[INFO] crate mcp4725 0.1.2 is already in cache
[INFO] testing mcp4725-0.1.2 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate mcp4725 0.1.2 into work/builds/worker-7/source
[INFO] validating manifest of crates.io crate mcp4725 0.1.2 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mcp4725 0.1.2
[INFO] finished tweaking crates.io crate mcp4725 0.1.2
[INFO] tweaked toml for crates.io crate mcp4725 0.1.2 written to work/builds/worker-7/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 6c28e016367d191f3078d3543f60376481b789ab39b986b793f52ecd16604493
[INFO] running `"docker" "start" "-a" "6c28e016367d191f3078d3543f60376481b789ab39b986b793f52ecd16604493"`
[INFO] [stderr]    Compiling mcp4725 v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]   --> src/lib.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         self.i2c.write(command.address_byte, &command.bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]   --> src/lib.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |         self.i2c.write(command.address_byte, &command.bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `"docker" "inspect" "6c28e016367d191f3078d3543f60376481b789ab39b986b793f52ecd16604493"`
[INFO] running `"docker" "rm" "-f" "6c28e016367d191f3078d3543f60376481b789ab39b986b793f52ecd16604493"`
[INFO] [stdout] 6c28e016367d191f3078d3543f60376481b789ab39b986b793f52ecd16604493
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] f611dec67c20c83c84b2bfa827cd4ca1b229e3736e9e98df842a45585b6abe5e
[INFO] running `"docker" "start" "-a" "f611dec67c20c83c84b2bfa827cd4ca1b229e3736e9e98df842a45585b6abe5e"`
[INFO] [stderr]    Compiling mcp4725 v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]   --> src/lib.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         self.i2c.write(command.address_byte, &command.bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]   --> src/lib.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |         self.i2c.write(command.address_byte, &command.bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `"docker" "inspect" "f611dec67c20c83c84b2bfa827cd4ca1b229e3736e9e98df842a45585b6abe5e"`
[INFO] running `"docker" "rm" "-f" "f611dec67c20c83c84b2bfa827cd4ca1b229e3736e9e98df842a45585b6abe5e"`
[INFO] [stdout] f611dec67c20c83c84b2bfa827cd4ca1b229e3736e9e98df842a45585b6abe5e
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] 96c9fcf332f7349aae4486424e16c04d9e7bebe7dd4d18b9fec749994c556a43
[INFO] running `"docker" "start" "-a" "96c9fcf332f7349aae4486424e16c04d9e7bebe7dd4d18b9fec749994c556a43"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/mcp4725-56ebf34371bbcaca
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test test_command::should_encode_address_with_device_id ... ok
[INFO] [stdout] test test_command::should_encode_data_into_data_bytes ... ok
[INFO] [stdout] test test_command::should_encode_command_into_data_bytes ... ok
[INFO] [stdout] test test_command::should_ignore_adresses_with_more_than_3_bits ... ok
[INFO] [stdout] test test_fast_command::should_encode_address_with_device_id ... ok
[INFO] [stdout] test test_fast_command::should_encode_powermode_into_data_bytes ... ok
[INFO] [stdout] test test_fast_command::should_encode_data_into_data_bytes ... ok
[INFO] [stdout] test test_command::should_encode_power_mode_into_data_bytes ... ok
[INFO] [stdout] test test_fast_command::should_ignore_adresses_with_more_than_3_bits ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mcp4725
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs -  (line 11) ... ignored
[INFO] [stdout] test src/lib.rs -  (line 18) ... ignored
[INFO] [stdout] test src/lib.rs -  (line 25) ... ignored
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 3 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "96c9fcf332f7349aae4486424e16c04d9e7bebe7dd4d18b9fec749994c556a43"`
[INFO] running `"docker" "rm" "-f" "96c9fcf332f7349aae4486424e16c04d9e7bebe7dd4d18b9fec749994c556a43"`
[INFO] [stdout] 96c9fcf332f7349aae4486424e16c04d9e7bebe7dd4d18b9fec749994c556a43