[INFO] updating cached repository mtraina/rust-by-example
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mtraina/rust-by-example
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mtraina/rust-by-example" "work/ex/beta-1.37-6/sources/1.36.0/gh/mtraina/rust-by-example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/mtraina/rust-by-example'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mtraina/rust-by-example" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mtraina/rust-by-example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mtraina/rust-by-example'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ed4325280923327a012b599f66a8fd66154bd5e8
[INFO] sha for GitHub repo mtraina/rust-by-example: ed4325280923327a012b599f66a8fd66154bd5e8
[INFO] validating manifest of mtraina/rust-by-example on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mtraina/rust-by-example on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mtraina/rust-by-example
[INFO] finished frobbing mtraina/rust-by-example
[INFO] frobbed toml for mtraina/rust-by-example written to work/ex/beta-1.37-6/sources/1.36.0/gh/mtraina/rust-by-example/Cargo.toml
[INFO] started frobbing mtraina/rust-by-example
[INFO] finished frobbing mtraina/rust-by-example
[INFO] frobbed toml for mtraina/rust-by-example written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mtraina/rust-by-example/Cargo.toml
[INFO] crate mtraina/rust-by-example already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mtraina/rust-by-example against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mtraina/rust-by-example:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] ec2765aa4ad1ac61b03271582ea85c209305bb80b4c76b4c5126cb10e19b1533
[INFO] running `"docker" "start" "-a" "ec2765aa4ad1ac61b03271582ea85c209305bb80b4c76b4c5126cb10e19b1533"`
[INFO] [stderr]    Compiling rust_by_example v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `"docker" "inspect" "ec2765aa4ad1ac61b03271582ea85c209305bb80b4c76b4c5126cb10e19b1533"`
[INFO] running `"docker" "rm" "-f" "ec2765aa4ad1ac61b03271582ea85c209305bb80b4c76b4c5126cb10e19b1533"`
[INFO] [stdout] ec2765aa4ad1ac61b03271582ea85c209305bb80b4c76b4c5126cb10e19b1533
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mtraina/rust-by-example:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 236ebd2557e5c07092ce0f2d3c8a4609ac690cf185219ac20b93955136cf5480
[INFO] running `"docker" "start" "-a" "236ebd2557e5c07092ce0f2d3c8a4609ac690cf185219ac20b93955136cf5480"`
[INFO] [stderr]    Compiling rust_by_example v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Structure`
[INFO] [stderr]   --> examples/1_2_formatted_print.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     struct Structure(i32);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `"docker" "inspect" "236ebd2557e5c07092ce0f2d3c8a4609ac690cf185219ac20b93955136cf5480"`
[INFO] running `"docker" "rm" "-f" "236ebd2557e5c07092ce0f2d3c8a4609ac690cf185219ac20b93955136cf5480"`
[INFO] [stdout] 236ebd2557e5c07092ce0f2d3c8a4609ac690cf185219ac20b93955136cf5480
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mtraina/rust-by-example:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 7618e1a9a7b3d3b275fe86f8e11f5ce0eda55bda73928e19acd9dd86b6579497
[INFO] running `"docker" "start" "-a" "7618e1a9a7b3d3b275fe86f8e11f5ce0eda55bda73928e19acd9dd86b6579497"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_by_example-4d2ae0bae6341f8b
[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" "7618e1a9a7b3d3b275fe86f8e11f5ce0eda55bda73928e19acd9dd86b6579497"`
[INFO] running `"docker" "rm" "-f" "7618e1a9a7b3d3b275fe86f8e11f5ce0eda55bda73928e19acd9dd86b6579497"`
[INFO] [stdout] 7618e1a9a7b3d3b275fe86f8e11f5ce0eda55bda73928e19acd9dd86b6579497