[INFO] updating cached repository shaopengw/cargo-check-bug-demo
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/shaopengw/cargo-check-bug-demo
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/shaopengw/cargo-check-bug-demo" "work/ex/beta-1.38-1/sources/1.37.0/gh/shaopengw/cargo-check-bug-demo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/shaopengw/cargo-check-bug-demo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/shaopengw/cargo-check-bug-demo" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shaopengw/cargo-check-bug-demo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shaopengw/cargo-check-bug-demo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1100e314cb3d5df3583ac01fffceebce699cacd0
[INFO] sha for GitHub repo shaopengw/cargo-check-bug-demo: 1100e314cb3d5df3583ac01fffceebce699cacd0
[INFO] validating manifest of shaopengw/cargo-check-bug-demo 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 shaopengw/cargo-check-bug-demo 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 shaopengw/cargo-check-bug-demo
[INFO] finished frobbing shaopengw/cargo-check-bug-demo
[INFO] frobbed toml for shaopengw/cargo-check-bug-demo written to work/ex/beta-1.38-1/sources/1.37.0/gh/shaopengw/cargo-check-bug-demo/Cargo.toml
[INFO] started frobbing shaopengw/cargo-check-bug-demo
[INFO] finished frobbing shaopengw/cargo-check-bug-demo
[INFO] frobbed toml for shaopengw/cargo-check-bug-demo written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shaopengw/cargo-check-bug-demo/Cargo.toml
[INFO] crate shaopengw/cargo-check-bug-demo 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 shaopengw/cargo-check-bug-demo 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/shaopengw/cargo-check-bug-demo:/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] 9875527b7c4f1e90372de48e89df5cf15b03aa69ec561a20d89986d6645a4477
[INFO] running `"docker" "start" "-a" "9875527b7c4f1e90372de48e89df5cf15b03aa69ec561a20d89986d6645a4477"`
[INFO] [stderr]    Compiling box-bug v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `data`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     data: Box<Enum>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `"docker" "inspect" "9875527b7c4f1e90372de48e89df5cf15b03aa69ec561a20d89986d6645a4477"`
[INFO] running `"docker" "rm" "-f" "9875527b7c4f1e90372de48e89df5cf15b03aa69ec561a20d89986d6645a4477"`
[INFO] [stdout] 9875527b7c4f1e90372de48e89df5cf15b03aa69ec561a20d89986d6645a4477
[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/shaopengw/cargo-check-bug-demo:/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] 83ad5aaa535b4983b6dee6974e06c15fa6a73bdf8fb0c34256161165bf63cb64
[INFO] running `"docker" "start" "-a" "83ad5aaa535b4983b6dee6974e06c15fa6a73bdf8fb0c34256161165bf63cb64"`
[INFO] [stderr]    Compiling box-bug v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `data`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     data: Box<Enum>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `"docker" "inspect" "83ad5aaa535b4983b6dee6974e06c15fa6a73bdf8fb0c34256161165bf63cb64"`
[INFO] running `"docker" "rm" "-f" "83ad5aaa535b4983b6dee6974e06c15fa6a73bdf8fb0c34256161165bf63cb64"`
[INFO] [stdout] 83ad5aaa535b4983b6dee6974e06c15fa6a73bdf8fb0c34256161165bf63cb64
[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/shaopengw/cargo-check-bug-demo:/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] 260bad814f0106ae61fdc08448507cbc700ffe103ba72dda23d4d41b03b824dc
[INFO] running `"docker" "start" "-a" "260bad814f0106ae61fdc08448507cbc700ffe103ba72dda23d4d41b03b824dc"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/box_bug-523d758630bb993c
[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" "260bad814f0106ae61fdc08448507cbc700ffe103ba72dda23d4d41b03b824dc"`
[INFO] running `"docker" "rm" "-f" "260bad814f0106ae61fdc08448507cbc700ffe103ba72dda23d4d41b03b824dc"`
[INFO] [stdout] 260bad814f0106ae61fdc08448507cbc700ffe103ba72dda23d4d41b03b824dc