[INFO] cloning repository https://github.com/ad3ldev/rusty-sort
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ad3ldev/rusty-sort" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fad3ldev%2Frusty-sort", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fad3ldev%2Frusty-sort'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c5726234108fd411241d965797a1257bf5bb9ac7
[INFO] building ad3ldev/rusty-sort against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fad3ldev%2Frusty-sort" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ad3ldev/rusty-sort on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ad3ldev/rusty-sort
[INFO] finished tweaking git repo https://github.com/ad3ldev/rusty-sort
[INFO] tweaked toml for git repo https://github.com/ad3ldev/rusty-sort written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ad3ldev/rusty-sort 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd13e9d80fe327af0847dd2789c26b6d88818a4543d2a7c076013ee9824bac35
[INFO] running `Command { std: "docker" "start" "-a" "cd13e9d80fe327af0847dd2789c26b6d88818a4543d2a7c076013ee9824bac35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd13e9d80fe327af0847dd2789c26b6d88818a4543d2a7c076013ee9824bac35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd13e9d80fe327af0847dd2789c26b6d88818a4543d2a7c076013ee9824bac35", kill_on_drop: false }`
[INFO] [stdout] cd13e9d80fe327af0847dd2789c26b6d88818a4543d2a7c076013ee9824bac35
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99e8ea3d8a92664f2128305aedf32bfa99b25399a575a5e4a4e8f94a81db1f26
[INFO] running `Command { std: "docker" "start" "-a" "99e8ea3d8a92664f2128305aedf32bfa99b25399a575a5e4a4e8f94a81db1f26", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling crossbeam-channel v0.5.8
[INFO] [stderr]    Compiling getrandom v0.2.9
[INFO] [stderr]    Compiling num_cpus v1.15.0
[INFO] [stderr]    Compiling crossbeam-deque v0.8.3
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rayon v1.7.0
[INFO] [stderr]    Compiling rusty-sort v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `serial_merge` is never used
[INFO] [stdout]  --> src/merge_sort.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn serial_merge(arr: &mut [u64], start: usize, mid: usize, end: usize) {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serial_merge_sort_helper` is never used
[INFO] [stdout]   --> src/merge_sort.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn serial_merge_sort_helper(arr: &mut [u64], left: usize, right: usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serial_merge_sort` is never used
[INFO] [stdout]   --> src/merge_sort.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn serial_merge_sort(arr: &mut [u64]) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parallel_merge_sort_helper` is never used
[INFO] [stdout]    --> src/merge_sort.rs:122:4
[INFO] [stdout]     |
[INFO] [stdout] 122 | fn parallel_merge_sort_helper(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parallel_merge_sort` is never used
[INFO] [stdout]    --> src/merge_sort.rs:159:8
[INFO] [stdout]     |
[INFO] [stdout] 159 | pub fn parallel_merge_sort(arr: &mut [u64], threads_num: usize) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.59s
[INFO] running `Command { std: "docker" "inspect" "99e8ea3d8a92664f2128305aedf32bfa99b25399a575a5e4a4e8f94a81db1f26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99e8ea3d8a92664f2128305aedf32bfa99b25399a575a5e4a4e8f94a81db1f26", kill_on_drop: false }`
[INFO] [stdout] 99e8ea3d8a92664f2128305aedf32bfa99b25399a575a5e4a4e8f94a81db1f26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 749cc4ef1a947203b3463f1e84648abe9384326f5f910a838e4b3966c70d6078
[INFO] running `Command { std: "docker" "start" "-a" "749cc4ef1a947203b3463f1e84648abe9384326f5f910a838e4b3966c70d6078", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusty-sort v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `serial_merge` is never used
[INFO] [stdout]  --> src/merge_sort.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn serial_merge(arr: &mut [u64], start: usize, mid: usize, end: usize) {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serial_merge_sort_helper` is never used
[INFO] [stdout]   --> src/merge_sort.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn serial_merge_sort_helper(arr: &mut [u64], left: usize, right: usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serial_merge_sort` is never used
[INFO] [stdout]   --> src/merge_sort.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn serial_merge_sort(arr: &mut [u64]) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parallel_merge_sort_helper` is never used
[INFO] [stdout]    --> src/merge_sort.rs:122:4
[INFO] [stdout]     |
[INFO] [stdout] 122 | fn parallel_merge_sort_helper(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parallel_merge_sort` is never used
[INFO] [stdout]    --> src/merge_sort.rs:159:8
[INFO] [stdout]     |
[INFO] [stdout] 159 | pub fn parallel_merge_sort(arr: &mut [u64], threads_num: usize) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "749cc4ef1a947203b3463f1e84648abe9384326f5f910a838e4b3966c70d6078", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "749cc4ef1a947203b3463f1e84648abe9384326f5f910a838e4b3966c70d6078", kill_on_drop: false }`
[INFO] [stdout] 749cc4ef1a947203b3463f1e84648abe9384326f5f910a838e4b3966c70d6078