[INFO] fetching crate lc709203 0.2.1...
[INFO] testing lc709203-0.2.1 against 1.75.0 for beta-1.76-1
[INFO] extracting crate lc709203 0.2.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate lc709203 0.2.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lc709203 0.2.1
[INFO] finished tweaking crates.io crate lc709203 0.2.1
[INFO] tweaked toml for crates.io crate lc709203 0.2.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8702f58c9825cfb6a3056478c2e51ac39037b89f9b68f8dc25db77a3f87932c
[INFO] running `Command { std: "docker" "start" "-a" "d8702f58c9825cfb6a3056478c2e51ac39037b89f9b68f8dc25db77a3f87932c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8702f58c9825cfb6a3056478c2e51ac39037b89f9b68f8dc25db77a3f87932c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8702f58c9825cfb6a3056478c2e51ac39037b89f9b68f8dc25db77a3f87932c", kill_on_drop: false }`
[INFO] [stdout] d8702f58c9825cfb6a3056478c2e51ac39037b89f9b68f8dc25db77a3f87932c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f036d7d22dcc93130c1fc231aace7b3a809854c8f2ab294c14df3222e31c2ac6
[INFO] running `Command { std: "docker" "start" "-a" "f036d7d22dcc93130c1fc231aace7b3a809854c8f2ab294c14df3222e31c2ac6", kill_on_drop: false }`
[INFO] [stderr]    Compiling nb v1.1.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stderr]    Compiling lc709203 v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "f036d7d22dcc93130c1fc231aace7b3a809854c8f2ab294c14df3222e31c2ac6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f036d7d22dcc93130c1fc231aace7b3a809854c8f2ab294c14df3222e31c2ac6", kill_on_drop: false }`
[INFO] [stdout] f036d7d22dcc93130c1fc231aace7b3a809854c8f2ab294c14df3222e31c2ac6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a83255218e0ed6a125a5f25d213b5ec2cd706a851c9a95593030973bf364d62b
[INFO] running `Command { std: "docker" "start" "-a" "a83255218e0ed6a125a5f25d213b5ec2cd706a851c9a95593030973bf364d62b", kill_on_drop: false }`
[INFO] [stderr]    Compiling lc709203 v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "a83255218e0ed6a125a5f25d213b5ec2cd706a851c9a95593030973bf364d62b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a83255218e0ed6a125a5f25d213b5ec2cd706a851c9a95593030973bf364d62b", kill_on_drop: false }`
[INFO] [stdout] a83255218e0ed6a125a5f25d213b5ec2cd706a851c9a95593030973bf364d62b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e4ddee3a78fc79e8cdebcdd05821fe6dffddf2cffca2cb7fb7c259f5abdbe09c
[INFO] running `Command { std: "docker" "start" "-a" "e4ddee3a78fc79e8cdebcdd05821fe6dffddf2cffca2cb7fb7c259f5abdbe09c", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/lc709203-a3529b5a7ea9f411)
[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 lc709203
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] [stdout] test src/lib.rs - (line 7) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 7) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `I2C`
[INFO] [stdout]  --> src/lib.rs:11:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | let i2c = I2C::new();
[INFO] [stdout]   |           ^^^ use of undeclared type `I2C`
[INFO] [stdout]   |
[INFO] [stdout] help: there is an enum variant `lc709203::TemperatureMode::I2C`; try using the variant's enum
[INFO] [stdout]   |
[INFO] [stdout] 7 | let i2c = lc709203::TemperatureMode();
[INFO] [stdout]   |           ~~~~~~~~~~~~~~~~~~~~~~~~~
[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:16:21
[INFO] [stdout]    |
[INFO] [stdout] 6  | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_7_0() {
[INFO] [stdout]    |                                      --------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 12 |     .build(&mut i2c)?; // initialize the lc709203 chip
[INFO] [stdout]    |                     ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Result<Infallible, BuildError<_>>>` is not implemented for `()`
[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:17:56
[INFO] [stdout]    |
[INFO] [stdout] 6  | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_7_0() {
[INFO] [stdout]    |                                      --------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 13 | let battery_voltage = lc709203.cell_voltage_v(&mut i2c)?; // query current battery voltage
[INFO] [stdout]    |                                                        ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Result<Infallible, ChipError<_>>>` is not implemented for `()`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0433.
[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/lib.rs - (line 7)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.07s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e4ddee3a78fc79e8cdebcdd05821fe6dffddf2cffca2cb7fb7c259f5abdbe09c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4ddee3a78fc79e8cdebcdd05821fe6dffddf2cffca2cb7fb7c259f5abdbe09c", kill_on_drop: false }`
[INFO] [stdout] e4ddee3a78fc79e8cdebcdd05821fe6dffddf2cffca2cb7fb7c259f5abdbe09c
