[INFO] cloning repository https://github.com/kallisti-dev/sort_practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kallisti-dev/sort_practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkallisti-dev%2Fsort_practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkallisti-dev%2Fsort_practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 39a2949e640700680fd9e985febb6b537b6be62d
[INFO] building kallisti-dev/sort_practice 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%2Fkallisti-dev%2Fsort_practice" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kallisti-dev/sort_practice 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/kallisti-dev/sort_practice
[INFO] finished tweaking git repo https://github.com/kallisti-dev/sort_practice
[INFO] tweaked toml for git repo https://github.com/kallisti-dev/sort_practice written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kallisti-dev/sort_practice 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] a1dba56064c3c400bdc158a803103931277e3799070d6bc7bf144e16794e57f7
[INFO] running `Command { std: "docker" "start" "-a" "a1dba56064c3c400bdc158a803103931277e3799070d6bc7bf144e16794e57f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1dba56064c3c400bdc158a803103931277e3799070d6bc7bf144e16794e57f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1dba56064c3c400bdc158a803103931277e3799070d6bc7bf144e16794e57f7", kill_on_drop: false }`
[INFO] [stdout] a1dba56064c3c400bdc158a803103931277e3799070d6bc7bf144e16794e57f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 439bbf422b81af4cf155bc222283c3e2b7b3518fae3eea568aed11d1a4e15c37
[INFO] running `Command { std: "docker" "start" "-a" "439bbf422b81af4cf155bc222283c3e2b7b3518fae3eea568aed11d1a4e15c37", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.10
[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 sort_practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/bubble_sort.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn bubble_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                               ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/insertion_sort.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn insertion_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                                  ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/merge_sort.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn merge_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                              ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/quick_sort.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn quick_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                              ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/selection_sort.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn selection_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                                  ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bubble_sort` is never used
[INFO] [stdout]  --> src/bubble_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn bubble_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `insertion_sort` is never used
[INFO] [stdout]  --> src/insertion_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn insertion_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `merge_sort` is never used
[INFO] [stdout]  --> src/merge_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn merge_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `quick_sort` is never used
[INFO] [stdout]  --> src/quick_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn quick_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `selection_sort` is never used
[INFO] [stdout]  --> src/selection_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn selection_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.81s
[INFO] running `Command { std: "docker" "inspect" "439bbf422b81af4cf155bc222283c3e2b7b3518fae3eea568aed11d1a4e15c37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "439bbf422b81af4cf155bc222283c3e2b7b3518fae3eea568aed11d1a4e15c37", kill_on_drop: false }`
[INFO] [stdout] 439bbf422b81af4cf155bc222283c3e2b7b3518fae3eea568aed11d1a4e15c37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] d9e4f8c8ae600ed33a887889140712b5a442bb5403f23b485a8bcd7226de779f
[INFO] running `Command { std: "docker" "start" "-a" "d9e4f8c8ae600ed33a887889140712b5a442bb5403f23b485a8bcd7226de779f", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/bubble_sort.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn bubble_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                               ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/insertion_sort.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn insertion_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                                  ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/merge_sort.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn merge_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                              ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/quick_sort.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn quick_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                              ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/selection_sort.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn selection_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                                  ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bubble_sort` is never used
[INFO] [stdout]  --> src/bubble_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn bubble_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `insertion_sort` is never used
[INFO] [stdout]  --> src/insertion_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn insertion_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `merge_sort` is never used
[INFO] [stdout]  --> src/merge_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn merge_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `quick_sort` is never used
[INFO] [stdout]  --> src/quick_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn quick_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `selection_sort` is never used
[INFO] [stdout]  --> src/selection_sort.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn selection_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling sort_practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/bubble_sort.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn bubble_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                               ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/insertion_sort.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn insertion_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                                  ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/merge_sort.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn merge_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                              ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/quick_sort.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn quick_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                              ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/selection_sort.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn selection_sort<T: Ord + Copy>(a: &mut [T]) {
[INFO] [stdout]   |                                  ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "d9e4f8c8ae600ed33a887889140712b5a442bb5403f23b485a8bcd7226de779f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9e4f8c8ae600ed33a887889140712b5a442bb5403f23b485a8bcd7226de779f", kill_on_drop: false }`
[INFO] [stdout] d9e4f8c8ae600ed33a887889140712b5a442bb5403f23b485a8bcd7226de779f