[INFO] updating cached repository treetertot/sorting-playground
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/treetertot/sorting-playground
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/treetertot/sorting-playground" "work/ex/beta-1.38-1/sources/1.37.0/gh/treetertot/sorting-playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/treetertot/sorting-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/treetertot/sorting-playground" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/treetertot/sorting-playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/treetertot/sorting-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 09594fb9f481d12f18fd7414f13a84dcfa6ab8c4
[INFO] sha for GitHub repo treetertot/sorting-playground: 09594fb9f481d12f18fd7414f13a84dcfa6ab8c4
[INFO] validating manifest of treetertot/sorting-playground 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 treetertot/sorting-playground 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 treetertot/sorting-playground
[INFO] finished frobbing treetertot/sorting-playground
[INFO] frobbed toml for treetertot/sorting-playground written to work/ex/beta-1.38-1/sources/1.37.0/gh/treetertot/sorting-playground/Cargo.toml
[INFO] started frobbing treetertot/sorting-playground
[INFO] finished frobbing treetertot/sorting-playground
[INFO] frobbed toml for treetertot/sorting-playground written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/treetertot/sorting-playground/Cargo.toml
[INFO] crate treetertot/sorting-playground 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing treetertot/sorting-playground 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/treetertot/sorting-playground:/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] d220764992fa07b1febee1cebc2eebaf6a7652134c80e69ea4216ac6170d2dbc
[INFO] running `"docker" "start" "-a" "d220764992fa07b1febee1cebc2eebaf6a7652134c80e69ea4216ac6170d2dbc"`
[INFO] [stderr]    Compiling mergesort v0.1.0 (https://github.com/treetertot/Joshsort.git#a3ff0ee8)
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.0
[INFO] [stderr]    Compiling sorting v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `multi_sort`
[INFO] [stderr]  --> src/main.rs:1:18
[INFO] [stderr]   |
[INFO] [stderr] 1 | use mergesort::{ multi_sort, sort };
[INFO] [stderr]   |                  ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.61s
[INFO] running `"docker" "inspect" "d220764992fa07b1febee1cebc2eebaf6a7652134c80e69ea4216ac6170d2dbc"`
[INFO] running `"docker" "rm" "-f" "d220764992fa07b1febee1cebc2eebaf6a7652134c80e69ea4216ac6170d2dbc"`
[INFO] [stdout] d220764992fa07b1febee1cebc2eebaf6a7652134c80e69ea4216ac6170d2dbc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/treetertot/sorting-playground:/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] 1dda2dcbc92e9a2953b259a30303ecbb46b2e93c1d04f3d59ef0abaceb91d21f
[INFO] running `"docker" "start" "-a" "1dda2dcbc92e9a2953b259a30303ecbb46b2e93c1d04f3d59ef0abaceb91d21f"`
[INFO] [stderr]    Compiling sorting v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `multi_sort`
[INFO] [stderr]  --> src/main.rs:1:18
[INFO] [stderr]   |
[INFO] [stderr] 1 | use mergesort::{ multi_sort, sort };
[INFO] [stderr]   |                  ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `"docker" "inspect" "1dda2dcbc92e9a2953b259a30303ecbb46b2e93c1d04f3d59ef0abaceb91d21f"`
[INFO] running `"docker" "rm" "-f" "1dda2dcbc92e9a2953b259a30303ecbb46b2e93c1d04f3d59ef0abaceb91d21f"`
[INFO] [stdout] 1dda2dcbc92e9a2953b259a30303ecbb46b2e93c1d04f3d59ef0abaceb91d21f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/treetertot/sorting-playground:/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] 2a1aca3f050c5ce996707cc0edddc98b8d8b90f9d3704ac44f53dfd468923a6e
[INFO] running `"docker" "start" "-a" "2a1aca3f050c5ce996707cc0edddc98b8d8b90f9d3704ac44f53dfd468923a6e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sorting-4d3d4aadbf00ffdc
[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" "2a1aca3f050c5ce996707cc0edddc98b8d8b90f9d3704ac44f53dfd468923a6e"`
[INFO] running `"docker" "rm" "-f" "2a1aca3f050c5ce996707cc0edddc98b8d8b90f9d3704ac44f53dfd468923a6e"`
[INFO] [stdout] 2a1aca3f050c5ce996707cc0edddc98b8d8b90f9d3704ac44f53dfd468923a6e