[INFO] updating cached repository lbonn/i3-focus-last
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lbonn/i3-focus-last
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lbonn/i3-focus-last" "work/ex/beta-1.38-1/sources/1.37.0/gh/lbonn/i3-focus-last"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/lbonn/i3-focus-last'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lbonn/i3-focus-last" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lbonn/i3-focus-last"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lbonn/i3-focus-last'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 43bdfc190ac9b283e8e8a3b37ad13a4251f638c3
[INFO] sha for GitHub repo lbonn/i3-focus-last: 43bdfc190ac9b283e8e8a3b37ad13a4251f638c3
[INFO] validating manifest of lbonn/i3-focus-last 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 lbonn/i3-focus-last 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 lbonn/i3-focus-last
[INFO] finished frobbing lbonn/i3-focus-last
[INFO] frobbed toml for lbonn/i3-focus-last written to work/ex/beta-1.38-1/sources/1.37.0/gh/lbonn/i3-focus-last/Cargo.toml
[INFO] started frobbing lbonn/i3-focus-last
[INFO] finished frobbing lbonn/i3-focus-last
[INFO] frobbed toml for lbonn/i3-focus-last written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lbonn/i3-focus-last/Cargo.toml
[INFO] crate lbonn/i3-focus-last 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 lbonn/i3-focus-last against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lbonn/i3-focus-last:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] f153323fed4679e474c7920c22df6b528b47f82bc37f53e87c7623cf6246f860
[INFO] running `"docker" "start" "-a" "f153323fed4679e474c7920c22df6b528b47f82bc37f53e87c7623cf6246f860"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.23
[INFO] [stderr]    Compiling serde_json v1.0.33
[INFO] [stderr]    Compiling rmp v0.8.7
[INFO] [stderr]    Compiling rmp-serde v0.13.7
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.15.20
[INFO] [stderr]    Compiling i3ipc v0.9.0
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling i3-focus-last v0.2.2 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:36:67
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn focus_nth(windows: &VecDeque<i64>, n: usize) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                   ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.26s
[INFO] running `"docker" "inspect" "f153323fed4679e474c7920c22df6b528b47f82bc37f53e87c7623cf6246f860"`
[INFO] running `"docker" "rm" "-f" "f153323fed4679e474c7920c22df6b528b47f82bc37f53e87c7623cf6246f860"`
[INFO] [stdout] f153323fed4679e474c7920c22df6b528b47f82bc37f53e87c7623cf6246f860
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lbonn/i3-focus-last:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] fe4ff3bf8006ae52a7614270adbc14bc665ed8b5219deb24bea144332ec551da
[INFO] running `"docker" "start" "-a" "fe4ff3bf8006ae52a7614270adbc14bc665ed8b5219deb24bea144332ec551da"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling i3-focus-last v0.2.2 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:36:67
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn focus_nth(windows: &VecDeque<i64>, n: usize) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                   ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "fe4ff3bf8006ae52a7614270adbc14bc665ed8b5219deb24bea144332ec551da"`
[INFO] running `"docker" "rm" "-f" "fe4ff3bf8006ae52a7614270adbc14bc665ed8b5219deb24bea144332ec551da"`
[INFO] [stdout] fe4ff3bf8006ae52a7614270adbc14bc665ed8b5219deb24bea144332ec551da
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lbonn/i3-focus-last:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 64dc3a8525d6b38e879e283713faa90bdbc9e702dcb4ea355d53bb8f74cb97ae
[INFO] running `"docker" "start" "-a" "64dc3a8525d6b38e879e283713faa90bdbc9e702dcb4ea355d53bb8f74cb97ae"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/i3_focus_last-4ffc4ff91140a842
[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" "64dc3a8525d6b38e879e283713faa90bdbc9e702dcb4ea355d53bb8f74cb97ae"`
[INFO] running `"docker" "rm" "-f" "64dc3a8525d6b38e879e283713faa90bdbc9e702dcb4ea355d53bb8f74cb97ae"`
[INFO] [stdout] 64dc3a8525d6b38e879e283713faa90bdbc9e702dcb4ea355d53bb8f74cb97ae