[INFO] cloning repository https://github.com/jiangzh1206/rust_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jiangzh1206/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiangzh1206%2Frust_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiangzh1206%2Frust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 39128e6a457e26435ae3c2e07b538ccdf6f52abb
[INFO] checking jiangzh1206/rust_learning against try#15a786332e2f0dd343b226ab6bb8ec028a350f73 for pr-81782
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiangzh1206%2Frust_learning" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jiangzh1206/rust_learning on toolchain 15a786332e2f0dd343b226ab6bb8ec028a350f73
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jiangzh1206/rust_learning
[INFO] finished tweaking git repo https://github.com/jiangzh1206/rust_learning
[INFO] tweaked toml for git repo https://github.com/jiangzh1206/rust_learning written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/jiangzh1206/rust_learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--no-deps" "--format-version=1", 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] fcb9d25ff2732db06b613cfb766647ad9bc3842abda121d89f37542d34b98a83
[INFO] running `Command { std: "docker" "start" "-a" "fcb9d25ff2732db06b613cfb766647ad9bc3842abda121d89f37542d34b98a83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fcb9d25ff2732db06b613cfb766647ad9bc3842abda121d89f37542d34b98a83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcb9d25ff2732db06b613cfb766647ad9bc3842abda121d89f37542d34b98a83", kill_on_drop: false }`
[INFO] [stdout] fcb9d25ff2732db06b613cfb766647ad9bc3842abda121d89f37542d34b98a83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "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] 99b5df7f2352b5479498589f3de841e468df8b33fe0ee8fb7ad1a449125e5aaf
[INFO] running `Command { std: "docker" "start" "-a" "99b5df7f2352b5479498589f3de841e468df8b33fe0ee8fb7ad1a449125e5aaf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking rand_core v0.6.1
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking data_struct v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `shell_sort`
[INFO] [stdout]  --> src/sort/shell.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn shell_sort(arr: &mut [i32]) {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_oddnums`
[INFO] [stdout]   --> src/utils.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn print_oddnums(arr: &[i32])->(i32,i32){
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `shell_sort`
[INFO] [stdout]  --> src/sort/shell.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn shell_sort(arr: &mut [i32]) {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_oddnums`
[INFO] [stdout]   --> src/utils.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn print_oddnums(arr: &[i32])->(i32,i32){
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.41s
[INFO] running `Command { std: "docker" "inspect" "99b5df7f2352b5479498589f3de841e468df8b33fe0ee8fb7ad1a449125e5aaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99b5df7f2352b5479498589f3de841e468df8b33fe0ee8fb7ad1a449125e5aaf", kill_on_drop: false }`
[INFO] [stdout] 99b5df7f2352b5479498589f3de841e468df8b33fe0ee8fb7ad1a449125e5aaf