[INFO] updating cached repository yzimhao/rust-gpwd
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/yzimhao/rust-gpwd
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/yzimhao/rust-gpwd" "work/ex/beta-1.38-1/sources/1.37.0/gh/yzimhao/rust-gpwd"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/yzimhao/rust-gpwd'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/yzimhao/rust-gpwd" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yzimhao/rust-gpwd"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yzimhao/rust-gpwd'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] eed5c5d866cc63ecb0f86371bbdaec16cb79b17f
[INFO] sha for GitHub repo yzimhao/rust-gpwd: eed5c5d866cc63ecb0f86371bbdaec16cb79b17f
[INFO] validating manifest of yzimhao/rust-gpwd 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 yzimhao/rust-gpwd 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 yzimhao/rust-gpwd
[INFO] finished frobbing yzimhao/rust-gpwd
[INFO] frobbed toml for yzimhao/rust-gpwd written to work/ex/beta-1.38-1/sources/1.37.0/gh/yzimhao/rust-gpwd/Cargo.toml
[INFO] started frobbing yzimhao/rust-gpwd
[INFO] finished frobbing yzimhao/rust-gpwd
[INFO] frobbed toml for yzimhao/rust-gpwd written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yzimhao/rust-gpwd/Cargo.toml
[INFO] crate yzimhao/rust-gpwd 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/yzimhao/rust-gpwd/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[INFO] the lockfile is outdated, regenerating it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 yzimhao/rust-gpwd 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/yzimhao/rust-gpwd:/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] 350f9fd0860c47f098ae50c10598ac0846a0aedcf545475972e634a182f6930f
[INFO] running `"docker" "start" "-a" "350f9fd0860c47f098ae50c10598ac0846a0aedcf545475972e634a182f6930f"`
[INFO] [stderr]    Compiling md5 v0.3.8
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling easy_strings v0.2.0
[INFO] [stderr]    Compiling gpwd v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |         let mut result = EZString::from(m3);
[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 2.93s
[INFO] running `"docker" "inspect" "350f9fd0860c47f098ae50c10598ac0846a0aedcf545475972e634a182f6930f"`
[INFO] running `"docker" "rm" "-f" "350f9fd0860c47f098ae50c10598ac0846a0aedcf545475972e634a182f6930f"`
[INFO] [stdout] 350f9fd0860c47f098ae50c10598ac0846a0aedcf545475972e634a182f6930f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/yzimhao/rust-gpwd:/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] 4d57dc986abfa87df23eaca4c1ca26fc75930dc4bd787c0156de70fbdf114f9f
[INFO] running `"docker" "start" "-a" "4d57dc986abfa87df23eaca4c1ca26fc75930dc4bd787c0156de70fbdf114f9f"`
[INFO] [stderr]    Compiling gpwd v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |         let mut result = EZString::from(m3);
[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 0.63s
[INFO] running `"docker" "inspect" "4d57dc986abfa87df23eaca4c1ca26fc75930dc4bd787c0156de70fbdf114f9f"`
[INFO] running `"docker" "rm" "-f" "4d57dc986abfa87df23eaca4c1ca26fc75930dc4bd787c0156de70fbdf114f9f"`
[INFO] [stdout] 4d57dc986abfa87df23eaca4c1ca26fc75930dc4bd787c0156de70fbdf114f9f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/yzimhao/rust-gpwd:/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] 286f33396d5f04fb9927b0d16887e507e48337ab99cec4fe8a16ce8e6b5ffa06
[INFO] running `"docker" "start" "-a" "286f33396d5f04fb9927b0d16887e507e48337ab99cec4fe8a16ce8e6b5ffa06"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/gpwd-687374e76cc41db4
[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" "286f33396d5f04fb9927b0d16887e507e48337ab99cec4fe8a16ce8e6b5ffa06"`
[INFO] running `"docker" "rm" "-f" "286f33396d5f04fb9927b0d16887e507e48337ab99cec4fe8a16ce8e6b5ffa06"`
[INFO] [stdout] 286f33396d5f04fb9927b0d16887e507e48337ab99cec4fe8a16ce8e6b5ffa06