[INFO] fetching crate sampsyn 0.1.2...
[INFO] testing sampsyn-0.1.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate sampsyn 0.1.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate sampsyn 0.1.2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sampsyn 0.1.2
[INFO] finished tweaking crates.io crate sampsyn 0.1.2
[INFO] tweaked toml for crates.io crate sampsyn 0.1.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate sampsyn 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 115a98330c3268026626f5348a6f999f467bcc6fa422381a530b20626c33c7c5
[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" "115a98330c3268026626f5348a6f999f467bcc6fa422381a530b20626c33c7c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "115a98330c3268026626f5348a6f999f467bcc6fa422381a530b20626c33c7c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "115a98330c3268026626f5348a6f999f467bcc6fa422381a530b20626c33c7c5", kill_on_drop: false }`
[INFO] [stdout] 115a98330c3268026626f5348a6f999f467bcc6fa422381a530b20626c33c7c5
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bcd2ec00e802ae8c7ccef8596dbb8c2cc6227856f6265ae651a141d00f3caa1b
[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" "bcd2ec00e802ae8c7ccef8596dbb8c2cc6227856f6265ae651a141d00f3caa1b", kill_on_drop: false }`
[INFO] [stderr]    Compiling sdl2 v0.34.5
[INFO] [stderr]    Compiling simpleio v0.1.2
[INFO] [stderr]    Compiling sdl2-sys v0.34.5
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling sampsyn v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `hz`
[INFO] [stdout]   --> src/bin.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let hz = 130.81; // 130.81 = c3, 261.63 = c4, 523.25 = c5
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_hz`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` 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 6.89s
[INFO] running `Command { std: "docker" "inspect" "bcd2ec00e802ae8c7ccef8596dbb8c2cc6227856f6265ae651a141d00f3caa1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcd2ec00e802ae8c7ccef8596dbb8c2cc6227856f6265ae651a141d00f3caa1b", kill_on_drop: false }`
[INFO] [stdout] bcd2ec00e802ae8c7ccef8596dbb8c2cc6227856f6265ae651a141d00f3caa1b
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f92d2bfaa1b3020692cb17d89c45338a9dcd9c52004ba686d9e17dac44e58ce4
[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" "f92d2bfaa1b3020692cb17d89c45338a9dcd9c52004ba686d9e17dac44e58ce4", kill_on_drop: false }`
[INFO] [stderr]    Compiling sampsyn v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `hz`
[INFO] [stdout]   --> src/bin.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let hz = 130.81; // 130.81 = c3, 261.63 = c4, 523.25 = c5
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_hz`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` 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 1.07s
[INFO] running `Command { std: "docker" "inspect" "f92d2bfaa1b3020692cb17d89c45338a9dcd9c52004ba686d9e17dac44e58ce4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f92d2bfaa1b3020692cb17d89c45338a9dcd9c52004ba686d9e17dac44e58ce4", kill_on_drop: false }`
[INFO] [stdout] f92d2bfaa1b3020692cb17d89c45338a9dcd9c52004ba686d9e17dac44e58ce4
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] c46bfc35a1ac81c38ec15bff9895bef39fd53a31ddb352b719f0e51a67fbcdb7
[INFO] running `Command { std: "docker" "start" "-a" "c46bfc35a1ac81c38ec15bff9895bef39fd53a31ddb352b719f0e51a67fbcdb7", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `hz`
[INFO] [stdout] running 1 test
[INFO] [stderr]   --> src/bin.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let hz = 130.81; // 130.81 = c3, 261.63 = c4, 523.25 = c5
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_hz`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `sampsyn` (bin "testbin" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sampsyn-d673057af76e2ede)
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/testbin-5a8bc765fe6aed12)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests sampsyn
[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] [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" "c46bfc35a1ac81c38ec15bff9895bef39fd53a31ddb352b719f0e51a67fbcdb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c46bfc35a1ac81c38ec15bff9895bef39fd53a31ddb352b719f0e51a67fbcdb7", kill_on_drop: false }`
[INFO] [stdout] c46bfc35a1ac81c38ec15bff9895bef39fd53a31ddb352b719f0e51a67fbcdb7