[INFO] updating cached repository duckinator/chewy
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/duckinator/chewy
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/duckinator/chewy" "work/ex/beta-1.37-6/sources/1.36.0/gh/duckinator/chewy"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/duckinator/chewy'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/duckinator/chewy" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/duckinator/chewy"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/duckinator/chewy'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7b65b68222ab5d85da45be50176ef6bd95128e0c
[INFO] sha for GitHub repo duckinator/chewy: 7b65b68222ab5d85da45be50176ef6bd95128e0c
[INFO] validating manifest of duckinator/chewy on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of duckinator/chewy on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing duckinator/chewy
[INFO] finished frobbing duckinator/chewy
[INFO] frobbed toml for duckinator/chewy written to work/ex/beta-1.37-6/sources/1.36.0/gh/duckinator/chewy/Cargo.toml
[INFO] started frobbing duckinator/chewy
[INFO] finished frobbing duckinator/chewy
[INFO] frobbed toml for duckinator/chewy written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/duckinator/chewy/Cargo.toml
[INFO] crate duckinator/chewy already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing duckinator/chewy against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/duckinator/chewy:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] c3b768f79a450267a12c1412dba612df73cbbc12a1c6233ade89a61c45442878
[INFO] running `"docker" "start" "-a" "c3b768f79a450267a12c1412dba612df73cbbc12a1c6233ade89a61c45442878"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]    Compiling chewy v2.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `stack`
[INFO] [stderr]   --> src/main.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn execute1(stack: &mut Vec<i128>, op: String, b: i128) {
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_stack`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `"docker" "inspect" "c3b768f79a450267a12c1412dba612df73cbbc12a1c6233ade89a61c45442878"`
[INFO] running `"docker" "rm" "-f" "c3b768f79a450267a12c1412dba612df73cbbc12a1c6233ade89a61c45442878"`
[INFO] [stdout] c3b768f79a450267a12c1412dba612df73cbbc12a1c6233ade89a61c45442878
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/duckinator/chewy:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 905db21be024314df595e12d2144ad4c0b3d2a2509ba9cf9c0da76cf7c6e1a80
[INFO] running `"docker" "start" "-a" "905db21be024314df595e12d2144ad4c0b3d2a2509ba9cf9c0da76cf7c6e1a80"`
[INFO] [stderr]    Compiling chewy v2.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `stack`
[INFO] [stderr]   --> src/main.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn execute1(stack: &mut Vec<i128>, op: String, b: i128) {
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_stack`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `"docker" "inspect" "905db21be024314df595e12d2144ad4c0b3d2a2509ba9cf9c0da76cf7c6e1a80"`
[INFO] running `"docker" "rm" "-f" "905db21be024314df595e12d2144ad4c0b3d2a2509ba9cf9c0da76cf7c6e1a80"`
[INFO] [stdout] 905db21be024314df595e12d2144ad4c0b3d2a2509ba9cf9c0da76cf7c6e1a80
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/duckinator/chewy:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 966dc89e2060f3c44f4274ca82a3bb0efed4f59601f74ac92b318961900a9881
[INFO] running `"docker" "start" "-a" "966dc89e2060f3c44f4274ca82a3bb0efed4f59601f74ac92b318961900a9881"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chewy-75cb54be129b8ce7
[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" "966dc89e2060f3c44f4274ca82a3bb0efed4f59601f74ac92b318961900a9881"`
[INFO] running `"docker" "rm" "-f" "966dc89e2060f3c44f4274ca82a3bb0efed4f59601f74ac92b318961900a9881"`
[INFO] [stdout] 966dc89e2060f3c44f4274ca82a3bb0efed4f59601f74ac92b318961900a9881