[INFO] fetching crate camctl_rs 0.1.2...
[INFO] testing camctl_rs-0.1.2 against 1.54.0 for beta-1.55-1
[INFO] extracting crate camctl_rs 0.1.2 into /workspace/builds/worker-105/source
[INFO] validating manifest of crates.io crate camctl_rs 0.1.2 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-105/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded usb-device v0.2.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-105/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-105/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a1f5c51086e6e12d1208bb4ae942f7574748b45a69cb5161dabf4f6ed233b170
[INFO] running `Command { std: "docker" "start" "-a" "a1f5c51086e6e12d1208bb4ae942f7574748b45a69cb5161dabf4f6ed233b170", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1f5c51086e6e12d1208bb4ae942f7574748b45a69cb5161dabf4f6ed233b170", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1f5c51086e6e12d1208bb4ae942f7574748b45a69cb5161dabf4f6ed233b170", kill_on_drop: false }`
[INFO] [stdout] a1f5c51086e6e12d1208bb4ae942f7574748b45a69cb5161dabf4f6ed233b170
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-105/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-105/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8327c7d778e03a457309641823a56ff386528492bfdc40830a295ff158576adc
[INFO] running `Command { std: "docker" "start" "-a" "8327c7d778e03a457309641823a56ff386528492bfdc40830a295ff158576adc", kill_on_drop: false }`
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling usb-device v0.2.8
[INFO] [stderr]    Compiling bit-set v0.2.0
[INFO] [stderr]    Compiling libusb-sys v0.2.3
[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 3.79s
[INFO] running `Command { std: "docker" "inspect" "8327c7d778e03a457309641823a56ff386528492bfdc40830a295ff158576adc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8327c7d778e03a457309641823a56ff386528492bfdc40830a295ff158576adc", kill_on_drop: false }`
[INFO] [stdout] 8327c7d778e03a457309641823a56ff386528492bfdc40830a295ff158576adc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-105/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-105/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 04a7f4b9bf5aa11f8bb732c9488977ffee43103d80871a43e2604ab4ebfc4151
[INFO] running `Command { std: "docker" "start" "-a" "04a7f4b9bf5aa11f8bb732c9488977ffee43103d80871a43e2604ab4ebfc4151", kill_on_drop: false }`
[INFO] [stderr]    Compiling camctl_rs v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "04a7f4b9bf5aa11f8bb732c9488977ffee43103d80871a43e2604ab4ebfc4151", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04a7f4b9bf5aa11f8bb732c9488977ffee43103d80871a43e2604ab4ebfc4151", kill_on_drop: false }`
[INFO] [stdout] 04a7f4b9bf5aa11f8bb732c9488977ffee43103d80871a43e2604ab4ebfc4151
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-105/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-105/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4c32171f72e13f50f30f767135c02d8a70be996f05cb04684267c8d994158d97
[INFO] running `Command { std: "docker" "start" "-a" "4c32171f72e13f50f30f767135c02d8a70be996f05cb04684267c8d994158d97", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/camctl_rs-0338c302b0dc6c00)
[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] [stderr]    Doc-tests camctl_rs
[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 `FromResidual`)
[INFO] [stdout]   --> src/cam.rs:19:33
[INFO] [stdout]    |
[INFO] [stdout] 3  |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_cam_rs_16_0() {
[INFO] [stdout]    |  ______________________________________-
[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 | | } _doctest_main_src_cam_rs_16_0() }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Result<Infallible, libusb::Error>>` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_residual`
[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 `FromResidual`)
[INFO] [stdout]   --> src/cam.rs:20:32
[INFO] [stdout]    |
[INFO] [stdout] 3  |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_cam_rs_16_0() {
[INFO] [stdout]    |  ______________________________________-
[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 | | } _doctest_main_src_cam_rs_16_0() }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<_>` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_residual`
[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; finished in 0.17s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "4c32171f72e13f50f30f767135c02d8a70be996f05cb04684267c8d994158d97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c32171f72e13f50f30f767135c02d8a70be996f05cb04684267c8d994158d97", kill_on_drop: false }`
[INFO] [stdout] 4c32171f72e13f50f30f767135c02d8a70be996f05cb04684267c8d994158d97
