[INFO] updating cached repository https://github.com/mebmichael/fraction-code-challenge
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 501ea2be5701c42ed1ac01e74b16ce761a0ce6ae
[INFO] testing mebmichael/fraction-code-challenge against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmebmichael%2Ffraction-code-challenge" "work/builds/worker-1/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mebmichael/fraction-code-challenge on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/mebmichael/fraction-code-challenge
[INFO] finished tweaking git repo https://github.com/mebmichael/fraction-code-challenge
[INFO] tweaked toml for git repo https://github.com/mebmichael/fraction-code-challenge written to work/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/mebmichael/fraction-code-challenge already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 4a7baa481d0b36844b29bebee39a9f4d84b50f485d8739b7ddca2ded1b0061e7
[INFO] running `"docker" "start" "-a" "4a7baa481d0b36844b29bebee39a9f4d84b50f485d8739b7ddca2ded1b0061e7"`
[INFO] [stderr]    Compiling fraction-code-challenge v0.1.0 (/opt/rustwide/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 0.51s
[INFO] running `"docker" "inspect" "4a7baa481d0b36844b29bebee39a9f4d84b50f485d8739b7ddca2ded1b0061e7"`
[INFO] running `"docker" "rm" "-f" "4a7baa481d0b36844b29bebee39a9f4d84b50f485d8739b7ddca2ded1b0061e7"`
[INFO] [stdout] 4a7baa481d0b36844b29bebee39a9f4d84b50f485d8739b7ddca2ded1b0061e7
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3e2fc66253d9e49bf2e291c5904b6b008033d4059bf41475a07133f1919864c9
[INFO] running `"docker" "start" "-a" "3e2fc66253d9e49bf2e291c5904b6b008033d4059bf41475a07133f1919864c9"`
[INFO] [stderr]    Compiling fraction-code-challenge v0.1.0 (/opt/rustwide/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 0.61s
[INFO] running `"docker" "inspect" "3e2fc66253d9e49bf2e291c5904b6b008033d4059bf41475a07133f1919864c9"`
[INFO] running `"docker" "rm" "-f" "3e2fc66253d9e49bf2e291c5904b6b008033d4059bf41475a07133f1919864c9"`
[INFO] [stdout] 3e2fc66253d9e49bf2e291c5904b6b008033d4059bf41475a07133f1919864c9
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] 5f63a462fb5f61e1822562e59d85c3bab0708ce9d9f5e0a6b5d869f4d1c083b8
[INFO] running `"docker" "start" "-a" "5f63a462fb5f61e1822562e59d85c3bab0708ce9d9f5e0a6b5d869f4d1c083b8"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/fraction_code_challenge-4ade73a437ecfca0
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test fraction::frac::test_fraction_add ... ok
[INFO] [stdout] test fraction::frac::test_fraction_eq ... ok
[INFO] [stdout] test fraction::frac::test_fraction_reduced ... ok
[INFO] [stdout] test fraction::frac::test_fraction_from_str ... ok
[INFO] [stdout] test fraction::frac::test_fraction_sub ... ok
[INFO] [stdout] test fraction::frac::test_fraction_mul ... ok
[INFO] [stdout] test fraction::frac::test_fraction_div ... ok
[INFO] [stdout] test test_evaluate_expression ... ok
[INFO] [stdout] test test_remove_excess_whitespace ... ok
[INFO] [stdout] test fraction::frac::test_pretty_print ... ok
[INFO] [stdout] test fraction::gcd::test_gcd ... 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" "5f63a462fb5f61e1822562e59d85c3bab0708ce9d9f5e0a6b5d869f4d1c083b8"`
[INFO] running `"docker" "rm" "-f" "5f63a462fb5f61e1822562e59d85c3bab0708ce9d9f5e0a6b5d869f4d1c083b8"`
[INFO] [stdout] 5f63a462fb5f61e1822562e59d85c3bab0708ce9d9f5e0a6b5d869f4d1c083b8