[INFO] updating cached repository mebmichael/fraction-code-challenge
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mebmichael/fraction-code-challenge
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mebmichael/fraction-code-challenge" "work/ex/beta-1.38-1/sources/1.37.0/gh/mebmichael/fraction-code-challenge"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mebmichael/fraction-code-challenge'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mebmichael/fraction-code-challenge" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mebmichael/fraction-code-challenge"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mebmichael/fraction-code-challenge'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 501ea2be5701c42ed1ac01e74b16ce761a0ce6ae
[INFO] sha for GitHub repo mebmichael/fraction-code-challenge: 501ea2be5701c42ed1ac01e74b16ce761a0ce6ae
[INFO] validating manifest of mebmichael/fraction-code-challenge 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 mebmichael/fraction-code-challenge 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 mebmichael/fraction-code-challenge
[INFO] finished frobbing mebmichael/fraction-code-challenge
[INFO] frobbed toml for mebmichael/fraction-code-challenge written to work/ex/beta-1.38-1/sources/1.37.0/gh/mebmichael/fraction-code-challenge/Cargo.toml
[INFO] started frobbing mebmichael/fraction-code-challenge
[INFO] finished frobbing mebmichael/fraction-code-challenge
[INFO] frobbed toml for mebmichael/fraction-code-challenge written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mebmichael/fraction-code-challenge/Cargo.toml
[INFO] crate mebmichael/fraction-code-challenge 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mebmichael/fraction-code-challenge 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mebmichael/fraction-code-challenge:/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] 10e0c588845fee3becd483191e8736761284d526ae02fce3f5be0484e0223930
[INFO] running `"docker" "start" "-a" "10e0c588845fee3becd483191e8736761284d526ae02fce3f5be0484e0223930"`
[INFO] [stderr]    Compiling fraction-code-challenge v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `num` is never read
[INFO] [stderr]    --> src/fraction/frac.rs:231:17
[INFO] [stderr]     |
[INFO] [stderr] 231 |         let mut num: i32 = 1;
[INFO] [stderr]     |                 ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |     io::stdout().flush();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:82:9
[INFO] [stderr]    |
[INFO] [stderr] 82 |         io::stdout().flush();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "10e0c588845fee3becd483191e8736761284d526ae02fce3f5be0484e0223930"`
[INFO] running `"docker" "rm" "-f" "10e0c588845fee3becd483191e8736761284d526ae02fce3f5be0484e0223930"`
[INFO] [stdout] 10e0c588845fee3becd483191e8736761284d526ae02fce3f5be0484e0223930
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mebmichael/fraction-code-challenge:/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] 30553db4dd3987c25eff8bfcd417aae0ee1162c15fe0666bc1626e03128df18e
[INFO] running `"docker" "start" "-a" "30553db4dd3987c25eff8bfcd417aae0ee1162c15fe0666bc1626e03128df18e"`
[INFO] [stderr]    Compiling fraction-code-challenge v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `num` is never read
[INFO] [stderr]    --> src/fraction/frac.rs:231:17
[INFO] [stderr]     |
[INFO] [stderr] 231 |         let mut num: i32 = 1;
[INFO] [stderr]     |                 ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |     io::stdout().flush();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:82:9
[INFO] [stderr]    |
[INFO] [stderr] 82 |         io::stdout().flush();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "30553db4dd3987c25eff8bfcd417aae0ee1162c15fe0666bc1626e03128df18e"`
[INFO] running `"docker" "rm" "-f" "30553db4dd3987c25eff8bfcd417aae0ee1162c15fe0666bc1626e03128df18e"`
[INFO] [stdout] 30553db4dd3987c25eff8bfcd417aae0ee1162c15fe0666bc1626e03128df18e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mebmichael/fraction-code-challenge:/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] 08f441a6196937b31a43c5eb920887287c30c194f206d7027ddad3936345d275
[INFO] running `"docker" "start" "-a" "08f441a6196937b31a43c5eb920887287c30c194f206d7027ddad3936345d275"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/fraction_code_challenge-df6ec0ae338940b8
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test fraction::frac::test_fraction_add ... ok
[INFO] [stdout] test fraction::frac::test_fraction_div ... ok
[INFO] [stdout] test fraction::frac::test_fraction_from_str ... ok
[INFO] [stdout] test fraction::frac::test_fraction_sub ... ok
[INFO] [stdout] test fraction::gcd::test_gcd ... ok
[INFO] [stdout] test fraction::frac::test_fraction_mul ... ok
[INFO] [stdout] test fraction::frac::test_pretty_print ... ok
[INFO] [stdout] test fraction::frac::test_fraction_reduced ... ok
[INFO] [stdout] test test_evaluate_expression ... ok
[INFO] [stdout] test test_remove_excess_whitespace ... ok
[INFO] [stdout] test fraction::frac::test_fraction_eq ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "08f441a6196937b31a43c5eb920887287c30c194f206d7027ddad3936345d275"`
[INFO] running `"docker" "rm" "-f" "08f441a6196937b31a43c5eb920887287c30c194f206d7027ddad3936345d275"`
[INFO] [stdout] 08f441a6196937b31a43c5eb920887287c30c194f206d7027ddad3936345d275