[INFO] fetching crate st7032i 0.0.4...
[INFO] testing st7032i-0.0.4 against 1.54.0 for beta-1.55-1
[INFO] extracting crate st7032i 0.0.4 into /workspace/builds/worker-78/source
[INFO] validating manifest of crates.io crate st7032i 0.0.4 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 st7032i 0.0.4
[INFO] finished tweaking crates.io crate st7032i 0.0.4
[INFO] tweaked toml for crates.io crate st7032i 0.0.4 written to /workspace/builds/worker-78/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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] 57a208b86b00f5e93901f18a27732dae9d138b63a7a0d7d8ea53dc5b4ead6e12
[INFO] running `Command { std: "docker" "start" "-a" "57a208b86b00f5e93901f18a27732dae9d138b63a7a0d7d8ea53dc5b4ead6e12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57a208b86b00f5e93901f18a27732dae9d138b63a7a0d7d8ea53dc5b4ead6e12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57a208b86b00f5e93901f18a27732dae9d138b63a7a0d7d8ea53dc5b4ead6e12", kill_on_drop: false }`
[INFO] [stdout] 57a208b86b00f5e93901f18a27732dae9d138b63a7a0d7d8ea53dc5b4ead6e12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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] 03e5a037558453b30f26ea7ef43950d905773af161b2d12e6cf0e9695196562e
[INFO] running `Command { std: "docker" "start" "-a" "03e5a037558453b30f26ea7ef43950d905773af161b2d12e6cf0e9695196562e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling embedded-hal v0.2.6
[INFO] [stderr]    Compiling st7032i v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.25s
[INFO] running `Command { std: "docker" "inspect" "03e5a037558453b30f26ea7ef43950d905773af161b2d12e6cf0e9695196562e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03e5a037558453b30f26ea7ef43950d905773af161b2d12e6cf0e9695196562e", kill_on_drop: false }`
[INFO] [stdout] 03e5a037558453b30f26ea7ef43950d905773af161b2d12e6cf0e9695196562e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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] 814e66b88c4b7e4fcd104526a1ab3c1b00a6ec61778354aab04ad419df1929f0
[INFO] running `Command { std: "docker" "start" "-a" "814e66b88c4b7e4fcd104526a1ab3c1b00a6ec61778354aab04ad419df1929f0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling bitflags v0.4.0
[INFO] [stderr]    Compiling bitflags v0.3.3
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling nix v0.6.0
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]    Compiling spidev v0.3.0
[INFO] [stderr]    Compiling sysfs_gpio v0.5.4
[INFO] [stderr]    Compiling i2cdev v0.4.4
[INFO] [stderr]    Compiling linux-embedded-hal v0.2.2
[INFO] [stderr]    Compiling st7032i v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 7.05s
[INFO] running `Command { std: "docker" "inspect" "814e66b88c4b7e4fcd104526a1ab3c1b00a6ec61778354aab04ad419df1929f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "814e66b88c4b7e4fcd104526a1ab3c1b00a6ec61778354aab04ad419df1929f0", kill_on_drop: false }`
[INFO] [stdout] 814e66b88c4b7e4fcd104526a1ab3c1b00a6ec61778354aab04ad419df1929f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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] feb6154f4c7c22b92c0b2476c80c96f47a06f20b42d661483c06c2080a2ce583
[INFO] running `Command { std: "docker" "start" "-a" "feb6154f4c7c22b92c0b2476c80c96f47a06f20b42d661483c06c2080a2ce583", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.82s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/st7032i-4f80ec2cecd921e0)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests st7032i
[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 2 tests
[INFO] [stdout] test src/lib.rs - (line 23) - compile ... FAILED
[INFO] [stdout] test src/lib.rs - (line 16) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 23) 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/lib.rs:29:36
[INFO] [stdout]    |
[INFO] [stdout] 7  | / fn main() {
[INFO] [stdout] 8  | | let dev = I2cdev::new("/dev/i2c-1")?;
[INFO] [stdout]    | |                                    ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 9  | | let mut display = ST7032i::new(dev, Delay, 2);
[INFO] [stdout] 10 | | display.init()?;
[INFO] [stdout] ...  |
[INFO] [stdout] 13 | | write!(display, "Rust")?;
[INFO] [stdout] 14 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Result<Infallible, LinuxI2CError>>` 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/lib.rs:31:15
[INFO] [stdout]    |
[INFO] [stdout] 7  | / fn main() {
[INFO] [stdout] 8  | | let dev = I2cdev::new("/dev/i2c-1")?;
[INFO] [stdout] 9  | | let mut display = ST7032i::new(dev, Delay, 2);
[INFO] [stdout] 10 | | display.init()?;
[INFO] [stdout]    | |               ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] ...  |
[INFO] [stdout] 13 | | write!(display, "Rust")?;
[INFO] [stdout] 14 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Result<Infallible, LinuxI2CError>>` 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/lib.rs:32:25
[INFO] [stdout]    |
[INFO] [stdout] 7  | / fn main() {
[INFO] [stdout] 8  | | let dev = I2cdev::new("/dev/i2c-1")?;
[INFO] [stdout] 9  | | let mut display = ST7032i::new(dev, Delay, 2);
[INFO] [stdout] 10 | | display.init()?;
[INFO] [stdout] 11 | | write!(display, "Hello")?;
[INFO] [stdout]    | |                         ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 12 | | display.move_cursor(1, 0)?;
[INFO] [stdout] 13 | | write!(display, "Rust")?;
[INFO] [stdout] 14 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Result<Infallible, std::fmt::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/lib.rs:33:26
[INFO] [stdout]    |
[INFO] [stdout] 7  | / fn main() {
[INFO] [stdout] 8  | | let dev = I2cdev::new("/dev/i2c-1")?;
[INFO] [stdout] 9  | | let mut display = ST7032i::new(dev, Delay, 2);
[INFO] [stdout] 10 | | display.init()?;
[INFO] [stdout] 11 | | write!(display, "Hello")?;
[INFO] [stdout] 12 | | display.move_cursor(1, 0)?;
[INFO] [stdout]    | |                          ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 13 | | write!(display, "Rust")?;
[INFO] [stdout] 14 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Result<Infallible, LinuxI2CError>>` 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/lib.rs:34:24
[INFO] [stdout]    |
[INFO] [stdout] 7  | / fn main() {
[INFO] [stdout] 8  | | let dev = I2cdev::new("/dev/i2c-1")?;
[INFO] [stdout] 9  | | let mut display = ST7032i::new(dev, Delay, 2);
[INFO] [stdout] 10 | | display.init()?;
[INFO] [stdout] ...  |
[INFO] [stdout] 13 | | write!(display, "Rust")?;
[INFO] [stdout]    | |                        ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 14 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Result<Infallible, std::fmt::Error>>` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 23)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.60s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "feb6154f4c7c22b92c0b2476c80c96f47a06f20b42d661483c06c2080a2ce583", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "feb6154f4c7c22b92c0b2476c80c96f47a06f20b42d661483c06c2080a2ce583", kill_on_drop: false }`
[INFO] [stdout] feb6154f4c7c22b92c0b2476c80c96f47a06f20b42d661483c06c2080a2ce583
