[INFO] fetching crate chorus-tempo 0.1.0...
[INFO] testing chorus-tempo-0.1.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate chorus-tempo 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate chorus-tempo 0.1.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate chorus-tempo 0.1.0
[INFO] finished tweaking crates.io crate chorus-tempo 0.1.0
[INFO] tweaked toml for crates.io crate chorus-tempo 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded users v0.8.1
[INFO] [stderr]   Downloaded run_script v0.2.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "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] eac64613abbd5a83d55f3e460f4c10d59ad022f50cfe1f9878075d1fb69ef791
[INFO] running `Command { std: "docker" "start" "-a" "eac64613abbd5a83d55f3e460f4c10d59ad022f50cfe1f9878075d1fb69ef791", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eac64613abbd5a83d55f3e460f4c10d59ad022f50cfe1f9878075d1fb69ef791", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eac64613abbd5a83d55f3e460f4c10d59ad022f50cfe1f9878075d1fb69ef791", kill_on_drop: false }`
[INFO] [stdout] eac64613abbd5a83d55f3e460f4c10d59ad022f50cfe1f9878075d1fb69ef791
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 11e5fff71a7a0fd831d13e69fa5ff4e216f69b3abf90d2427e1b73e796f7ff78
[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" "11e5fff71a7a0fd831d13e69fa5ff4e216f69b3abf90d2427e1b73e796f7ff78", kill_on_drop: false }`
[INFO] [stderr]    Compiling want v0.2.0
[INFO] [stderr]    Compiling users v0.8.1
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]    Compiling publicsuffix v1.5.4
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling run_script v0.2.5
[INFO] [stderr]    Compiling h2 v0.1.26
[INFO] [stderr]    Compiling cookie_store v0.7.0
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling hyper v0.12.35
[INFO] [stderr]    Compiling hyper-tls v0.3.2
[INFO] [stderr]    Compiling reqwest v0.9.24
[INFO] [stderr]    Compiling chorus-tempo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]  --> src/main.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let (code, output, error) = run_script::run(
[INFO] [stdout]   |                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `error`
[INFO] [stdout]  --> src/main.rs:9:24
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let (code, output, error) = run_script::run(
[INFO] [stdout]   |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]   --> src/main.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let (code, output, error) = run_script::run(
[INFO] [stdout]    |          ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `error`
[INFO] [stdout]   --> src/main.rs:32:24
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let (code, output, error) = run_script::run(
[INFO] [stdout]    |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.73s
[INFO] running `Command { std: "docker" "inspect" "11e5fff71a7a0fd831d13e69fa5ff4e216f69b3abf90d2427e1b73e796f7ff78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11e5fff71a7a0fd831d13e69fa5ff4e216f69b3abf90d2427e1b73e796f7ff78", kill_on_drop: false }`
[INFO] [stdout] 11e5fff71a7a0fd831d13e69fa5ff4e216f69b3abf90d2427e1b73e796f7ff78
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3875ff91653b8a291f297dd285a9a00aa85a845e491f72d395c3ab21c6ad4de8
[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" "3875ff91653b8a291f297dd285a9a00aa85a845e491f72d395c3ab21c6ad4de8", kill_on_drop: false }`
[INFO] [stderr]    Compiling chorus-tempo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]  --> src/main.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let (code, output, error) = run_script::run(
[INFO] [stdout]   |                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `error`
[INFO] [stdout]  --> src/main.rs:9:24
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let (code, output, error) = run_script::run(
[INFO] [stdout]   |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]   --> src/main.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let (code, output, error) = run_script::run(
[INFO] [stdout]    |          ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `error`
[INFO] [stdout]   --> src/main.rs:32:24
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let (code, output, error) = run_script::run(
[INFO] [stdout]    |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.28s
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3875ff91653b8a291f297dd285a9a00aa85a845e491f72d395c3ab21c6ad4de8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3875ff91653b8a291f297dd285a9a00aa85a845e491f72d395c3ab21c6ad4de8", kill_on_drop: false }`
[INFO] [stdout] 3875ff91653b8a291f297dd285a9a00aa85a845e491f72d395c3ab21c6ad4de8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", 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] a35cc049ab422aba4b200eaaab7d9c320778229352180a851dd79f8e58545bfc
[INFO] running `Command { std: "docker" "start" "-a" "a35cc049ab422aba4b200eaaab7d9c320778229352180a851dd79f8e58545bfc", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> src/main.rs:9:16
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 9 |     let (code, output, error) = run_script::run(
[INFO] [stdout] 
[INFO] [stderr]   |                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `error`
[INFO] [stderr]  --> src/main.rs:9:24
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let (code, output, error) = run_script::run(
[INFO] [stderr]   |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `code`
[INFO] [stderr]   --> src/main.rs:32:10
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let (code, output, error) = run_script::run(
[INFO] [stderr]    |          ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `error`
[INFO] [stderr]   --> src/main.rs:32:24
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let (code, output, error) = run_script::run(
[INFO] [stderr]    |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/chorus_tempo-41c55e6a5b403ba7
[INFO] running `Command { std: "docker" "inspect" "a35cc049ab422aba4b200eaaab7d9c320778229352180a851dd79f8e58545bfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a35cc049ab422aba4b200eaaab7d9c320778229352180a851dd79f8e58545bfc", kill_on_drop: false }`
[INFO] [stdout] a35cc049ab422aba4b200eaaab7d9c320778229352180a851dd79f8e58545bfc