[INFO] cloning repository https://github.com/GCYYfun/OSTEP_RUST
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/GCYYfun/OSTEP_RUST" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGCYYfun%2FOSTEP_RUST", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGCYYfun%2FOSTEP_RUST'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dc77200653917d10de7500c9c7f610d7af0a68ad
[INFO] testing GCYYfun/OSTEP_RUST against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGCYYfun%2FOSTEP_RUST" "/workspace/builds/worker-65/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-65/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/GCYYfun/OSTEP_RUST on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/GCYYfun/OSTEP_RUST
[INFO] finished tweaking git repo https://github.com/GCYYfun/OSTEP_RUST
[INFO] tweaked toml for git repo https://github.com/GCYYfun/OSTEP_RUST written to /workspace/builds/worker-65/source/Cargo.toml
[INFO] crate git repo https://github.com/GCYYfun/OSTEP_RUST already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5acafb77da56ba835944b9b82e12ecbabd3da1834739dc4ee6eaccdfb46e9abd
[INFO] running `Command { std: "docker" "start" "-a" "5acafb77da56ba835944b9b82e12ecbabd3da1834739dc4ee6eaccdfb46e9abd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5acafb77da56ba835944b9b82e12ecbabd3da1834739dc4ee6eaccdfb46e9abd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5acafb77da56ba835944b9b82e12ecbabd3da1834739dc4ee6eaccdfb46e9abd", kill_on_drop: false }`
[INFO] [stdout] 5acafb77da56ba835944b9b82e12ecbabd3da1834739dc4ee6eaccdfb46e9abd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cda7ba50347f5e8d43bbefd94f4ff59fb0c47a785178da6efd63c31d6ebf64b9
[INFO] running `Command { std: "docker" "start" "-a" "cda7ba50347f5e8d43bbefd94f4ff59fb0c47a785178da6efd63c31d6ebf64b9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling rand_core v0.6.1
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling ostep-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/cpu_api/fork.rs:138:13
[INFO] [stdout]     |
[INFO] [stdout] 138 |             &pmask.insert(level - 1, false);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 138 |             let _ = &pmask.insert(level - 1, false);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/cpu_api/fork.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 141 |         &pmask.insert(level, true);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 141 |         let _ = &pmask.insert(level, true);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 00s
[INFO] running `Command { std: "docker" "inspect" "cda7ba50347f5e8d43bbefd94f4ff59fb0c47a785178da6efd63c31d6ebf64b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cda7ba50347f5e8d43bbefd94f4ff59fb0c47a785178da6efd63c31d6ebf64b9", kill_on_drop: false }`
[INFO] [stdout] cda7ba50347f5e8d43bbefd94f4ff59fb0c47a785178da6efd63c31d6ebf64b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 680933d024f2df7c72412475ec72298dbce1ed55b0a7e5fdb0eda2aa26f47243
[INFO] running `Command { std: "docker" "start" "-a" "680933d024f2df7c72412475ec72298dbce1ed55b0a7e5fdb0eda2aa26f47243", kill_on_drop: false }`
[INFO] [stderr]    Compiling ostep-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/cpu_api/fork.rs:138:13
[INFO] [stdout]     |
[INFO] [stdout] 138 |             &pmask.insert(level - 1, false);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 138 |             let _ = &pmask.insert(level - 1, false);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/cpu_api/fork.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 141 |         &pmask.insert(level, true);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 141 |         let _ = &pmask.insert(level, true);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.50s
[INFO] running `Command { std: "docker" "inspect" "680933d024f2df7c72412475ec72298dbce1ed55b0a7e5fdb0eda2aa26f47243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "680933d024f2df7c72412475ec72298dbce1ed55b0a7e5fdb0eda2aa26f47243", kill_on_drop: false }`
[INFO] [stdout] 680933d024f2df7c72412475ec72298dbce1ed55b0a7e5fdb0eda2aa26f47243
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-65/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a2304b5b78cea7e98acfc1f7462fd7e4808c2e24f8a1603944e30f9f0e084446
[INFO] running `Command { std: "docker" "start" "-a" "a2304b5b78cea7e98acfc1f7462fd7e4808c2e24f8a1603944e30f9f0e084446", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/cpu_api/fork.rs:138:13
[INFO] [stderr]     |
[INFO] [stderr] 138 |             &pmask.insert(level - 1, false);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 138 |             let _ = &pmask.insert(level - 1, false);
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/cpu_api/fork.rs:141:9
[INFO] [stderr]     |
[INFO] [stderr] 141 |         &pmask.insert(level, true);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 141 |         let _ = &pmask.insert(level, true);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `ostep-rust` (bin "ostep-rust" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.61s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/ostep_rust-00b4a7ad5b225886)
[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" "a2304b5b78cea7e98acfc1f7462fd7e4808c2e24f8a1603944e30f9f0e084446", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2304b5b78cea7e98acfc1f7462fd7e4808c2e24f8a1603944e30f9f0e084446", kill_on_drop: false }`
[INFO] [stdout] a2304b5b78cea7e98acfc1f7462fd7e4808c2e24f8a1603944e30f9f0e084446