[INFO] updating cached repository wbigger/RustIntro
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/wbigger/RustIntro
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/wbigger/RustIntro" "work/ex/beta-1.38-1/sources/1.37.0/gh/wbigger/RustIntro"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/wbigger/RustIntro'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/wbigger/RustIntro" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wbigger/RustIntro"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wbigger/RustIntro'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7e1c039a0b5396dc86b1435860f521e4065dea32
[INFO] sha for GitHub repo wbigger/RustIntro: 7e1c039a0b5396dc86b1435860f521e4065dea32
[INFO] validating manifest of wbigger/RustIntro 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 wbigger/RustIntro 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 wbigger/RustIntro
[INFO] finished frobbing wbigger/RustIntro
[INFO] frobbed toml for wbigger/RustIntro written to work/ex/beta-1.38-1/sources/1.37.0/gh/wbigger/RustIntro/Cargo.toml
[INFO] started frobbing wbigger/RustIntro
[INFO] finished frobbing wbigger/RustIntro
[INFO] frobbed toml for wbigger/RustIntro written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wbigger/RustIntro/Cargo.toml
[INFO] crate wbigger/RustIntro 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 wbigger/RustIntro 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/wbigger/RustIntro:/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] c6697af8b17d59caae2322d1e32b060dd47c91a8a494e3e932a7349f4158d267
[INFO] running `"docker" "start" "-a" "c6697af8b17d59caae2322d1e32b060dd47c91a8a494e3e932a7349f4158d267"`
[INFO] [stderr]    Compiling RustIntro v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `s1`
[INFO] [stderr]  --> src/lifetime.rs:5:10
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let (s1,s2) = line.split_at(prefix.len());
[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: `vec`
[INFO] [stderr]  --> src/borrowing.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn user(vec: &Vec<i32>) {
[INFO] [stderr]   |         ^^^ help: consider prefixing with an underscore: `_vec`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vec`
[INFO] [stderr]  --> src/ownership.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn take(vec: Vec<i32>) {
[INFO] [stderr]   |         ^^^ help: consider prefixing with an underscore: `_vec`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
[INFO] running `"docker" "inspect" "c6697af8b17d59caae2322d1e32b060dd47c91a8a494e3e932a7349f4158d267"`
[INFO] running `"docker" "rm" "-f" "c6697af8b17d59caae2322d1e32b060dd47c91a8a494e3e932a7349f4158d267"`
[INFO] [stdout] c6697af8b17d59caae2322d1e32b060dd47c91a8a494e3e932a7349f4158d267
[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/wbigger/RustIntro:/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] b835c79d9710e66415662aefa76717180da9d80ae85f1d7ae9da27ac770e3363
[INFO] running `"docker" "start" "-a" "b835c79d9710e66415662aefa76717180da9d80ae85f1d7ae9da27ac770e3363"`
[INFO] [stderr]    Compiling RustIntro v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `vec`
[INFO] [stderr]  --> src/ownership.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn take(vec: Vec<i32>) {
[INFO] [stderr]   |         ^^^ help: consider prefixing with an underscore: `_vec`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vec`
[INFO] [stderr]  --> src/borrowing.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn user(vec: &Vec<i32>) {
[INFO] [stderr]   |         ^^^ help: consider prefixing with an underscore: `_vec`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s1`
[INFO] [stderr]  --> src/lifetime.rs:5:10
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let (s1,s2) = line.split_at(prefix.len());
[INFO] [stderr]   |          ^^ help: consider prefixing with an underscore: `_s1`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `"docker" "inspect" "b835c79d9710e66415662aefa76717180da9d80ae85f1d7ae9da27ac770e3363"`
[INFO] running `"docker" "rm" "-f" "b835c79d9710e66415662aefa76717180da9d80ae85f1d7ae9da27ac770e3363"`
[INFO] [stdout] b835c79d9710e66415662aefa76717180da9d80ae85f1d7ae9da27ac770e3363
[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/wbigger/RustIntro:/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] bbe145869ac3b50204783e588f43e5b539876aa0fdb670cb0939910d04b65536
[INFO] running `"docker" "start" "-a" "bbe145869ac3b50204783e588f43e5b539876aa0fdb670cb0939910d04b65536"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/borrowing-6bad5cec9d7460dc
[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] [stderr]      Running /opt/crater/target/debug/deps/lifetime-d5afafe76782fcd2
[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] [stderr]      Running /opt/crater/target/debug/deps/ownership-69551e18bca8ff39
[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" "bbe145869ac3b50204783e588f43e5b539876aa0fdb670cb0939910d04b65536"`
[INFO] running `"docker" "rm" "-f" "bbe145869ac3b50204783e588f43e5b539876aa0fdb670cb0939910d04b65536"`
[INFO] [stdout] bbe145869ac3b50204783e588f43e5b539876aa0fdb670cb0939910d04b65536