[INFO] fetching crate fine_grained 0.1.2...
[INFO] building fine_grained-0.1.2 against 1.49.0 for beta-1.50-1
[INFO] extracting crate fine_grained 0.1.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate fine_grained 0.1.2 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fine_grained 0.1.2
[INFO] finished tweaking crates.io crate fine_grained 0.1.2
[INFO] tweaked toml for crates.io crate fine_grained 0.1.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 42a58849a21870a433058b7e47f913e3272bcaecb0641dfd6e0c48b7a7b8194b
[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" "42a58849a21870a433058b7e47f913e3272bcaecb0641dfd6e0c48b7a7b8194b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42a58849a21870a433058b7e47f913e3272bcaecb0641dfd6e0c48b7a7b8194b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42a58849a21870a433058b7e47f913e3272bcaecb0641dfd6e0c48b7a7b8194b", kill_on_drop: false }`
[INFO] [stdout] 42a58849a21870a433058b7e47f913e3272bcaecb0641dfd6e0c48b7a7b8194b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 13003053748a5a054c743964adb3f27ddcc2b645b22d38cfc824fec857d1f617
[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" "13003053748a5a054c743964adb3f27ddcc2b645b22d38cfc824fec857d1f617", kill_on_drop: false }`
[INFO] [stderr]    Compiling fine_grained v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/stopwatch.rs:91:17
[INFO] [stdout]    |
[INFO] [stdout] 91 | /                 /// If the stopwatch is currently running, the total time is the saved total time
[INFO] [stdout] 92 | |                 /// plus the current lap's duration up to this point.
[INFO] [stdout]    | |_____________________________________________________________________^
[INFO] [stdout] 93 |                   let current_time: u64 = time::precise_time_ns();
[INFO] [stdout]    |                   ------------------------------------------------ rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` 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 1.00s
[INFO] running `Command { std: "docker" "inspect" "13003053748a5a054c743964adb3f27ddcc2b645b22d38cfc824fec857d1f617", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13003053748a5a054c743964adb3f27ddcc2b645b22d38cfc824fec857d1f617", kill_on_drop: false }`
[INFO] [stdout] 13003053748a5a054c743964adb3f27ddcc2b645b22d38cfc824fec857d1f617
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90d335813d898135ee090bac141492ce6923f49cfc3c7db0cf3a0627023e383f
[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" "90d335813d898135ee090bac141492ce6923f49cfc3c7db0cf3a0627023e383f", kill_on_drop: false }`
[INFO] [stderr]    Compiling fine_grained v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/stopwatch.rs:91:17
[INFO] [stdout]    |
[INFO] [stdout] 91 | /                 /// If the stopwatch is currently running, the total time is the saved total time
[INFO] [stdout] 92 | |                 /// plus the current lap's duration up to this point.
[INFO] [stdout]    | |_____________________________________________________________________^
[INFO] [stdout] 93 |                   let current_time: u64 = time::precise_time_ns();
[INFO] [stdout]    |                   ------------------------------------------------ rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/stopwatch.rs:91:17
[INFO] [stdout]    |
[INFO] [stdout] 91 | /                 /// If the stopwatch is currently running, the total time is the saved total time
[INFO] [stdout] 92 | |                 /// plus the current lap's duration up to this point.
[INFO] [stdout]    | |_____________________________________________________________________^
[INFO] [stdout] 93 |                   let current_time: u64 = time::precise_time_ns();
[INFO] [stdout]    |                   ------------------------------------------------ rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` 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 2.39s
[INFO] running `Command { std: "docker" "inspect" "90d335813d898135ee090bac141492ce6923f49cfc3c7db0cf3a0627023e383f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90d335813d898135ee090bac141492ce6923f49cfc3c7db0cf3a0627023e383f", kill_on_drop: false }`
[INFO] [stdout] 90d335813d898135ee090bac141492ce6923f49cfc3c7db0cf3a0627023e383f