[INFO] updating cached repository Emerentius/TravisTest
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Emerentius/TravisTest
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Emerentius/TravisTest" "work/ex/beta-1.38-1/sources/1.37.0/gh/Emerentius/TravisTest"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Emerentius/TravisTest'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Emerentius/TravisTest" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Emerentius/TravisTest"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Emerentius/TravisTest'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0b89d95a282828c04f97a43a00eb48f62346db2e
[INFO] sha for GitHub repo Emerentius/TravisTest: 0b89d95a282828c04f97a43a00eb48f62346db2e
[INFO] validating manifest of Emerentius/TravisTest 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 Emerentius/TravisTest 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 Emerentius/TravisTest
[INFO] finished frobbing Emerentius/TravisTest
[INFO] frobbed toml for Emerentius/TravisTest written to work/ex/beta-1.38-1/sources/1.37.0/gh/Emerentius/TravisTest/Cargo.toml
[INFO] started frobbing Emerentius/TravisTest
[INFO] finished frobbing Emerentius/TravisTest
[INFO] frobbed toml for Emerentius/TravisTest written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Emerentius/TravisTest/Cargo.toml
[INFO] crate Emerentius/TravisTest 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] [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 Emerentius/TravisTest 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/Emerentius/TravisTest:/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] d38b3040860d3e4eede0c8d97f62944456dd50fbe8a955ed7dc0474f606bcea4
[INFO] running `"docker" "start" "-a" "d38b3040860d3e4eede0c8d97f62944456dd50fbe8a955ed7dc0474f606bcea4"`
[INFO] [stderr]    Compiling crunchy v0.2.1
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]    Compiling sudoku v0.7.0 (https://github.com/Emerentius/sudoku?rev=3bfba46840930f9f56fb380c9aac779c273bf55d#3bfba468)
[INFO] [stderr]    Compiling sudoku-cli v0.5.9 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:392:21
[INFO] [stderr]     |
[INFO] [stderr] 392 |                 let mut sudoku = match sudoku {
[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 20.82s
[INFO] running `"docker" "inspect" "d38b3040860d3e4eede0c8d97f62944456dd50fbe8a955ed7dc0474f606bcea4"`
[INFO] running `"docker" "rm" "-f" "d38b3040860d3e4eede0c8d97f62944456dd50fbe8a955ed7dc0474f606bcea4"`
[INFO] [stdout] d38b3040860d3e4eede0c8d97f62944456dd50fbe8a955ed7dc0474f606bcea4
[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/Emerentius/TravisTest:/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] 81c5fc88a8ce61ffe23db01def3c0f62fbf5a11db10106cf4e00e2f156f06a41
[INFO] running `"docker" "start" "-a" "81c5fc88a8ce61ffe23db01def3c0f62fbf5a11db10106cf4e00e2f156f06a41"`
[INFO] [stderr]    Compiling sudoku-cli v0.5.9 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:392:21
[INFO] [stderr]     |
[INFO] [stderr] 392 |                 let mut sudoku = match sudoku {
[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 0.75s
[INFO] running `"docker" "inspect" "81c5fc88a8ce61ffe23db01def3c0f62fbf5a11db10106cf4e00e2f156f06a41"`
[INFO] running `"docker" "rm" "-f" "81c5fc88a8ce61ffe23db01def3c0f62fbf5a11db10106cf4e00e2f156f06a41"`
[INFO] [stdout] 81c5fc88a8ce61ffe23db01def3c0f62fbf5a11db10106cf4e00e2f156f06a41
[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/Emerentius/TravisTest:/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] aee38466cde48404faacb41f7615545d38c0d5f10cab191a0594e5df8e93b4df
[INFO] running `"docker" "start" "-a" "aee38466cde48404faacb41f7615545d38c0d5f10cab191a0594e5df8e93b4df"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rudoku-2f131f2994269bb5
[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" "aee38466cde48404faacb41f7615545d38c0d5f10cab191a0594e5df8e93b4df"`
[INFO] running `"docker" "rm" "-f" "aee38466cde48404faacb41f7615545d38c0d5f10cab191a0594e5df8e93b4df"`
[INFO] [stdout] aee38466cde48404faacb41f7615545d38c0d5f10cab191a0594e5df8e93b4df