[INFO] updating cached repository mlen/ddcpoll
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mlen/ddcpoll
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mlen/ddcpoll" "work/ex/beta-1.37-6/sources/1.36.0/gh/mlen/ddcpoll"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/mlen/ddcpoll'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mlen/ddcpoll" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mlen/ddcpoll"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mlen/ddcpoll'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 683041f79b2ff6836ef226d2c5317575f2eb5620
[INFO] sha for GitHub repo mlen/ddcpoll: 683041f79b2ff6836ef226d2c5317575f2eb5620
[INFO] validating manifest of mlen/ddcpoll on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mlen/ddcpoll on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mlen/ddcpoll
[INFO] finished frobbing mlen/ddcpoll
[INFO] frobbed toml for mlen/ddcpoll written to work/ex/beta-1.37-6/sources/1.36.0/gh/mlen/ddcpoll/Cargo.toml
[INFO] started frobbing mlen/ddcpoll
[INFO] finished frobbing mlen/ddcpoll
[INFO] frobbed toml for mlen/ddcpoll written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mlen/ddcpoll/Cargo.toml
[INFO] crate mlen/ddcpoll already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mlen/ddcpoll against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mlen/ddcpoll:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 2968f867c41687d458ccd714d244173a513e7f9b7d1f2e984b7fa40880505636
[INFO] running `"docker" "start" "-a" "2968f867c41687d458ccd714d244173a513e7f9b7d1f2e984b7fa40880505636"`
[INFO] [stderr]    Compiling uninitialized v0.0.2
[INFO] [stderr]    Compiling serde v1.0.76
[INFO] [stderr]    Compiling ddc-hi v0.1.3
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling i2c v0.1.0
[INFO] [stderr]    Compiling mccs v0.1.0
[INFO] [stderr]    Compiling i2c-linux-sys v0.2.0
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling backtrace v0.3.8
[INFO] [stderr]    Compiling serde_derive v1.0.76
[INFO] [stderr]    Compiling resize-slice v0.1.3
[INFO] [stderr]    Compiling ddc v0.2.1
[INFO] [stderr]    Compiling udev v0.2.0
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling i2c-linux v0.1.1
[INFO] [stderr]    Compiling ddc-i2c v0.2.1
[INFO] [stderr]    Compiling edid v0.2.0
[INFO] [stderr]    Compiling mccs-caps v0.1.0
[INFO] [stderr]    Compiling serde_yaml v0.7.5
[INFO] [stderr]    Compiling toml v0.4.6
[INFO] [stderr]    Compiling mccs-db v0.1.2
[INFO] [stderr]    Compiling ddcpoll v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:78:13
[INFO] [stderr]    |
[INFO] [stderr] 78 |         for mut display in &mut self.displays {
[INFO] [stderr]    |             ----^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 43.92s
[INFO] running `"docker" "inspect" "2968f867c41687d458ccd714d244173a513e7f9b7d1f2e984b7fa40880505636"`
[INFO] running `"docker" "rm" "-f" "2968f867c41687d458ccd714d244173a513e7f9b7d1f2e984b7fa40880505636"`
[INFO] [stdout] 2968f867c41687d458ccd714d244173a513e7f9b7d1f2e984b7fa40880505636
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mlen/ddcpoll:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] c846a1a6a610e1a6c3f63ecbeb019c23b7d29a5f7a28364c413e3d7d4cc34a8a
[INFO] running `"docker" "start" "-a" "c846a1a6a610e1a6c3f63ecbeb019c23b7d29a5f7a28364c413e3d7d4cc34a8a"`
[INFO] [stderr]    Compiling ddcpoll v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:78:13
[INFO] [stderr]    |
[INFO] [stderr] 78 |         for mut display in &mut self.displays {
[INFO] [stderr]    |             ----^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
[INFO] running `"docker" "inspect" "c846a1a6a610e1a6c3f63ecbeb019c23b7d29a5f7a28364c413e3d7d4cc34a8a"`
[INFO] running `"docker" "rm" "-f" "c846a1a6a610e1a6c3f63ecbeb019c23b7d29a5f7a28364c413e3d7d4cc34a8a"`
[INFO] [stdout] c846a1a6a610e1a6c3f63ecbeb019c23b7d29a5f7a28364c413e3d7d4cc34a8a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mlen/ddcpoll:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] d047d7e295e0a5e03590c3057be94ead3127c6a0a2337cd5dd68a08807422543
[INFO] running `"docker" "start" "-a" "d047d7e295e0a5e03590c3057be94ead3127c6a0a2337cd5dd68a08807422543"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ddcpoll-5999dadf226220f0
[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] running `"docker" "inspect" "d047d7e295e0a5e03590c3057be94ead3127c6a0a2337cd5dd68a08807422543"`
[INFO] running `"docker" "rm" "-f" "d047d7e295e0a5e03590c3057be94ead3127c6a0a2337cd5dd68a08807422543"`
[INFO] [stdout] d047d7e295e0a5e03590c3057be94ead3127c6a0a2337cd5dd68a08807422543