[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-1.38-1/sources/1.37.0/gh/mlen/ddcpoll"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mlen/ddcpoll'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mlen/ddcpoll" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mlen/ddcpoll"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mlen/ddcpoll 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 mlen/ddcpoll
[INFO] finished frobbing mlen/ddcpoll
[INFO] frobbed toml for mlen/ddcpoll written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mlen/ddcpoll against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 653b578871b1fc19db5fe8c0e77d9e00601bc275efba21c8b9e19eb759980b25
[INFO] running `"docker" "start" "-a" "653b578871b1fc19db5fe8c0e77d9e00601bc275efba21c8b9e19eb759980b25"`
[INFO] [stderr]    Compiling uninitialized v0.0.2
[INFO] [stderr]    Compiling ddc-hi v0.1.3
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling serde v1.0.76
[INFO] [stderr]    Compiling mccs v0.1.0
[INFO] [stderr]    Compiling i2c v0.1.0
[INFO] [stderr]    Compiling i2c-linux-sys v0.2.0
[INFO] [stderr]    Compiling edid v0.2.0
[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 mccs-caps v0.1.0
[INFO] [stderr]    Compiling udev v0.2.0
[INFO] [stderr]    Compiling i2c-linux v0.1.1
[INFO] [stderr]    Compiling ddc-i2c v0.2.1
[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 43.06s
[INFO] running `"docker" "inspect" "653b578871b1fc19db5fe8c0e77d9e00601bc275efba21c8b9e19eb759980b25"`
[INFO] running `"docker" "rm" "-f" "653b578871b1fc19db5fe8c0e77d9e00601bc275efba21c8b9e19eb759980b25"`
[INFO] [stdout] 653b578871b1fc19db5fe8c0e77d9e00601bc275efba21c8b9e19eb759980b25
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] cdf51888f7f7020f3152d064e6aed57274ca4940367c42ce15b15544a3718c3c
[INFO] running `"docker" "start" "-a" "cdf51888f7f7020f3152d064e6aed57274ca4940367c42ce15b15544a3718c3c"`
[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 1.40s
[INFO] running `"docker" "inspect" "cdf51888f7f7020f3152d064e6aed57274ca4940367c42ce15b15544a3718c3c"`
[INFO] running `"docker" "rm" "-f" "cdf51888f7f7020f3152d064e6aed57274ca4940367c42ce15b15544a3718c3c"`
[INFO] [stdout] cdf51888f7f7020f3152d064e6aed57274ca4940367c42ce15b15544a3718c3c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 8f7a9a5bedb33498a7ab5ee90cf767e12686fa1ec8c2f4c8c3ee836e52cc79b9
[INFO] running `"docker" "start" "-a" "8f7a9a5bedb33498a7ab5ee90cf767e12686fa1ec8c2f4c8c3ee836e52cc79b9"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ddcpoll-7e9f4979bde0e7bb
[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" "8f7a9a5bedb33498a7ab5ee90cf767e12686fa1ec8c2f4c8c3ee836e52cc79b9"`
[INFO] running `"docker" "rm" "-f" "8f7a9a5bedb33498a7ab5ee90cf767e12686fa1ec8c2f4c8c3ee836e52cc79b9"`
[INFO] [stdout] 8f7a9a5bedb33498a7ab5ee90cf767e12686fa1ec8c2f4c8c3ee836e52cc79b9