[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 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-1/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/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] dfbd428d6e2ba85d2e2ada3211cec6a65541a2d94f14a7f0ee3ce6b5166ec717
[INFO] running `"docker" "start" "-a" "dfbd428d6e2ba85d2e2ada3211cec6a65541a2d94f14a7f0ee3ce6b5166ec717"`
[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 1.08s
[INFO] running `"docker" "inspect" "dfbd428d6e2ba85d2e2ada3211cec6a65541a2d94f14a7f0ee3ce6b5166ec717"`
[INFO] running `"docker" "rm" "-f" "dfbd428d6e2ba85d2e2ada3211cec6a65541a2d94f14a7f0ee3ce6b5166ec717"`
[INFO] [stdout] dfbd428d6e2ba85d2e2ada3211cec6a65541a2d94f14a7f0ee3ce6b5166ec717
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/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/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 39f61c41139773fb802800520046ea1a44496155598018840ed184c30c512ebc
[INFO] running `"docker" "start" "-a" "39f61c41139773fb802800520046ea1a44496155598018840ed184c30c512ebc"`
[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 1.14s
[INFO] running `"docker" "inspect" "39f61c41139773fb802800520046ea1a44496155598018840ed184c30c512ebc"`
[INFO] running `"docker" "rm" "-f" "39f61c41139773fb802800520046ea1a44496155598018840ed184c30c512ebc"`
[INFO] [stdout] 39f61c41139773fb802800520046ea1a44496155598018840ed184c30c512ebc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/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/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] b62775383095d74748014299ee281ccd1926288a453a1b6afef643f57e10cb58
[INFO] running `"docker" "start" "-a" "b62775383095d74748014299ee281ccd1926288a453a1b6afef643f57e10cb58"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/fraction_code_challenge-ce0fbded3959ed0d
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test fraction::frac::test_fraction_add ... ok
[INFO] [stdout] test fraction::frac::test_fraction_mul ... ok
[INFO] [stdout] test fraction::frac::test_fraction_reduced ... ok
[INFO] [stdout] test fraction::gcd::test_gcd ... ok
[INFO] [stdout] test test_remove_excess_whitespace ... ok
[INFO] [stdout] test test_evaluate_expression ... ok
[INFO] [stdout] test fraction::frac::test_fraction_sub ... ok
[INFO] [stdout] test fraction::frac::test_fraction_div ... ok
[INFO] [stdout] test fraction::frac::test_fraction_eq ... ok
[INFO] [stdout] test fraction::frac::test_pretty_print ... ok
[INFO] [stdout] test fraction::frac::test_fraction_from_str ... 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" "b62775383095d74748014299ee281ccd1926288a453a1b6afef643f57e10cb58"`
[INFO] running `"docker" "rm" "-f" "b62775383095d74748014299ee281ccd1926288a453a1b6afef643f57e10cb58"`
[INFO] [stdout] b62775383095d74748014299ee281ccd1926288a453a1b6afef643f57e10cb58