[INFO] cloning repository https://github.com/Noah-Kennedy/rust_ack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Noah-Kennedy/rust_ack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNoah-Kennedy%2Frust_ack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNoah-Kennedy%2Frust_ack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8eff99692a6d1ce6a5124c1be7df0d2efd058f81
[INFO] testing Noah-Kennedy/rust_ack against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNoah-Kennedy%2Frust_ack" "/workspace/builds/worker-79/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-79/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Noah-Kennedy/rust_ack on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Noah-Kennedy/rust_ack
[INFO] finished tweaking git repo https://github.com/Noah-Kennedy/rust_ack
[INFO] tweaked toml for git repo https://github.com/Noah-Kennedy/rust_ack written to /workspace/builds/worker-79/source/Cargo.toml
[INFO] crate git repo https://github.com/Noah-Kennedy/rust_ack already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 553ba21532d8ea0ad2c1e33df33f44d2844027bf54b322682a29d601864e024a
[INFO] running `Command { std: "docker" "start" "-a" "553ba21532d8ea0ad2c1e33df33f44d2844027bf54b322682a29d601864e024a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "553ba21532d8ea0ad2c1e33df33f44d2844027bf54b322682a29d601864e024a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "553ba21532d8ea0ad2c1e33df33f44d2844027bf54b322682a29d601864e024a", kill_on_drop: false }`
[INFO] [stdout] 553ba21532d8ea0ad2c1e33df33f44d2844027bf54b322682a29d601864e024a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 61e9e28326494d9dd27698ac60a2a6ce76c9fa3c4980f4c382291066d4623487
[INFO] running `Command { std: "docker" "start" "-a" "61e9e28326494d9dd27698ac60a2a6ce76c9fa3c4980f4c382291066d4623487", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_ack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `ack_simple`
[INFO] [stdout]  --> src/main.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn ack_simple(m: u64, n: u64) -> u64 {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ack_iter`
[INFO] [stdout]   --> src/main.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn ack_iter(m: u64, n: u64) -> u64 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hyperoperate_pure`
[INFO] [stdout]   --> src/main.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn hyperoperate_pure(m: u64, a: u64, b: u64) -> u64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ack_hyp`
[INFO] [stdout]   --> src/main.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn ack_hyp(m: u64, n: u64) -> u64 {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `bench_ack`
[INFO] [stdout]   --> src/main.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn bench_ack<F>(ack: F, bench: &mut Bencher) where F: Fn(u64, u64) -> u64 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `Command { std: "docker" "inspect" "61e9e28326494d9dd27698ac60a2a6ce76c9fa3c4980f4c382291066d4623487", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61e9e28326494d9dd27698ac60a2a6ce76c9fa3c4980f4c382291066d4623487", kill_on_drop: false }`
[INFO] [stdout] 61e9e28326494d9dd27698ac60a2a6ce76c9fa3c4980f4c382291066d4623487
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8fdae342a39af4fa3e1f0e33e57d4b7a79f89953b506dd8c7993a38dad79ef50
[INFO] running `Command { std: "docker" "start" "-a" "8fdae342a39af4fa3e1f0e33e57d4b7a79f89953b506dd8c7993a38dad79ef50", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_ack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `ack_simple`
[INFO] [stdout]  --> src/main.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn ack_simple(m: u64, n: u64) -> u64 {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` 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 1.16s
[INFO] running `Command { std: "docker" "inspect" "8fdae342a39af4fa3e1f0e33e57d4b7a79f89953b506dd8c7993a38dad79ef50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fdae342a39af4fa3e1f0e33e57d4b7a79f89953b506dd8c7993a38dad79ef50", kill_on_drop: false }`
[INFO] [stdout] 8fdae342a39af4fa3e1f0e33e57d4b7a79f89953b506dd8c7993a38dad79ef50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 05cdedc53d5eebc5c6db0f80649cc23e6ee449d01423bfaf2b5bd48fe8854488
[INFO] running `Command { std: "docker" "start" "-a" "05cdedc53d5eebc5c6db0f80649cc23e6ee449d01423bfaf2b5bd48fe8854488", kill_on_drop: false }`
[INFO] [stderr] warning: function is never used: `ack_simple`
[INFO] [stderr]  --> src/main.rs:6:4
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn ack_simple(m: u64, n: u64) -> u64 {
[INFO] [stderr]   |    ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_ack` (bin "rust_ack" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_ack-f78f37b74ea42c76)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test bench_ack_hyp ... ok
[INFO] [stdout] test bench_ack_iter ... ok
[INFO] [stdout] test bench_ack_opt ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "05cdedc53d5eebc5c6db0f80649cc23e6ee449d01423bfaf2b5bd48fe8854488", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05cdedc53d5eebc5c6db0f80649cc23e6ee449d01423bfaf2b5bd48fe8854488", kill_on_drop: false }`
[INFO] [stdout] 05cdedc53d5eebc5c6db0f80649cc23e6ee449d01423bfaf2b5bd48fe8854488