[INFO] updating cached repository slakuh/shredder-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/slakuh/shredder-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/slakuh/shredder-rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/slakuh/shredder-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/slakuh/shredder-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/slakuh/shredder-rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/slakuh/shredder-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/slakuh/shredder-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f7fbe3157e023eb0f75a15af06997dbc1911e164
[INFO] sha for GitHub repo slakuh/shredder-rs: f7fbe3157e023eb0f75a15af06997dbc1911e164
[INFO] validating manifest of slakuh/shredder-rs 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 slakuh/shredder-rs 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 slakuh/shredder-rs
[INFO] finished frobbing slakuh/shredder-rs
[INFO] frobbed toml for slakuh/shredder-rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/slakuh/shredder-rs/Cargo.toml
[INFO] started frobbing slakuh/shredder-rs
[INFO] finished frobbing slakuh/shredder-rs
[INFO] frobbed toml for slakuh/shredder-rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/slakuh/shredder-rs/Cargo.toml
[INFO] crate slakuh/shredder-rs 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/slakuh/shredder-rs/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[INFO] the lockfile is outdated, regenerating it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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing slakuh/shredder-rs 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/slakuh/shredder-rs:/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] 01152e185c9eb1c4bf83b17487c5929abc415a8d8d65422537ea01995ca35df3
[INFO] running `"docker" "start" "-a" "01152e185c9eb1c4bf83b17487c5929abc415a8d8d65422537ea01995ca35df3"`
[INFO] [stderr]    Compiling shredder v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variant is never constructed: `Random`
[INFO] [stderr]   --> src/shredder.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Random,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Zeroes`
[INFO] [stderr]   --> src/shredder.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Zeroes, // 0
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.29s
[INFO] running `"docker" "inspect" "01152e185c9eb1c4bf83b17487c5929abc415a8d8d65422537ea01995ca35df3"`
[INFO] running `"docker" "rm" "-f" "01152e185c9eb1c4bf83b17487c5929abc415a8d8d65422537ea01995ca35df3"`
[INFO] [stdout] 01152e185c9eb1c4bf83b17487c5929abc415a8d8d65422537ea01995ca35df3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/slakuh/shredder-rs:/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] 70359944fe05ae6f641a75189430ab5e5374ef5e29d2c78276b183326f5a1cce
[INFO] running `"docker" "start" "-a" "70359944fe05ae6f641a75189430ab5e5374ef5e29d2c78276b183326f5a1cce"`
[INFO] [stderr]    Compiling shredder v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variant is never constructed: `Random`
[INFO] [stderr]   --> src/shredder.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Random,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Zeroes`
[INFO] [stderr]   --> src/shredder.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Zeroes, // 0
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `"docker" "inspect" "70359944fe05ae6f641a75189430ab5e5374ef5e29d2c78276b183326f5a1cce"`
[INFO] running `"docker" "rm" "-f" "70359944fe05ae6f641a75189430ab5e5374ef5e29d2c78276b183326f5a1cce"`
[INFO] [stdout] 70359944fe05ae6f641a75189430ab5e5374ef5e29d2c78276b183326f5a1cce
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/slakuh/shredder-rs:/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] 8e5e2337ca85587fdbdf358834c4631ef8f47edb6094929cd77856b398b6e52e
[INFO] running `"docker" "start" "-a" "8e5e2337ca85587fdbdf358834c4631ef8f47edb6094929cd77856b398b6e52e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/shredder-12c677c72bf3adca
[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" "8e5e2337ca85587fdbdf358834c4631ef8f47edb6094929cd77856b398b6e52e"`
[INFO] running `"docker" "rm" "-f" "8e5e2337ca85587fdbdf358834c4631ef8f47edb6094929cd77856b398b6e52e"`
[INFO] [stdout] 8e5e2337ca85587fdbdf358834c4631ef8f47edb6094929cd77856b398b6e52e