTreeRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmekas%2FBinaryTreeRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmekas%2FBinaryTreeRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f7813d46245689e33f3ef0a38651c5faecef8a11
[INFO] testing mekas/BinaryTreeRust against try#2440211fe03bc45c89b6dc1a3df18382ce91e32b for pr-146098-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmekas%2FBinaryTreeRust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mekas/BinaryTreeRust
[INFO] finished tweaking git repo https://github.com/mekas/BinaryTreeRust
[INFO] tweaked toml for git repo https://github.com/mekas/BinaryTreeRust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mekas/BinaryTreeRust on toolchain 2440211fe03bc45c89b6dc1a3df18382ce91e32b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mekas/BinaryTreeRust 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" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9e51947c8ff5bc47d46e73be50db375b196e3a23c3702783159d6f7341fd2388
[INFO] running `Command { std: "docker" "start" "-a" "9e51947c8ff5bc47d46e73be50db375b196e3a23c3702783159d6f7341fd2388", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e51947c8ff5bc47d46e73be50db375b196e3a23c3702783159d6f7341fd2388", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e51947c8ff5bc47d46e73be50db375b196e3a23c3702783159d6f7341fd2388", kill_on_drop: false }`
[INFO] [stdout] 9e51947c8ff5bc47d46e73be50db375b196e3a23c3702783159d6f7341fd2388
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97fef62a07315d0cc33b3b86003267bc7887841220ce458e757683fdf9b29ecd
[INFO] running `Command { std: "docker" "start" "-a" "97fef62a07315d0cc33b3b86003267bc7887841220ce458e757683fdf9b29ecd", kill_on_drop: false }`
[INFO] [stderr]    Compiling binarysearchtree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/structure/bst.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `node_alter` is never read
[INFO] [stdout]   --> src/structure/bst.rs:89:17
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let mut node_alter: BstNodeLink = BstNode::new_bst_nodelink(0);
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_index` is never used
[INFO] [stdout]    --> src/main.rs:130:4
[INFO] [stdout]     |
[INFO] [stdout] 130 | fn test_index(){
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `tree_successor` is never used
[INFO] [stdout]    --> src/structure/bst.rs:189:12
[INFO] [stdout]     |
[INFO] [stdout]  16 | impl BstNode {
[INFO] [stdout]     | ------------ associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 189 |     pub fn tree_successor(x_node: &BstNodeLink) -> Option<BstNodeLink> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "97fef62a07315d0cc33b3b86003267bc7887841220ce458e757683fdf9b29ecd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97fef62a07315d0cc33b3b86003267bc7887841220ce458e757683fdf9b29ecd", kill_on_drop: false }`
[INFO] [stdout] 97fef62a07315d0cc33b3b86003267bc7887841220ce458e757683fdf9b29ecd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d1934eb51a5fc7b68904478bf66c132e4493fdd90072cee07f93eb8d5551f8f
[INFO] running `Command { std: "docker" "start" "-a" "9d1934eb51a5fc7b68904478bf66c132e4493fdd90072cee07f93eb8d5551f8f", kill_on_drop: false }`
[INFO] [stderr]    Compiling binarysearchtree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/structure/bst.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `node_alter` is never read
[INFO] [stdout]   --> src/structure/bst.rs:89:17
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let mut node_alter: BstNodeLink = BstNode::new_bst_nodelink(0);
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_index` is never used
[INFO] [stdout]    --> src/main.rs:130:4
[INFO] [stdout]     |
[INFO] [stdout] 130 | fn test_index(){
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `tree_successor` is never used
[INFO] [stdout]    --> src/structure/bst.rs:189:12
[INFO] [stdout]     |
[INFO] [stdout]  16 | impl BstNode {
[INFO] [stdout]     | ------------ associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 189 |     pub fn tree_successor(x_node: &BstNodeLink) -> Option<BstNodeLink> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "9d1934eb51a5fc7b68904478bf66c132e4493fdd90072cee07f93eb8d5551f8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d1934eb51a5fc7b68904478bf66c132e4493fdd90072cee07f93eb8d5551f8f", kill_on_drop: false }`
[INFO] [stdout] 9d1934eb51a5fc7b68904478bf66c132e4493fdd90072cee07f93eb8d5551f8f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5d70cb36b10a2acaa424715fefbc43af9638818b3bf9b09a8454e965132fb8a8
[INFO] running `Command { std: "docker" "start" "-a" "5d70cb36b10a2acaa424715fefbc43af9638818b3bf9b09a8454e965132fb8a8", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `Ref`
[INFO] [stderr]  --> src/structure/bst.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cell::{Ref, RefCell};
[INFO] [stderr]   |                 ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `node_alter` is never read
[INFO] [stderr]   --> src/structure/bst.rs:89:17
[INFO] [stderr]    |
[INFO] [stderr] 89 |         let mut node_alter: BstNodeLink = BstNode::new_bst_nodelink(0);
[INFO] [stderr]    |                 ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_index` is never used
[INFO] [stderr]    --> src/main.rs:130:4
[INFO] [stderr]     |
[INFO] [stderr] 130 | fn test_index(){
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `tree_successor` is never used
[INFO] [stderr]    --> src/structure/bst.rs:189:12
[INFO] [stderr]     |
[INFO] [stderr]  16 | impl BstNode {
[INFO] [stderr]     | ------------ associated function in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 189 |     pub fn tree_successor(x_node: &BstNodeLink) -> Option<BstNodeLink> {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `binarysearchtree` (bin "binarysearchtree" test) generated 4 warnings (run `cargo fix --bin "binarysearchtree" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/binarysearchtree-b735fc46d7110746)
[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" "5d70cb36b10a2acaa424715fefbc43af9638818b3bf9b09a8454e965132fb8a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d70cb36b10a2acaa424715fefbc43af9638818b3bf9b09a8454e965132fb8a8", kill_on_drop: false }`
[INFO] [stdout] 5d70cb36b10a2acaa424715fefbc43af9638818b3bf9b09a8454e965132fb8a8