[INFO] updating cached repository eudaimonia/problem_of_rust_lifetime
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/eudaimonia/problem_of_rust_lifetime
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/eudaimonia/problem_of_rust_lifetime" "work/ex/beta-1.38-1/sources/1.37.0/gh/eudaimonia/problem_of_rust_lifetime"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/eudaimonia/problem_of_rust_lifetime'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/eudaimonia/problem_of_rust_lifetime" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/eudaimonia/problem_of_rust_lifetime"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/eudaimonia/problem_of_rust_lifetime'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ff5e7d2169109fa52e5acc957430035d69021729
[INFO] sha for GitHub repo eudaimonia/problem_of_rust_lifetime: ff5e7d2169109fa52e5acc957430035d69021729
[INFO] validating manifest of eudaimonia/problem_of_rust_lifetime 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 eudaimonia/problem_of_rust_lifetime 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 eudaimonia/problem_of_rust_lifetime
[INFO] finished frobbing eudaimonia/problem_of_rust_lifetime
[INFO] frobbed toml for eudaimonia/problem_of_rust_lifetime written to work/ex/beta-1.38-1/sources/1.37.0/gh/eudaimonia/problem_of_rust_lifetime/Cargo.toml
[INFO] started frobbing eudaimonia/problem_of_rust_lifetime
[INFO] finished frobbing eudaimonia/problem_of_rust_lifetime
[INFO] frobbed toml for eudaimonia/problem_of_rust_lifetime written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/eudaimonia/problem_of_rust_lifetime/Cargo.toml
[INFO] crate eudaimonia/problem_of_rust_lifetime 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 eudaimonia/problem_of_rust_lifetime 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/eudaimonia/problem_of_rust_lifetime:/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] 6650f3c9444c51c44141be4d9b72337271b3c8d71701248283b0ad42eb7dde80
[INFO] running `"docker" "start" "-a" "6650f3c9444c51c44141be4d9b72337271b3c8d71701248283b0ad42eb7dde80"`
[INFO] [stderr]    Compiling r57 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn new(con: &'s Context) -> Self {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "6650f3c9444c51c44141be4d9b72337271b3c8d71701248283b0ad42eb7dde80"`
[INFO] running `"docker" "rm" "-f" "6650f3c9444c51c44141be4d9b72337271b3c8d71701248283b0ad42eb7dde80"`
[INFO] [stdout] 6650f3c9444c51c44141be4d9b72337271b3c8d71701248283b0ad42eb7dde80
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/eudaimonia/problem_of_rust_lifetime:/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] f68912201b868a82806e2d2d410485275ad003f4e1b80571159b810e2a8d5e6d
[INFO] running `"docker" "start" "-a" "f68912201b868a82806e2d2d410485275ad003f4e1b80571159b810e2a8d5e6d"`
[INFO] [stderr]    Compiling r57 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn new(con: &'s Context) -> Self {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "f68912201b868a82806e2d2d410485275ad003f4e1b80571159b810e2a8d5e6d"`
[INFO] running `"docker" "rm" "-f" "f68912201b868a82806e2d2d410485275ad003f4e1b80571159b810e2a8d5e6d"`
[INFO] [stdout] f68912201b868a82806e2d2d410485275ad003f4e1b80571159b810e2a8d5e6d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/eudaimonia/problem_of_rust_lifetime:/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] cdb6faf46348372facb88a8ad52793dfb46d7be4e08519b7e91f9b7d0483ef8e
[INFO] running `"docker" "start" "-a" "cdb6faf46348372facb88a8ad52793dfb46d7be4e08519b7e91f9b7d0483ef8e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/r57-f076e10ee33181b5
[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" "cdb6faf46348372facb88a8ad52793dfb46d7be4e08519b7e91f9b7d0483ef8e"`
[INFO] running `"docker" "rm" "-f" "cdb6faf46348372facb88a8ad52793dfb46d7be4e08519b7e91f9b7d0483ef8e"`
[INFO] [stdout] cdb6faf46348372facb88a8ad52793dfb46d7be4e08519b7e91f9b7d0483ef8e