[INFO] updating cached repository lreynolds18/AOC
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lreynolds18/AOC
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lreynolds18/AOC" "work/ex/beta-1.38-1/sources/1.37.0/gh/lreynolds18/AOC"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/lreynolds18/AOC'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lreynolds18/AOC" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lreynolds18/AOC"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lreynolds18/AOC'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 441e7b46e56d9b506c2bd51c0c5848efb457d2fe
[INFO] sha for GitHub repo lreynolds18/AOC: 441e7b46e56d9b506c2bd51c0c5848efb457d2fe
[INFO] validating manifest of lreynolds18/AOC 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 lreynolds18/AOC 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 lreynolds18/AOC
[INFO] finished frobbing lreynolds18/AOC
[INFO] frobbed toml for lreynolds18/AOC written to work/ex/beta-1.38-1/sources/1.37.0/gh/lreynolds18/AOC/Cargo.toml
[INFO] started frobbing lreynolds18/AOC
[INFO] finished frobbing lreynolds18/AOC
[INFO] frobbed toml for lreynolds18/AOC written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lreynolds18/AOC/Cargo.toml
[INFO] crate lreynolds18/AOC 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 lreynolds18/AOC 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/lreynolds18/AOC:/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] 3d313eba2aa03902e2eeed9fb9a0bd6c73f6c9a590d4948790a8a0b3c7d09317
[INFO] running `"docker" "start" "-a" "3d313eba2aa03902e2eeed9fb9a0bd6c73f6c9a590d4948790a8a0b3c7d09317"`
[INFO] [stderr]    Compiling aoc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/code/helper.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |     let mut id: i32 = split_by_whitespace[0]
[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/code/day02.rs:48:13
[INFO] [stderr]    |
[INFO] [stderr] 48 |         let mut diff = difference_between_two_strings(&line1, &line2);
[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/code/day05.rs:6:7
[INFO] [stderr]   |
[INFO] [stderr] 6 |   let mut v: Vec<char> = file_to_string(path).unwrap().chars().collect();
[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/code/day05.rs:26:7
[INFO] [stderr]    |
[INFO] [stderr] 26 |   let mut v: Vec<char> = file_to_string(path).unwrap().chars().collect();
[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" "3d313eba2aa03902e2eeed9fb9a0bd6c73f6c9a590d4948790a8a0b3c7d09317"`
[INFO] running `"docker" "rm" "-f" "3d313eba2aa03902e2eeed9fb9a0bd6c73f6c9a590d4948790a8a0b3c7d09317"`
[INFO] [stdout] 3d313eba2aa03902e2eeed9fb9a0bd6c73f6c9a590d4948790a8a0b3c7d09317
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/lreynolds18/AOC:/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] da170302fbb605c341f2866995a88c5b0c346a7a34f3a7b4bb939ba679880709
[INFO] running `"docker" "start" "-a" "da170302fbb605c341f2866995a88c5b0c346a7a34f3a7b4bb939ba679880709"`
[INFO] [stderr]    Compiling aoc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/code/helper.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |     let mut id: i32 = split_by_whitespace[0]
[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/code/day02.rs:48:13
[INFO] [stderr]    |
[INFO] [stderr] 48 |         let mut diff = difference_between_two_strings(&line1, &line2);
[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/code/day05.rs:6:7
[INFO] [stderr]   |
[INFO] [stderr] 6 |   let mut v: Vec<char> = file_to_string(path).unwrap().chars().collect();
[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/code/day05.rs:26:7
[INFO] [stderr]    |
[INFO] [stderr] 26 |   let mut v: Vec<char> = file_to_string(path).unwrap().chars().collect();
[INFO] [stderr]    |       ----^
[INFO] [stderr]    |       |
[INFO] [stderr]    |       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `"docker" "inspect" "da170302fbb605c341f2866995a88c5b0c346a7a34f3a7b4bb939ba679880709"`
[INFO] running `"docker" "rm" "-f" "da170302fbb605c341f2866995a88c5b0c346a7a34f3a7b4bb939ba679880709"`
[INFO] [stdout] da170302fbb605c341f2866995a88c5b0c346a7a34f3a7b4bb939ba679880709
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/lreynolds18/AOC:/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] 47753a4822b314c67267567e0f0b30aaad1936ea39fd6d02fc60bea57079fcf2
[INFO] running `"docker" "start" "-a" "47753a4822b314c67267567e0f0b30aaad1936ea39fd6d02fc60bea57079fcf2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/aoc-d2eaa3d6c8eb068f
[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" "47753a4822b314c67267567e0f0b30aaad1936ea39fd6d02fc60bea57079fcf2"`
[INFO] running `"docker" "rm" "-f" "47753a4822b314c67267567e0f0b30aaad1936ea39fd6d02fc60bea57079fcf2"`
[INFO] [stdout] 47753a4822b314c67267567e0f0b30aaad1936ea39fd6d02fc60bea57079fcf2