[INFO] updating cached repository steveklabnik/rust-struggle
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/steveklabnik/rust-struggle
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/steveklabnik/rust-struggle" "work/ex/beta-1.38-1/sources/1.37.0/gh/steveklabnik/rust-struggle"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/steveklabnik/rust-struggle'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/steveklabnik/rust-struggle" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/steveklabnik/rust-struggle"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/steveklabnik/rust-struggle'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 076d8a2a844a08cdeba75f9e44a4a05e1a5759bd
[INFO] sha for GitHub repo steveklabnik/rust-struggle: 076d8a2a844a08cdeba75f9e44a4a05e1a5759bd
[INFO] validating manifest of steveklabnik/rust-struggle 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 steveklabnik/rust-struggle 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 steveklabnik/rust-struggle
[INFO] finished frobbing steveklabnik/rust-struggle
[INFO] frobbed toml for steveklabnik/rust-struggle written to work/ex/beta-1.38-1/sources/1.37.0/gh/steveklabnik/rust-struggle/Cargo.toml
[INFO] started frobbing steveklabnik/rust-struggle
[INFO] finished frobbing steveklabnik/rust-struggle
[INFO] frobbed toml for steveklabnik/rust-struggle written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/steveklabnik/rust-struggle/Cargo.toml
[INFO] crate steveklabnik/rust-struggle 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 steveklabnik/rust-struggle 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-0/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/steveklabnik/rust-struggle:/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] 739e38409779a4f4f03598b648f2e93d580579ba517069263dbc94ca7e977685
[INFO] running `"docker" "start" "-a" "739e38409779a4f4f03598b648f2e93d580579ba517069263dbc94ca7e977685"`
[INFO] [stderr]    Compiling struggle v1.0.0-alpha (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Component`
[INFO] [stderr]  --> src/main.rs:2:34
[INFO] [stderr]   |
[INFO] [stderr] 2 | use components::{BasicComponent, Component};
[INFO] [stderr]   |                                  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `"docker" "inspect" "739e38409779a4f4f03598b648f2e93d580579ba517069263dbc94ca7e977685"`
[INFO] running `"docker" "rm" "-f" "739e38409779a4f4f03598b648f2e93d580579ba517069263dbc94ca7e977685"`
[INFO] [stdout] 739e38409779a4f4f03598b648f2e93d580579ba517069263dbc94ca7e977685
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/steveklabnik/rust-struggle:/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] 98815648524a5c69bb614ed821af3175c52b389d0c8538f32bc5f57badeebbc1
[INFO] running `"docker" "start" "-a" "98815648524a5c69bb614ed821af3175c52b389d0c8538f32bc5f57badeebbc1"`
[INFO] [stderr]    Compiling struggle v1.0.0-alpha (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Component`
[INFO] [stderr]  --> src/main.rs:2:34
[INFO] [stderr]   |
[INFO] [stderr] 2 | use components::{BasicComponent, Component};
[INFO] [stderr]   |                                  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `"docker" "inspect" "98815648524a5c69bb614ed821af3175c52b389d0c8538f32bc5f57badeebbc1"`
[INFO] running `"docker" "rm" "-f" "98815648524a5c69bb614ed821af3175c52b389d0c8538f32bc5f57badeebbc1"`
[INFO] [stdout] 98815648524a5c69bb614ed821af3175c52b389d0c8538f32bc5f57badeebbc1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/steveklabnik/rust-struggle:/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] e01207d425fd0b1749d2bacaee33ecc9db610f0a3726cfde828f0e2274015647
[INFO] running `"docker" "start" "-a" "e01207d425fd0b1749d2bacaee33ecc9db610f0a3726cfde828f0e2274015647"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/struggle-0c089396c3f64dbf
[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" "e01207d425fd0b1749d2bacaee33ecc9db610f0a3726cfde828f0e2274015647"`
[INFO] running `"docker" "rm" "-f" "e01207d425fd0b1749d2bacaee33ecc9db610f0a3726cfde828f0e2274015647"`
[INFO] [stdout] e01207d425fd0b1749d2bacaee33ecc9db610f0a3726cfde828f0e2274015647