[INFO] updating cached repository PicoJr/2019-hashcode-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/PicoJr/2019-hashcode-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/PicoJr/2019-hashcode-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/PicoJr/2019-hashcode-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/PicoJr/2019-hashcode-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/PicoJr/2019-hashcode-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/PicoJr/2019-hashcode-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/PicoJr/2019-hashcode-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 73ebd65058f489aae43bfd2352bd0200b2233c30
[INFO] sha for GitHub repo PicoJr/2019-hashcode-rust: 73ebd65058f489aae43bfd2352bd0200b2233c30
[INFO] validating manifest of PicoJr/2019-hashcode-rust 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 PicoJr/2019-hashcode-rust 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 PicoJr/2019-hashcode-rust
[INFO] finished frobbing PicoJr/2019-hashcode-rust
[INFO] frobbed toml for PicoJr/2019-hashcode-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/PicoJr/2019-hashcode-rust/Cargo.toml
[INFO] started frobbing PicoJr/2019-hashcode-rust
[INFO] finished frobbing PicoJr/2019-hashcode-rust
[INFO] frobbed toml for PicoJr/2019-hashcode-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/PicoJr/2019-hashcode-rust/Cargo.toml
[INFO] crate PicoJr/2019-hashcode-rust 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 PicoJr/2019-hashcode-rust 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-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/PicoJr/2019-hashcode-rust:/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] fc612e8c63630e8d4bad94989ca17c9cff4cc0bcb730f714cb8c154fd2759c9b
[INFO] running `"docker" "start" "-a" "fc612e8c63630e8d4bad94989ca17c9cff4cc0bcb730f714cb8c154fd2759c9b"`
[INFO] [stderr]    Compiling syn v0.15.28
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling structopt-derive v0.2.15
[INFO] [stderr]    Compiling structopt v0.2.15
[INFO] [stderr]    Compiling hashcode2019 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:244:9
[INFO] [stderr]     |
[INFO] [stderr] 244 |     let mut first_h: Image;
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:245:9
[INFO] [stderr]     |
[INFO] [stderr] 245 |     let mut first_v: Image;
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:246:9
[INFO] [stderr]     |
[INFO] [stderr] 246 |     let mut first_other_v: Image;
[INFO] [stderr]     |         ----^^^^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.39s
[INFO] running `"docker" "inspect" "fc612e8c63630e8d4bad94989ca17c9cff4cc0bcb730f714cb8c154fd2759c9b"`
[INFO] running `"docker" "rm" "-f" "fc612e8c63630e8d4bad94989ca17c9cff4cc0bcb730f714cb8c154fd2759c9b"`
[INFO] [stdout] fc612e8c63630e8d4bad94989ca17c9cff4cc0bcb730f714cb8c154fd2759c9b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/PicoJr/2019-hashcode-rust:/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] 67508d7af8a8b5d9336bd66f3286ae076c105b7cbf9d017bdd1730ed2e9e9acd
[INFO] running `"docker" "start" "-a" "67508d7af8a8b5d9336bd66f3286ae076c105b7cbf9d017bdd1730ed2e9e9acd"`
[INFO] [stderr]    Compiling hashcode2019 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:244:9
[INFO] [stderr]     |
[INFO] [stderr] 244 |     let mut first_h: Image;
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:245:9
[INFO] [stderr]     |
[INFO] [stderr] 245 |     let mut first_v: Image;
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:246:9
[INFO] [stderr]     |
[INFO] [stderr] 246 |     let mut first_other_v: Image;
[INFO] [stderr]     |         ----^^^^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.57s
[INFO] running `"docker" "inspect" "67508d7af8a8b5d9336bd66f3286ae076c105b7cbf9d017bdd1730ed2e9e9acd"`
[INFO] running `"docker" "rm" "-f" "67508d7af8a8b5d9336bd66f3286ae076c105b7cbf9d017bdd1730ed2e9e9acd"`
[INFO] [stdout] 67508d7af8a8b5d9336bd66f3286ae076c105b7cbf9d017bdd1730ed2e9e9acd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/PicoJr/2019-hashcode-rust:/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] 2b817bc6042a2595f9aa41141446a716bf1995242d57c103bbc26cdd8e5f6e42
[INFO] running `"docker" "start" "-a" "2b817bc6042a2595f9aa41141446a716bf1995242d57c103bbc26cdd8e5f6e42"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hashcode2019-a115d1ef2144b436
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_score ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hashcode2019-d65d6d91c6113c6e
[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 hashcode2019
[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" "2b817bc6042a2595f9aa41141446a716bf1995242d57c103bbc26cdd8e5f6e42"`
[INFO] running `"docker" "rm" "-f" "2b817bc6042a2595f9aa41141446a716bf1995242d57c103bbc26cdd8e5f6e42"`
[INFO] [stdout] 2b817bc6042a2595f9aa41141446a716bf1995242d57c103bbc26cdd8e5f6e42