[INFO] crate mcp4725 0.1.2 is already in cache
[INFO] testing mcp4725-0.1.2 against 1.38.0 for beta-1.39-1
[INFO] extracting crate mcp4725 0.1.2 into work/builds/worker-0/source
[INFO] validating manifest of crates.io crate mcp4725 0.1.2 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "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-0/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] f41e9f03c83854044dbd12c204d0a229ed8397dada48db767d8606acd20a9df1
[INFO] running `"docker" "start" "-a" "f41e9f03c83854044dbd12c204d0a229ed8397dada48db767d8606acd20a9df1"`
[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 0.21s
[INFO] running `"docker" "inspect" "f41e9f03c83854044dbd12c204d0a229ed8397dada48db767d8606acd20a9df1"`
[INFO] running `"docker" "rm" "-f" "f41e9f03c83854044dbd12c204d0a229ed8397dada48db767d8606acd20a9df1"`
[INFO] [stdout] f41e9f03c83854044dbd12c204d0a229ed8397dada48db767d8606acd20a9df1
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/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" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] bd3aaa499c82e0c723c1f1e352b51c1ecf50ddbf10abad825a5c9dd727230d19
[INFO] running `"docker" "start" "-a" "bd3aaa499c82e0c723c1f1e352b51c1ecf50ddbf10abad825a5c9dd727230d19"`
[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 0.39s
[INFO] running `"docker" "inspect" "bd3aaa499c82e0c723c1f1e352b51c1ecf50ddbf10abad825a5c9dd727230d19"`
[INFO] running `"docker" "rm" "-f" "bd3aaa499c82e0c723c1f1e352b51c1ecf50ddbf10abad825a5c9dd727230d19"`
[INFO] [stdout] bd3aaa499c82e0c723c1f1e352b51c1ecf50ddbf10abad825a5c9dd727230d19
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/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" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] ec9c543a55b688cee1efdeba31c1d95adb4a592b0c67b97f3a2480c0658a46bf
[INFO] running `"docker" "start" "-a" "ec9c543a55b688cee1efdeba31c1d95adb4a592b0c67b97f3a2480c0658a46bf"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/mcp4725-c35839fa868a54fc
[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_command_into_data_bytes ... ok
[INFO] [stdout] test test_command::should_encode_data_into_data_bytes ... ok
[INFO] [stdout] test test_command::should_ignore_adresses_with_more_than_3_bits ... ok
[INFO] [stdout] test test_command::should_encode_power_mode_into_data_bytes ... ok
[INFO] [stdout] test test_fast_command::should_encode_address_with_device_id ... ok
[INFO] [stdout] test test_fast_command::should_encode_data_into_data_bytes ... ok
[INFO] [stdout] test test_fast_command::should_ignore_adresses_with_more_than_3_bits ... ok
[INFO] [stdout] test test_fast_command::should_encode_powermode_into_data_bytes ... 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" "ec9c543a55b688cee1efdeba31c1d95adb4a592b0c67b97f3a2480c0658a46bf"`
[INFO] running `"docker" "rm" "-f" "ec9c543a55b688cee1efdeba31c1d95adb4a592b0c67b97f3a2480c0658a46bf"`
[INFO] [stdout] ec9c543a55b688cee1efdeba31c1d95adb4a592b0c67b97f3a2480c0658a46bf