[INFO] cloning repository https://github.com/ALWYNWU/Lab2_Q4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ALWYNWU/Lab2_Q4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FALWYNWU%2FLab2_Q4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FALWYNWU%2FLab2_Q4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ca0c7b1fd626c195dbd22a1c34a081cd3eda14f3
[INFO] checking ALWYNWU/Lab2_Q4 against master#0dce3f606e05cffab7361c132a399d3550ab0df8 for pr-78376
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FALWYNWU%2FLab2_Q4" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ALWYNWU/Lab2_Q4 on toolchain 0dce3f606e05cffab7361c132a399d3550ab0df8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ALWYNWU/Lab2_Q4
[INFO] finished tweaking git repo https://github.com/ALWYNWU/Lab2_Q4
[INFO] tweaked toml for git repo https://github.com/ALWYNWU/Lab2_Q4 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ALWYNWU/Lab2_Q4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7db512f83819cb447ff45c28c547d9d8d47a252cd2cd8fad4056f649922a1aa8
[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" "7db512f83819cb447ff45c28c547d9d8d47a252cd2cd8fad4056f649922a1aa8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7db512f83819cb447ff45c28c547d9d8d47a252cd2cd8fad4056f649922a1aa8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7db512f83819cb447ff45c28c547d9d8d47a252cd2cd8fad4056f649922a1aa8", kill_on_drop: false }`
[INFO] [stdout] 7db512f83819cb447ff45c28c547d9d8d47a252cd2cd8fad4056f649922a1aa8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 07faf93d577bb99d0804e1488e37080f520a9fc8643aa25f6bc16ea0e54d17cf
[INFO] running `Command { std: "docker" "start" "-a" "07faf93d577bb99d0804e1488e37080f520a9fc8643aa25f6bc16ea0e54d17cf", kill_on_drop: false }`
[INFO] [stderr]     Checking Lab2_Q4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]   --> src/main.rs:17:22
[INFO] [stdout]    |
[INFO] [stdout] 17 |     return box match (*Binary_tree) {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `Lab2_Q4` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `lab2_q4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Binary_tree` should have a snake case name
[INFO] [stdout]   --> src/main.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn insert<T: Ord>(Binary_tree:Box<Tree<T>>, value: T) -> Box<Tree<T>> {
[INFO] [stdout]    |                   ^^^^^^^^^^^ help: convert the identifier to snake case: `binary_tree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `BinaryT` should have a snake case name
[INFO] [stdout]   --> src/main.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut BinaryT = box Node {data: 2, left_child: box Empty, right_child: box Empty};
[INFO] [stdout]    |             ^^^^^^^ help: convert the identifier to snake case: `binary_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]   --> src/main.rs:17:22
[INFO] [stdout]    |
[INFO] [stdout] 17 |     return box match (*Binary_tree) {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `Lab2_Q4` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `lab2_q4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Binary_tree` should have a snake case name
[INFO] [stdout]   --> src/main.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn insert<T: Ord>(Binary_tree:Box<Tree<T>>, value: T) -> Box<Tree<T>> {
[INFO] [stdout]    |                   ^^^^^^^^^^^ help: convert the identifier to snake case: `binary_tree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `BinaryT` should have a snake case name
[INFO] [stdout]   --> src/main.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut BinaryT = box Node {data: 2, left_child: box Empty, right_child: box Empty};
[INFO] [stdout]    |             ^^^^^^^ help: convert the identifier to snake case: `binary_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "07faf93d577bb99d0804e1488e37080f520a9fc8643aa25f6bc16ea0e54d17cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07faf93d577bb99d0804e1488e37080f520a9fc8643aa25f6bc16ea0e54d17cf", kill_on_drop: false }`
[INFO] [stdout] 07faf93d577bb99d0804e1488e37080f520a9fc8643aa25f6bc16ea0e54d17cf