[INFO] cloning repository https://github.com/Adrianbakke/busy_beaver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Adrianbakke/busy_beaver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAdrianbakke%2Fbusy_beaver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAdrianbakke%2Fbusy_beaver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bc8854b1a80ff928fcf81f39966c74f8eb868fd6
[INFO] testing Adrianbakke/busy_beaver against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAdrianbakke%2Fbusy_beaver" "/workspace/builds/worker-94/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-94/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Adrianbakke/busy_beaver on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Adrianbakke/busy_beaver
[INFO] finished tweaking git repo https://github.com/Adrianbakke/busy_beaver
[INFO] tweaked toml for git repo https://github.com/Adrianbakke/busy_beaver written to /workspace/builds/worker-94/source/Cargo.toml
[INFO] crate git repo https://github.com/Adrianbakke/busy_beaver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5e7d51f8b483de51062887aec758aa51552a14e30dc8223a6d4176c226d18b1f
[INFO] running `Command { std: "docker" "start" "-a" "5e7d51f8b483de51062887aec758aa51552a14e30dc8223a6d4176c226d18b1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e7d51f8b483de51062887aec758aa51552a14e30dc8223a6d4176c226d18b1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e7d51f8b483de51062887aec758aa51552a14e30dc8223a6d4176c226d18b1f", kill_on_drop: false }`
[INFO] [stdout] 5e7d51f8b483de51062887aec758aa51552a14e30dc8223a6d4176c226d18b1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1865f7ce69534c752d8a2338ad54e97c74e5bdfd4ac15b348109148a8e52f4e4
[INFO] running `Command { std: "docker" "start" "-a" "1865f7ce69534c752d8a2338ad54e97c74e5bdfd4ac15b348109148a8e52f4e4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.73
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling dirs-sys v0.3.5
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling term v0.6.1
[INFO] [stderr]    Compiling busy_beaver_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `best_action_holder` is assigned to, but never used
[INFO] [stdout]    --> src/main.rs:388:13
[INFO] [stdout]     |
[INFO] [stdout] 388 |     let mut best_action_holder = Stats::default();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]     = note: consider using `_best_action_holder` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `best_action_holder` is never read
[INFO] [stdout]    --> src/main.rs:393:17
[INFO] [stdout]     |
[INFO] [stdout] 393 |                 best_action_holder = stats.clone();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `highest_score`
[INFO] [stdout]    --> src/main.rs:352:4
[INFO] [stdout]     |
[INFO] [stdout] 352 | fn highest_score(stats: &Vec<Stats>) -> &Stats {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `highest_action`
[INFO] [stdout]    --> src/main.rs:362:4
[INFO] [stdout]     |
[INFO] [stdout] 362 | fn highest_action(stats: &Vec<Stats>) -> &Stats {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.62s
[INFO] running `Command { std: "docker" "inspect" "1865f7ce69534c752d8a2338ad54e97c74e5bdfd4ac15b348109148a8e52f4e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1865f7ce69534c752d8a2338ad54e97c74e5bdfd4ac15b348109148a8e52f4e4", kill_on_drop: false }`
[INFO] [stdout] 1865f7ce69534c752d8a2338ad54e97c74e5bdfd4ac15b348109148a8e52f4e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0e769a39ed6601668b54d3e4b05c00751f955b25fc817e696ba839fc839198c2
[INFO] running `Command { std: "docker" "start" "-a" "0e769a39ed6601668b54d3e4b05c00751f955b25fc817e696ba839fc839198c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling busy_beaver_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `best_action_holder` is assigned to, but never used
[INFO] [stdout]    --> src/main.rs:388:13
[INFO] [stdout]     |
[INFO] [stdout] 388 |     let mut best_action_holder = Stats::default();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]     = note: consider using `_best_action_holder` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `best_action_holder` is never read
[INFO] [stdout]    --> src/main.rs:393:17
[INFO] [stdout]     |
[INFO] [stdout] 393 |                 best_action_holder = stats.clone();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `highest_score`
[INFO] [stdout]    --> src/main.rs:352:4
[INFO] [stdout]     |
[INFO] [stdout] 352 | fn highest_score(stats: &Vec<Stats>) -> &Stats {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `highest_action`
[INFO] [stdout]    --> src/main.rs:362:4
[INFO] [stdout]     |
[INFO] [stdout] 362 | fn highest_action(stats: &Vec<Stats>) -> &Stats {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `Command { std: "docker" "inspect" "0e769a39ed6601668b54d3e4b05c00751f955b25fc817e696ba839fc839198c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e769a39ed6601668b54d3e4b05c00751f955b25fc817e696ba839fc839198c2", kill_on_drop: false }`
[INFO] [stdout] 0e769a39ed6601668b54d3e4b05c00751f955b25fc817e696ba839fc839198c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d2f840a1f294686088f6068ccc56bc626fbc4a2fb07e32cba7dc95c12dbb9124
[INFO] running `Command { std: "docker" "start" "-a" "d2f840a1f294686088f6068ccc56bc626fbc4a2fb07e32cba7dc95c12dbb9124", kill_on_drop: false }`
[INFO] [stderr] warning: variable `best_action_holder` is assigned to, but never used
[INFO] [stderr]    --> src/main.rs:388:13
[INFO] [stderr]     |
[INFO] [stderr] 388 |     let mut best_action_holder = Stats::default();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]     = note: consider using `_best_action_holder` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `best_action_holder` is never read
[INFO] [stderr]    --> src/main.rs:393:17
[INFO] [stderr]     |
[INFO] [stderr] 393 |                 best_action_holder = stats.clone();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `highest_score`
[INFO] [stderr]    --> src/main.rs:352:4
[INFO] [stderr]     |
[INFO] [stderr] 352 | fn highest_score(stats: &Vec<Stats>) -> &Stats {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `highest_action`
[INFO] [stderr]    --> src/main.rs:362:4
[INFO] [stderr]     |
[INFO] [stderr] 362 | fn highest_action(stats: &Vec<Stats>) -> &Stats {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `busy_beaver_rs` (bin "busy_beaver_rs" test) generated 4 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/busy_beaver_rs-e6daadb50e869c65)
[INFO] [stdout] 
[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" "d2f840a1f294686088f6068ccc56bc626fbc4a2fb07e32cba7dc95c12dbb9124", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2f840a1f294686088f6068ccc56bc626fbc4a2fb07e32cba7dc95c12dbb9124", kill_on_drop: false }`
[INFO] [stdout] d2f840a1f294686088f6068ccc56bc626fbc4a2fb07e32cba7dc95c12dbb9124