[INFO] cloning repository https://github.com/tada3/binary-tree-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tada3/binary-tree-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftada3%2Fbinary-tree-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftada3%2Fbinary-tree-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a10a550dee688662d35104da8ff6d7f3c55a9d31
[INFO] testing tada3/binary-tree-rust against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftada3%2Fbinary-tree-rust" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tada3/binary-tree-rust on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tada3/binary-tree-rust
[INFO] finished tweaking git repo https://github.com/tada3/binary-tree-rust
[INFO] tweaked toml for git repo https://github.com/tada3/binary-tree-rust written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/tada3/binary-tree-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea58d3e7e8cf8209b417d745002065b064cc10d78b59055059b429e3e49d3cbf
[INFO] running `Command { std: "docker" "start" "-a" "ea58d3e7e8cf8209b417d745002065b064cc10d78b59055059b429e3e49d3cbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea58d3e7e8cf8209b417d745002065b064cc10d78b59055059b429e3e49d3cbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea58d3e7e8cf8209b417d745002065b064cc10d78b59055059b429e3e49d3cbf", kill_on_drop: false }`
[INFO] [stdout] ea58d3e7e8cf8209b417d745002065b064cc10d78b59055059b429e3e49d3cbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77965d19c3e2321eb84ca2c77498a78f9f8f1e9de92fd4a402c6dc1fc07e6faa
[INFO] running `Command { std: "docker" "start" "-a" "77965d19c3e2321eb84ca2c77498a78f9f8f1e9de92fd4a402c6dc1fc07e6faa", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling btree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `newNode` should have a snake case name
[INFO] [stdout]   --> src/main.rs:97:21
[INFO] [stdout]    |
[INFO] [stdout] 97 |                 let newNode = Node::new(x);
[INFO] [stdout]    |                     ^^^^^^^ help: convert the identifier to snake case: `new_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `boxedNode` should have a snake case name
[INFO] [stdout]   --> src/main.rs:98:21
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 let boxedNode = Some(Box::new(newNode));
[INFO] [stdout]    |                     ^^^^^^^^^ help: convert the identifier to snake case: `boxed_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "77965d19c3e2321eb84ca2c77498a78f9f8f1e9de92fd4a402c6dc1fc07e6faa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77965d19c3e2321eb84ca2c77498a78f9f8f1e9de92fd4a402c6dc1fc07e6faa", kill_on_drop: false }`
[INFO] [stdout] 77965d19c3e2321eb84ca2c77498a78f9f8f1e9de92fd4a402c6dc1fc07e6faa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 83a99a185114be9df2278caae24cc2afc10779e84dc7d8cdcabdd75679e1867f
[INFO] running `Command { std: "docker" "start" "-a" "83a99a185114be9df2278caae24cc2afc10779e84dc7d8cdcabdd75679e1867f", kill_on_drop: false }`
[INFO] [stderr]    Compiling btree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `newNode` should have a snake case name
[INFO] [stdout]   --> src/main.rs:97:21
[INFO] [stdout]    |
[INFO] [stdout] 97 |                 let newNode = Node::new(x);
[INFO] [stdout]    |                     ^^^^^^^ help: convert the identifier to snake case: `new_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `boxedNode` should have a snake case name
[INFO] [stdout]   --> src/main.rs:98:21
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 let boxedNode = Some(Box::new(newNode));
[INFO] [stdout]    |                     ^^^^^^^^^ help: convert the identifier to snake case: `boxed_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "83a99a185114be9df2278caae24cc2afc10779e84dc7d8cdcabdd75679e1867f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83a99a185114be9df2278caae24cc2afc10779e84dc7d8cdcabdd75679e1867f", kill_on_drop: false }`
[INFO] [stdout] 83a99a185114be9df2278caae24cc2afc10779e84dc7d8cdcabdd75679e1867f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6613f1338aa0b698423d29dbb377783659f7043461a6e4865654909c32a053a5
[INFO] running `Command { std: "docker" "start" "-a" "6613f1338aa0b698423d29dbb377783659f7043461a6e4865654909c32a053a5", kill_on_drop: false }`
[INFO] [stderr] warning: variable `newNode` should have a snake case name
[INFO] [stderr]   --> src/main.rs:97:21
[INFO] [stderr]    |
[INFO] [stderr] 97 |                 let newNode = Node::new(x);
[INFO] [stderr]    |                     ^^^^^^^ help: convert the identifier to snake case: `new_node`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `boxedNode` should have a snake case name
[INFO] [stderr]   --> src/main.rs:98:21
[INFO] [stderr]    |
[INFO] [stderr] 98 |                 let boxedNode = Some(Box::new(newNode));
[INFO] [stderr]    |                     ^^^^^^^^^ help: convert the identifier to snake case: `boxed_node`
[INFO] [stderr] 
[INFO] [stderr] warning: `btree` (bin "btree" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/btree-a7f72919950eb5ec)
[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" "6613f1338aa0b698423d29dbb377783659f7043461a6e4865654909c32a053a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6613f1338aa0b698423d29dbb377783659f7043461a6e4865654909c32a053a5", kill_on_drop: false }`
[INFO] [stdout] 6613f1338aa0b698423d29dbb377783659f7043461a6e4865654909c32a053a5