[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 1.38.0 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-3/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mebmichael/fraction-code-challenge on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "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-3/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" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 0aea7f5d8af66e3b5014a039645165f90f8dbb5a116d58b437605f46a2987144
[INFO] running `"docker" "start" "-a" "0aea7f5d8af66e3b5014a039645165f90f8dbb5a116d58b437605f46a2987144"`
[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" "0aea7f5d8af66e3b5014a039645165f90f8dbb5a116d58b437605f46a2987144"`
[INFO] running `"docker" "rm" "-f" "0aea7f5d8af66e3b5014a039645165f90f8dbb5a116d58b437605f46a2987144"`
[INFO] [stdout] 0aea7f5d8af66e3b5014a039645165f90f8dbb5a116d58b437605f46a2987144
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/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" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] b9c9b2675c970a89a60e19827da792cb7430105dc12b6bb419d4996bcfa9739e
[INFO] running `"docker" "start" "-a" "b9c9b2675c970a89a60e19827da792cb7430105dc12b6bb419d4996bcfa9739e"`
[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 0.58s
[INFO] running `"docker" "inspect" "b9c9b2675c970a89a60e19827da792cb7430105dc12b6bb419d4996bcfa9739e"`
[INFO] running `"docker" "rm" "-f" "b9c9b2675c970a89a60e19827da792cb7430105dc12b6bb419d4996bcfa9739e"`
[INFO] [stdout] b9c9b2675c970a89a60e19827da792cb7430105dc12b6bb419d4996bcfa9739e
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/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" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] f1560c7ebaeb379912652d78effcc8e78afa0d00bb2295f28fb8389122c16268
[INFO] running `"docker" "start" "-a" "f1560c7ebaeb379912652d78effcc8e78afa0d00bb2295f28fb8389122c16268"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/fraction_code_challenge-8daf00acc2fa0515
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test fraction::frac::test_fraction_div ... ok
[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_from_str ... ok
[INFO] [stdout] test fraction::frac::test_fraction_sub ... ok
[INFO] [stdout] test fraction::frac::test_fraction_reduced ... ok
[INFO] [stdout] test fraction::frac::test_fraction_mul ... ok
[INFO] [stdout] test fraction::frac::test_pretty_print ... ok
[INFO] [stdout] test test_evaluate_expression ... ok
[INFO] [stdout] test fraction::gcd::test_gcd ... ok
[INFO] [stdout] test test_remove_excess_whitespace ... 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" "f1560c7ebaeb379912652d78effcc8e78afa0d00bb2295f28fb8389122c16268"`
[INFO] running `"docker" "rm" "-f" "f1560c7ebaeb379912652d78effcc8e78afa0d00bb2295f28fb8389122c16268"`
[INFO] [stdout] f1560c7ebaeb379912652d78effcc8e78afa0d00bb2295f28fb8389122c16268