[INFO] updating cached repository tonis2/exercising-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tonis2/exercising-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tonis2/exercising-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/tonis2/exercising-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/tonis2/exercising-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tonis2/exercising-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tonis2/exercising-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tonis2/exercising-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a012590ccfd515f730b8fa48e07737f6bfdf95a1
[INFO] sha for GitHub repo tonis2/exercising-rust: a012590ccfd515f730b8fa48e07737f6bfdf95a1
[INFO] validating manifest of tonis2/exercising-rust 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 tonis2/exercising-rust 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 tonis2/exercising-rust
[INFO] finished frobbing tonis2/exercising-rust
[INFO] frobbed toml for tonis2/exercising-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/tonis2/exercising-rust/Cargo.toml
[INFO] started frobbing tonis2/exercising-rust
[INFO] finished frobbing tonis2/exercising-rust
[INFO] frobbed toml for tonis2/exercising-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tonis2/exercising-rust/Cargo.toml
[INFO] crate tonis2/exercising-rust 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 tonis2/exercising-rust 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/tonis2/exercising-rust:/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] ac2d35236c7ea03fe207c25b41b59b2d46e46903d499b3e442ae352526a6d168
[INFO] running `"docker" "start" "-a" "ac2d35236c7ea03fe207c25b41b59b2d46e46903d499b3e442ae352526a6d168"`
[INFO] [stderr]    Compiling start v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/main.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let c = pointer::pointer::CustomSmartPointer { data: String::from("my stuff") };
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_c`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]   --> src/main.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let d = pointer::pointer::CustomSmartPointer { data: String::from("other stuff") };
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `"docker" "inspect" "ac2d35236c7ea03fe207c25b41b59b2d46e46903d499b3e442ae352526a6d168"`
[INFO] running `"docker" "rm" "-f" "ac2d35236c7ea03fe207c25b41b59b2d46e46903d499b3e442ae352526a6d168"`
[INFO] [stdout] ac2d35236c7ea03fe207c25b41b59b2d46e46903d499b3e442ae352526a6d168
[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/tonis2/exercising-rust:/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] 3a7092fabab2e0cb389bda6ef6280ba4acca25309639206cc55b0ff102763855
[INFO] running `"docker" "start" "-a" "3a7092fabab2e0cb389bda6ef6280ba4acca25309639206cc55b0ff102763855"`
[INFO] [stderr]    Compiling start v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/main.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let c = pointer::pointer::CustomSmartPointer { data: String::from("my stuff") };
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_c`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]   --> src/main.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let d = pointer::pointer::CustomSmartPointer { data: String::from("other stuff") };
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `"docker" "inspect" "3a7092fabab2e0cb389bda6ef6280ba4acca25309639206cc55b0ff102763855"`
[INFO] running `"docker" "rm" "-f" "3a7092fabab2e0cb389bda6ef6280ba4acca25309639206cc55b0ff102763855"`
[INFO] [stdout] 3a7092fabab2e0cb389bda6ef6280ba4acca25309639206cc55b0ff102763855
[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/tonis2/exercising-rust:/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] 84e6cb4aa7a0c74d2eb0936bf4ddaa6d4e5e8b81f497bb6807728f5936387ccb
[INFO] running `"docker" "start" "-a" "84e6cb4aa7a0c74d2eb0936bf4ddaa6d4e5e8b81f497bb6807728f5936387ccb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/start-f877212fb7f26472
[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" "84e6cb4aa7a0c74d2eb0936bf4ddaa6d4e5e8b81f497bb6807728f5936387ccb"`
[INFO] running `"docker" "rm" "-f" "84e6cb4aa7a0c74d2eb0936bf4ddaa6d4e5e8b81f497bb6807728f5936387ccb"`
[INFO] [stdout] 84e6cb4aa7a0c74d2eb0936bf4ddaa6d4e5e8b81f497bb6807728f5936387ccb