[INFO] cloning repository https://github.com/boyi99/RustCase
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/boyi99/RustCase" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboyi99%2FRustCase", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboyi99%2FRustCase'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 77ec957a1822dc8420936f9c82f29d455879d4dc
[INFO] checking boyi99/RustCase against try#66388cc165a6c4ac98c074dc9f0281ff23528c55 for pr-150727
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboyi99%2FRustCase" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/boyi99/RustCase
[INFO] finished tweaking git repo https://github.com/boyi99/RustCase
[INFO] tweaked toml for git repo https://github.com/boyi99/RustCase written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/boyi99/RustCase on toolchain 66388cc165a6c4ac98c074dc9f0281ff23528c55
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+66388cc165a6c4ac98c074dc9f0281ff23528c55" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/boyi99/RustCase 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" "+66388cc165a6c4ac98c074dc9f0281ff23528c55" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+66388cc165a6c4ac98c074dc9f0281ff23528c55" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa4280d23a7a0dc49c5903e375656a20fef83b6f6f3759929a1d9bb7e15e0938
[INFO] running `Command { std: "docker" "start" "-a" "fa4280d23a7a0dc49c5903e375656a20fef83b6f6f3759929a1d9bb7e15e0938", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa4280d23a7a0dc49c5903e375656a20fef83b6f6f3759929a1d9bb7e15e0938", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa4280d23a7a0dc49c5903e375656a20fef83b6f6f3759929a1d9bb7e15e0938", kill_on_drop: false }`
[INFO] [stdout] fa4280d23a7a0dc49c5903e375656a20fef83b6f6f3759929a1d9bb7e15e0938
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+66388cc165a6c4ac98c074dc9f0281ff23528c55" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3e3968cd1ae4d2820c2c55aba4345684d4f065320b73a4f4388d33a8f85c10e
[INFO] running `Command { std: "docker" "start" "-a" "b3e3968cd1ae4d2820c2c55aba4345684d4f065320b73a4f4388d33a8f85c10e", kill_on_drop: false }`
[INFO] [stderr]     Checking json_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]   --> src/sort_utils.rs:55:24
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn insert_sort(arr: &mut [i32]) {
[INFO] [stdout]    |                        ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]   --> src/sort_utils.rs:55:24
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn insert_sort(arr: &mut [i32]) {
[INFO] [stdout]    |                        ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]   --> src/sort_utils.rs:66:23
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn merge_sort(arr: &mut [i32]) {
[INFO] [stdout]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]   --> src/sort_utils.rs:66:23
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn merge_sort(arr: &mut [i32]) {
[INFO] [stdout]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]   --> src/sort_utils.rs:76:23
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn quick_sort(arr: &mut [i32]) {
[INFO] [stdout]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]   --> src/sort_utils.rs:76:23
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn quick_sort(arr: &mut [i32]) {
[INFO] [stdout]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]   --> src/sort_utils.rs:86:22
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn heap_sort(arr: &mut [i32]) {
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]   --> src/sort_utils.rs:86:22
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn heap_sort(arr: &mut [i32]) {
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]   --> src/sort_utils.rs:96:26
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn counting_sort(arr: &mut [i32]) {
[INFO] [stdout]    |                          ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]    --> src/sort_utils.rs:107:23
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn radix_sort(arr: &mut [i32]) {
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]   --> src/sort_utils.rs:96:26
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn counting_sort(arr: &mut [i32]) {
[INFO] [stdout]    |                          ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]    --> src/sort_utils.rs:118:24
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn bucket_sort(arr: &mut [i32]) {
[INFO] [stdout]     |                        ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]    --> src/sort_utils.rs:107:23
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn radix_sort(arr: &mut [i32]) {
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]    --> src/sort_utils.rs:118:24
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn bucket_sort(arr: &mut [i32]) {
[INFO] [stdout]     |                        ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bubble_sort` is never used
[INFO] [stdout]  --> src/sort_utils.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn bubble_sort(arr: &mut [i32]) {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `insert_sort` is never used
[INFO] [stdout]   --> src/sort_utils.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn insert_sort(arr: &mut [i32]) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bubble_sort` is never used
[INFO] [stdout]  --> src/sort_utils.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn bubble_sort(arr: &mut [i32]) {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `merge_sort` is never used
[INFO] [stdout]   --> src/sort_utils.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn merge_sort(arr: &mut [i32]) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `quick_sort` is never used
[INFO] [stdout]   --> src/sort_utils.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn quick_sort(arr: &mut [i32]) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `heap_sort` is never used
[INFO] [stdout]   --> src/sort_utils.rs:86:12
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn heap_sort(arr: &mut [i32]) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `counting_sort` is never used
[INFO] [stdout]   --> src/sort_utils.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn counting_sort(arr: &mut [i32]) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `radix_sort` is never used
[INFO] [stdout]    --> src/sort_utils.rs:107:12
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn radix_sort(arr: &mut [i32]) {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bucket_sort` is never used
[INFO] [stdout]    --> src/sort_utils.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn bucket_sort(arr: &mut [i32]) {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `insert_sort` is never used
[INFO] [stdout]   --> src/sort_utils.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn insert_sort(arr: &mut [i32]) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `merge_sort` is never used
[INFO] [stdout]   --> src/sort_utils.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn merge_sort(arr: &mut [i32]) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `quick_sort` is never used
[INFO] [stdout]   --> src/sort_utils.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn quick_sort(arr: &mut [i32]) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `heap_sort` is never used
[INFO] [stdout]   --> src/sort_utils.rs:86:12
[INFO] [stdout]    |
[INFO] [stdout] 86 |     pub fn heap_sort(arr: &mut [i32]) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `counting_sort` is never used
[INFO] [stdout]   --> src/sort_utils.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn counting_sort(arr: &mut [i32]) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `radix_sort` is never used
[INFO] [stdout]    --> src/sort_utils.rs:107:12
[INFO] [stdout]     |
[INFO] [stdout] 107 |     pub fn radix_sort(arr: &mut [i32]) {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bucket_sort` is never used
[INFO] [stdout]    --> src/sort_utils.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn bucket_sort(arr: &mut [i32]) {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "b3e3968cd1ae4d2820c2c55aba4345684d4f065320b73a4f4388d33a8f85c10e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3e3968cd1ae4d2820c2c55aba4345684d4f065320b73a4f4388d33a8f85c10e", kill_on_drop: false }`
[INFO] [stdout] b3e3968cd1ae4d2820c2c55aba4345684d4f065320b73a4f4388d33a8f85c10e