[INFO] crate camctl_rs 0.1.2 is already in cache
[INFO] testing camctl_rs-0.1.2 against beta-2020-07-24 for beta-1.46-1
[INFO] extracting crate camctl_rs 0.1.2 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate camctl_rs 0.1.2 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate camctl_rs 0.1.2
[INFO] finished tweaking crates.io crate camctl_rs 0.1.2
[INFO] tweaked toml for crates.io crate camctl_rs 0.1.2 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0641b5b6cbfc5395d3f7658495a2635b62c348d42a5e4ec16848756c8439baf8
[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" "0641b5b6cbfc5395d3f7658495a2635b62c348d42a5e4ec16848756c8439baf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0641b5b6cbfc5395d3f7658495a2635b62c348d42a5e4ec16848756c8439baf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0641b5b6cbfc5395d3f7658495a2635b62c348d42a5e4ec16848756c8439baf8", kill_on_drop: false }`
[INFO] [stdout] 0641b5b6cbfc5395d3f7658495a2635b62c348d42a5e4ec16848756c8439baf8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 699502a222df2c3769506ebe22769ce57614429acca4e748976e8a8f2c543567
[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" "699502a222df2c3769506ebe22769ce57614429acca4e748976e8a8f2c543567", kill_on_drop: false }`
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling usb-device v0.2.5
[INFO] [stderr]    Compiling libusb-sys v0.2.3
[INFO] [stderr]    Compiling bit-set v0.2.0
[INFO] [stderr]    Compiling libusb v0.3.0
[INFO] [stderr]    Compiling camctl_rs v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.87s
[INFO] running `Command { std: "docker" "inspect" "699502a222df2c3769506ebe22769ce57614429acca4e748976e8a8f2c543567", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "699502a222df2c3769506ebe22769ce57614429acca4e748976e8a8f2c543567", kill_on_drop: false }`
[INFO] [stdout] 699502a222df2c3769506ebe22769ce57614429acca4e748976e8a8f2c543567
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 10622e69abfa9402ae81da60a8289c6262de994ef34439d1f6eb364000ed4d35
[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" "10622e69abfa9402ae81da60a8289c6262de994ef34439d1f6eb364000ed4d35", kill_on_drop: false }`
[INFO] [stderr]    Compiling camctl_rs v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "10622e69abfa9402ae81da60a8289c6262de994ef34439d1f6eb364000ed4d35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10622e69abfa9402ae81da60a8289c6262de994ef34439d1f6eb364000ed4d35", kill_on_drop: false }`
[INFO] [stdout] 10622e69abfa9402ae81da60a8289c6262de994ef34439d1f6eb364000ed4d35
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7b0dcbed698d3b44f8371f3a39c360b53cd629eb85e75da1a5ea5b59e19ba130
[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" "7b0dcbed698d3b44f8371f3a39c360b53cd629eb85e75da1a5ea5b59e19ba130", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/camctl_rs-3150d5f009a6b841
[INFO] [stderr]    Doc-tests camctl_rs
[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
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/cam.rs - cam::Kraken (line 16) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/cam.rs - cam::Kraken (line 16) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `camctl_rs::Kraken`
[INFO] [stdout]  --> src/cam.rs:17:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use camctl_rs::Kraken;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ no `Kraken` in the root
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
[INFO] [stdout]   --> src/cam.rs:19:11
[INFO] [stdout]    |
[INFO] [stdout] 3  | / fn main() {
[INFO] [stdout] 4  | | use camctl_rs::Kraken;
[INFO] [stdout] 5  | |
[INFO] [stdout] 6  | | let ctx = libusb::Context::new()?;
[INFO] [stdout]    | |           ^^^^^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] ...  |
[INFO] [stdout] 9  | | kraken.set_fan(75); // sets the fan speed to 75%
[INFO] [stdout] 10 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::ops::Try` is not implemented for `()`
[INFO] [stdout]    = note: required by `std::ops::Try::from_error`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
[INFO] [stdout]   --> src/cam.rs:20:14
[INFO] [stdout]    |
[INFO] [stdout] 3  | / fn main() {
[INFO] [stdout] 4  | | use camctl_rs::Kraken;
[INFO] [stdout] 5  | |
[INFO] [stdout] 6  | | let ctx = libusb::Context::new()?;
[INFO] [stdout] 7  | | let kraken = Kraken::from(&ctx)?;
[INFO] [stdout]    | |              ^^^^^^^^^^^^^^^^^^^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 8  | |
[INFO] [stdout] 9  | | kraken.set_fan(75); // sets the fan speed to 75%
[INFO] [stdout] 10 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::ops::Try` is not implemented for `()`
[INFO] [stdout]    = note: required by `std::ops::Try::from_error`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0432.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/cam.rs - cam::Kraken (line 16)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "7b0dcbed698d3b44f8371f3a39c360b53cd629eb85e75da1a5ea5b59e19ba130", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b0dcbed698d3b44f8371f3a39c360b53cd629eb85e75da1a5ea5b59e19ba130", kill_on_drop: false }`
[INFO] [stdout] 7b0dcbed698d3b44f8371f3a39c360b53cd629eb85e75da1a5ea5b59e19ba130