[INFO] updating cached repository slayerjain/cs4414-ps2
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/slayerjain/cs4414-ps2
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/slayerjain/cs4414-ps2" "work/ex/beta-1.38-1/sources/1.37.0/gh/slayerjain/cs4414-ps2"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/slayerjain/cs4414-ps2'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/slayerjain/cs4414-ps2" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/slayerjain/cs4414-ps2"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/slayerjain/cs4414-ps2'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 614533a90b9932c15597aab23e6c6fe64d6b7b3a
[INFO] sha for GitHub repo slayerjain/cs4414-ps2: 614533a90b9932c15597aab23e6c6fe64d6b7b3a
[INFO] validating manifest of slayerjain/cs4414-ps2 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 slayerjain/cs4414-ps2 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 slayerjain/cs4414-ps2
[INFO] finished frobbing slayerjain/cs4414-ps2
[INFO] frobbed toml for slayerjain/cs4414-ps2 written to work/ex/beta-1.38-1/sources/1.37.0/gh/slayerjain/cs4414-ps2/Cargo.toml
[INFO] started frobbing slayerjain/cs4414-ps2
[INFO] finished frobbing slayerjain/cs4414-ps2
[INFO] frobbed toml for slayerjain/cs4414-ps2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/slayerjain/cs4414-ps2/Cargo.toml
[INFO] crate slayerjain/cs4414-ps2 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] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/slayerjain/cs4414-ps2/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 slayerjain/cs4414-ps2 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/slayerjain/cs4414-ps2:/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] 8cdde7e6287fc0ab0fc1ca7dfbb1bb3c163e827c668d69cddd0d8914965bad95
[INFO] running `"docker" "start" "-a" "8cdde7e6287fc0ab0fc1ca7dfbb1bb3c163e827c668d69cddd0d8914965bad95"`
[INFO] [stderr]    Compiling ps2 v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut stdin = io::stdin();
[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 0.81s
[INFO] running `"docker" "inspect" "8cdde7e6287fc0ab0fc1ca7dfbb1bb3c163e827c668d69cddd0d8914965bad95"`
[INFO] running `"docker" "rm" "-f" "8cdde7e6287fc0ab0fc1ca7dfbb1bb3c163e827c668d69cddd0d8914965bad95"`
[INFO] [stdout] 8cdde7e6287fc0ab0fc1ca7dfbb1bb3c163e827c668d69cddd0d8914965bad95
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/slayerjain/cs4414-ps2:/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] 0ebe8b880e5989ec39b2ce8c50a0ecc8a8bf9748ecea8abcd0999328a8bf9a0f
[INFO] running `"docker" "start" "-a" "0ebe8b880e5989ec39b2ce8c50a0ecc8a8bf9748ecea8abcd0999328a8bf9a0f"`
[INFO] [stderr]    Compiling ps2 v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut stdin = io::stdin();
[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 0.51s
[INFO] running `"docker" "inspect" "0ebe8b880e5989ec39b2ce8c50a0ecc8a8bf9748ecea8abcd0999328a8bf9a0f"`
[INFO] running `"docker" "rm" "-f" "0ebe8b880e5989ec39b2ce8c50a0ecc8a8bf9748ecea8abcd0999328a8bf9a0f"`
[INFO] [stdout] 0ebe8b880e5989ec39b2ce8c50a0ecc8a8bf9748ecea8abcd0999328a8bf9a0f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/slayerjain/cs4414-ps2:/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] ee4e175082c2e86e84eb6a4829606c12043ee747aa3c1dd6cfbe08cf89f92740
[INFO] running `"docker" "start" "-a" "ee4e175082c2e86e84eb6a4829606c12043ee747aa3c1dd6cfbe08cf89f92740"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ps2-d4e02cad6114863a
[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" "ee4e175082c2e86e84eb6a4829606c12043ee747aa3c1dd6cfbe08cf89f92740"`
[INFO] running `"docker" "rm" "-f" "ee4e175082c2e86e84eb6a4829606c12043ee747aa3c1dd6cfbe08cf89f92740"`
[INFO] [stdout] ee4e175082c2e86e84eb6a4829606c12043ee747aa3c1dd6cfbe08cf89f92740