[INFO] crate i2cdev 0.4.2 is already in cache
[INFO] extracting crate i2cdev 0.4.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/i2cdev/0.4.2
[INFO] extracting crate i2cdev 0.4.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/i2cdev/0.4.2
[INFO] validating manifest of i2cdev-0.4.2 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of i2cdev-0.4.2 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing i2cdev-0.4.2
[INFO] finished frobbing i2cdev-0.4.2
[INFO] frobbed toml for i2cdev-0.4.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/i2cdev/0.4.2/Cargo.toml
[INFO] started frobbing i2cdev-0.4.2
[INFO] finished frobbing i2cdev-0.4.2
[INFO] frobbed toml for i2cdev-0.4.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/i2cdev/0.4.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing i2cdev-0.4.2 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/i2cdev/0.4.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 5963964fc7af722a6ca69492fe7415774bbc8dfc7e5393b5aff7f93f5956ea0e
[INFO] running `"docker" "start" "-a" "5963964fc7af722a6ca69492fe7415774bbc8dfc7e5393b5aff7f93f5956ea0e"`
[INFO] [stderr]    Compiling i2cdev v0.4.2 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/linux.rs:77:32
[INFO] [stderr]    |
[INFO] [stderr] 77 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `"docker" "inspect" "5963964fc7af722a6ca69492fe7415774bbc8dfc7e5393b5aff7f93f5956ea0e"`
[INFO] running `"docker" "rm" "-f" "5963964fc7af722a6ca69492fe7415774bbc8dfc7e5393b5aff7f93f5956ea0e"`
[INFO] [stdout] 5963964fc7af722a6ca69492fe7415774bbc8dfc7e5393b5aff7f93f5956ea0e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/i2cdev/0.4.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0b20d42f0361d568755be673cc27e4d9fa377221f367bff4292e3646c4966f54
[INFO] running `"docker" "start" "-a" "0b20d42f0361d568755be673cc27e4d9fa377221f367bff4292e3646c4966f54"`
[INFO] [stderr]    Compiling i2cdev v0.4.2 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/linux.rs:77:32
[INFO] [stderr]    |
[INFO] [stderr] 77 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> examples/sensors.rs:304:30
[INFO] [stderr]     |
[INFO] [stderr] 304 |                 i2cdev: &mut I2CDevice<Error = E>,
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn I2CDevice<Error = E>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> examples/sensors.rs:321:30
[INFO] [stderr]     |
[INFO] [stderr] 321 |                 i2cdev: &mut I2CDevice<Error = E>,
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn I2CDevice<Error = E>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> examples/nunchuck.rs:56:36
[INFO] [stderr]    |
[INFO] [stderr] 56 |         fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                    ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.02s
[INFO] running `"docker" "inspect" "0b20d42f0361d568755be673cc27e4d9fa377221f367bff4292e3646c4966f54"`
[INFO] running `"docker" "rm" "-f" "0b20d42f0361d568755be673cc27e4d9fa377221f367bff4292e3646c4966f54"`
[INFO] [stdout] 0b20d42f0361d568755be673cc27e4d9fa377221f367bff4292e3646c4966f54
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/i2cdev/0.4.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] c2a223bb86f4f6da439b6fa35d4eaa0912eb837b95445cd9e41fc7a32f9a3beb
[INFO] running `"docker" "start" "-a" "c2a223bb86f4f6da439b6fa35d4eaa0912eb837b95445cd9e41fc7a32f9a3beb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/i2cdev-0aaea7bab8564509
[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
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests i2cdev
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 15) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "c2a223bb86f4f6da439b6fa35d4eaa0912eb837b95445cd9e41fc7a32f9a3beb"`
[INFO] running `"docker" "rm" "-f" "c2a223bb86f4f6da439b6fa35d4eaa0912eb837b95445cd9e41fc7a32f9a3beb"`
[INFO] [stdout] c2a223bb86f4f6da439b6fa35d4eaa0912eb837b95445cd9e41fc7a32f9a3beb