[INFO] updating cached repository illicitonion/cargo-2018-use-repro
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/illicitonion/cargo-2018-use-repro
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/illicitonion/cargo-2018-use-repro" "work/ex/beta-1.38-1/sources/1.37.0/gh/illicitonion/cargo-2018-use-repro"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/illicitonion/cargo-2018-use-repro'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/illicitonion/cargo-2018-use-repro" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/illicitonion/cargo-2018-use-repro"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/illicitonion/cargo-2018-use-repro'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 62c898a70f9baab942325b9e0dece32c5c0fc1fc
[INFO] sha for GitHub repo illicitonion/cargo-2018-use-repro: 62c898a70f9baab942325b9e0dece32c5c0fc1fc
[INFO] validating manifest of illicitonion/cargo-2018-use-repro 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 illicitonion/cargo-2018-use-repro 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 illicitonion/cargo-2018-use-repro
[INFO] finished frobbing illicitonion/cargo-2018-use-repro
[INFO] frobbed toml for illicitonion/cargo-2018-use-repro written to work/ex/beta-1.38-1/sources/1.37.0/gh/illicitonion/cargo-2018-use-repro/Cargo.toml
[INFO] started frobbing illicitonion/cargo-2018-use-repro
[INFO] finished frobbing illicitonion/cargo-2018-use-repro
[INFO] frobbed toml for illicitonion/cargo-2018-use-repro written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/illicitonion/cargo-2018-use-repro/Cargo.toml
[INFO] crate illicitonion/cargo-2018-use-repro 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 illicitonion/cargo-2018-use-repro 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/illicitonion/cargo-2018-use-repro:/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] 4a13f4813b54dd70e2a1ea5bd76d96420a769065fe1c2760856bfc707edd0620
[INFO] running `"docker" "start" "-a" "4a13f4813b54dd70e2a1ea5bd76d96420a769065fe1c2760856bfc707edd0620"`
[INFO] [stderr]    Compiling rust-use-repro v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `::indexmap`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use ::indexmap;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `indexmap`
[INFO] [stderr]  --> src/main.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let indexmap = String::new();
[INFO] [stderr]   |         ^^^^^^^^ help: consider prefixing with an underscore: `_indexmap`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "4a13f4813b54dd70e2a1ea5bd76d96420a769065fe1c2760856bfc707edd0620"`
[INFO] running `"docker" "rm" "-f" "4a13f4813b54dd70e2a1ea5bd76d96420a769065fe1c2760856bfc707edd0620"`
[INFO] [stdout] 4a13f4813b54dd70e2a1ea5bd76d96420a769065fe1c2760856bfc707edd0620
[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/illicitonion/cargo-2018-use-repro:/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] 0b175009c86bd67fb09306f4afed8fc058934f1a77294721aad1a390f75b5878
[INFO] running `"docker" "start" "-a" "0b175009c86bd67fb09306f4afed8fc058934f1a77294721aad1a390f75b5878"`
[INFO] [stderr]    Compiling rust-use-repro v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `::indexmap`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use ::indexmap;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `indexmap`
[INFO] [stderr]  --> src/main.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let indexmap = String::new();
[INFO] [stderr]   |         ^^^^^^^^ help: consider prefixing with an underscore: `_indexmap`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "0b175009c86bd67fb09306f4afed8fc058934f1a77294721aad1a390f75b5878"`
[INFO] running `"docker" "rm" "-f" "0b175009c86bd67fb09306f4afed8fc058934f1a77294721aad1a390f75b5878"`
[INFO] [stdout] 0b175009c86bd67fb09306f4afed8fc058934f1a77294721aad1a390f75b5878
[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/illicitonion/cargo-2018-use-repro:/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] c28f900a61d86cb82f442db084750baf471422e909b6cdd36767b64de128b9e5
[INFO] running `"docker" "start" "-a" "c28f900a61d86cb82f442db084750baf471422e909b6cdd36767b64de128b9e5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_use_repro-9a87011b567c3e0a
[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" "c28f900a61d86cb82f442db084750baf471422e909b6cdd36767b64de128b9e5"`
[INFO] running `"docker" "rm" "-f" "c28f900a61d86cb82f442db084750baf471422e909b6cdd36767b64de128b9e5"`
[INFO] [stdout] c28f900a61d86cb82f442db084750baf471422e909b6cdd36767b64de128b9e5