[INFO] updating cached repository jonny7/rust-ownership
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jonny7/rust-ownership
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jonny7/rust-ownership" "work/ex/beta-1.38-1/sources/1.37.0/gh/jonny7/rust-ownership"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/jonny7/rust-ownership'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jonny7/rust-ownership" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jonny7/rust-ownership"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jonny7/rust-ownership'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f54265e8b091db866bad7abc334d76d1d70787f0
[INFO] sha for GitHub repo jonny7/rust-ownership: f54265e8b091db866bad7abc334d76d1d70787f0
[INFO] validating manifest of jonny7/rust-ownership 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 jonny7/rust-ownership 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 jonny7/rust-ownership
[INFO] finished frobbing jonny7/rust-ownership
[INFO] frobbed toml for jonny7/rust-ownership written to work/ex/beta-1.38-1/sources/1.37.0/gh/jonny7/rust-ownership/Cargo.toml
[INFO] started frobbing jonny7/rust-ownership
[INFO] finished frobbing jonny7/rust-ownership
[INFO] frobbed toml for jonny7/rust-ownership written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jonny7/rust-ownership/Cargo.toml
[INFO] crate jonny7/rust-ownership 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing jonny7/rust-ownership 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/jonny7/rust-ownership:/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] 8070bb4ac7621db170fd46b7cbbaeb9ae0e6b84e3c72b7c555af974826a86cf6
[INFO] running `"docker" "start" "-a" "8070bb4ac7621db170fd46b7cbbaeb9ae0e6b84e3c72b7c555af974826a86cf6"`
[INFO] [stderr]    Compiling ownership v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `s1`
[INFO] [stderr]   --> src/main.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let s1 = gives_ownership();         // gives_ownership moves its return
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_s1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s3`
[INFO] [stderr]   --> src/main.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let s3 = takes_and_gives_back(s2);  // s2 is moved into
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_s3`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "8070bb4ac7621db170fd46b7cbbaeb9ae0e6b84e3c72b7c555af974826a86cf6"`
[INFO] running `"docker" "rm" "-f" "8070bb4ac7621db170fd46b7cbbaeb9ae0e6b84e3c72b7c555af974826a86cf6"`
[INFO] [stdout] 8070bb4ac7621db170fd46b7cbbaeb9ae0e6b84e3c72b7c555af974826a86cf6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/jonny7/rust-ownership:/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] 56b65e28706d1126b850372132b4aac324f78f148e6c0a61d1788b74aeccb86e
[INFO] running `"docker" "start" "-a" "56b65e28706d1126b850372132b4aac324f78f148e6c0a61d1788b74aeccb86e"`
[INFO] [stderr]    Compiling ownership v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `s1`
[INFO] [stderr]   --> src/main.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let s1 = gives_ownership();         // gives_ownership moves its return
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_s1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s3`
[INFO] [stderr]   --> src/main.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let s3 = takes_and_gives_back(s2);  // s2 is moved into
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_s3`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "56b65e28706d1126b850372132b4aac324f78f148e6c0a61d1788b74aeccb86e"`
[INFO] running `"docker" "rm" "-f" "56b65e28706d1126b850372132b4aac324f78f148e6c0a61d1788b74aeccb86e"`
[INFO] [stdout] 56b65e28706d1126b850372132b4aac324f78f148e6c0a61d1788b74aeccb86e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/jonny7/rust-ownership:/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] 485fae36fcc7a0c2d7d292d41706ffca07ed4c8ac0b4e4060ff80a58b61c3557
[INFO] running `"docker" "start" "-a" "485fae36fcc7a0c2d7d292d41706ffca07ed4c8ac0b4e4060ff80a58b61c3557"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ownership-cf06928d72a4bc10
[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" "485fae36fcc7a0c2d7d292d41706ffca07ed4c8ac0b4e4060ff80a58b61c3557"`
[INFO] running `"docker" "rm" "-f" "485fae36fcc7a0c2d7d292d41706ffca07ed4c8ac0b4e4060ff80a58b61c3557"`
[INFO] [stdout] 485fae36fcc7a0c2d7d292d41706ffca07ed4c8ac0b4e4060ff80a58b61c3557