[INFO] updating cached repository defcronyke/rust-struct-optional-field
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/defcronyke/rust-struct-optional-field
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/defcronyke/rust-struct-optional-field" "work/ex/beta-1.38-1/sources/1.37.0/gh/defcronyke/rust-struct-optional-field"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/defcronyke/rust-struct-optional-field'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/defcronyke/rust-struct-optional-field" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/defcronyke/rust-struct-optional-field"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/defcronyke/rust-struct-optional-field'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8e1a9be00ad9c6bb799070db1c948f7463a849d7
[INFO] sha for GitHub repo defcronyke/rust-struct-optional-field: 8e1a9be00ad9c6bb799070db1c948f7463a849d7
[INFO] validating manifest of defcronyke/rust-struct-optional-field 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 defcronyke/rust-struct-optional-field 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 defcronyke/rust-struct-optional-field
[INFO] finished frobbing defcronyke/rust-struct-optional-field
[INFO] frobbed toml for defcronyke/rust-struct-optional-field written to work/ex/beta-1.38-1/sources/1.37.0/gh/defcronyke/rust-struct-optional-field/Cargo.toml
[INFO] started frobbing defcronyke/rust-struct-optional-field
[INFO] finished frobbing defcronyke/rust-struct-optional-field
[INFO] frobbed toml for defcronyke/rust-struct-optional-field written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/defcronyke/rust-struct-optional-field/Cargo.toml
[INFO] crate defcronyke/rust-struct-optional-field 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] [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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing defcronyke/rust-struct-optional-field 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-7/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/defcronyke/rust-struct-optional-field:/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] 8f77e7c2b32f2490b9b6dff860a9441afdf11677c8e68a730ff32ceef10e3b95
[INFO] running `"docker" "start" "-a" "8f77e7c2b32f2490b9b6dff860a9441afdf11677c8e68a730ff32ceef10e3b95"`
[INFO] [stderr]    Compiling struct-test v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `"docker" "inspect" "8f77e7c2b32f2490b9b6dff860a9441afdf11677c8e68a730ff32ceef10e3b95"`
[INFO] running `"docker" "rm" "-f" "8f77e7c2b32f2490b9b6dff860a9441afdf11677c8e68a730ff32ceef10e3b95"`
[INFO] [stdout] 8f77e7c2b32f2490b9b6dff860a9441afdf11677c8e68a730ff32ceef10e3b95
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/defcronyke/rust-struct-optional-field:/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] 3bbb83b2920bd2f133de8fa0cb5120c3e1f82d147b8ebac7994e9433eba1907f
[INFO] running `"docker" "start" "-a" "3bbb83b2920bd2f133de8fa0cb5120c3e1f82d147b8ebac7994e9433eba1907f"`
[INFO] [stderr]    Compiling struct-test v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `"docker" "inspect" "3bbb83b2920bd2f133de8fa0cb5120c3e1f82d147b8ebac7994e9433eba1907f"`
[INFO] running `"docker" "rm" "-f" "3bbb83b2920bd2f133de8fa0cb5120c3e1f82d147b8ebac7994e9433eba1907f"`
[INFO] [stdout] 3bbb83b2920bd2f133de8fa0cb5120c3e1f82d147b8ebac7994e9433eba1907f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/defcronyke/rust-struct-optional-field:/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] 47e07cb22e2e6953734360ae7a1894e25d38a920d74753041bdbacfe4c50e658
[INFO] running `"docker" "start" "-a" "47e07cb22e2e6953734360ae7a1894e25d38a920d74753041bdbacfe4c50e658"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/struct_test-cf6fa73ddf8e1d68
[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" "47e07cb22e2e6953734360ae7a1894e25d38a920d74753041bdbacfe4c50e658"`
[INFO] running `"docker" "rm" "-f" "47e07cb22e2e6953734360ae7a1894e25d38a920d74753041bdbacfe4c50e658"`
[INFO] [stdout] 47e07cb22e2e6953734360ae7a1894e25d38a920d74753041bdbacfe4c50e658