[INFO] cloning repository https://github.com/old-student/algorithms1-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/old-student/algorithms1-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fold-student%2Falgorithms1-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fold-student%2Falgorithms1-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9539fc06f275c37625a51292eb06c72621639517
[INFO] testing old-student/algorithms1-rust against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fold-student%2Falgorithms1-rust" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/old-student/algorithms1-rust on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/old-student/algorithms1-rust
[INFO] finished tweaking git repo https://github.com/old-student/algorithms1-rust
[INFO] tweaked toml for git repo https://github.com/old-student/algorithms1-rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/old-student/algorithms1-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "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] e7200189a6aa3c6d0eea9b70f059f457910c4726770b3bd04a303c8f6779138c
[INFO] running `Command { std: "docker" "start" "-a" "e7200189a6aa3c6d0eea9b70f059f457910c4726770b3bd04a303c8f6779138c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7200189a6aa3c6d0eea9b70f059f457910c4726770b3bd04a303c8f6779138c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7200189a6aa3c6d0eea9b70f059f457910c4726770b3bd04a303c8f6779138c", kill_on_drop: false }`
[INFO] [stdout] e7200189a6aa3c6d0eea9b70f059f457910c4726770b3bd04a303c8f6779138c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--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] 0ba5aa802828784b0d49ec7714e177f903b9813a736026d741e5bfd4def08dca
[INFO] running `Command { std: "docker" "start" "-a" "0ba5aa802828784b0d49ec7714e177f903b9813a736026d741e5bfd4def08dca", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.0
[INFO] [stderr]    Compiling libc v0.1.8
[INFO] [stderr]    Compiling winapi v0.1.23
[INFO] [stderr]    Compiling kernel32-sys v0.1.2
[INFO] [stderr]    Compiling time v0.1.30
[INFO] [stderr]    Compiling algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/inversions_counter/mod.rs:65:18
[INFO] [stdout]    |
[INFO] [stdout] 65 |         for i in (begin_left..end_right+1) {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.63s
[INFO] running `Command { std: "docker" "inspect" "0ba5aa802828784b0d49ec7714e177f903b9813a736026d741e5bfd4def08dca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ba5aa802828784b0d49ec7714e177f903b9813a736026d741e5bfd4def08dca", kill_on_drop: false }`
[INFO] [stdout] 0ba5aa802828784b0d49ec7714e177f903b9813a736026d741e5bfd4def08dca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2836a26d70bdde707e3d69d09c69d547c5146c8e70f6eebdb9ef3cb3c7539a19
[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" "2836a26d70bdde707e3d69d09c69d547c5146c8e70f6eebdb9ef3cb3c7539a19", kill_on_drop: false }`
[INFO] [stderr]    Compiling algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/inversions_counter/mod.rs:65:18
[INFO] [stdout]    |
[INFO] [stdout] 65 |         for i in (begin_left..end_right+1) {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "2836a26d70bdde707e3d69d09c69d547c5146c8e70f6eebdb9ef3cb3c7539a19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2836a26d70bdde707e3d69d09c69d547c5146c8e70f6eebdb9ef3cb3c7539a19", kill_on_drop: false }`
[INFO] [stdout] 2836a26d70bdde707e3d69d09c69d547c5146c8e70f6eebdb9ef3cb3c7539a19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 340fdbf9c1db9705251bd13309956413e1c0e487b4759c78e09304e235b8af25
[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" "340fdbf9c1db9705251bd13309956413e1c0e487b4759c78e09304e235b8af25", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]   --> src/inversions_counter/mod.rs:65:18
[INFO] [stderr]    |
[INFO] [stderr] 65 |         for i in (begin_left..end_right+1) {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `algorithms` (bin "algorithms" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/algorithms-37dbd135f8f3e6d7)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "340fdbf9c1db9705251bd13309956413e1c0e487b4759c78e09304e235b8af25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "340fdbf9c1db9705251bd13309956413e1c0e487b4759c78e09304e235b8af25", kill_on_drop: false }`
[INFO] [stdout] 340fdbf9c1db9705251bd13309956413e1c0e487b4759c78e09304e235b8af25