[INFO] crate tacoda_grrs 0.1.0 is already in cache
[INFO] extracting crate tacoda_grrs 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/tacoda_grrs/0.1.0
[INFO] extracting crate tacoda_grrs 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/tacoda_grrs/0.1.0
[INFO] validating manifest of tacoda_grrs-0.1.0 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 tacoda_grrs-0.1.0 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 tacoda_grrs-0.1.0
[INFO] finished frobbing tacoda_grrs-0.1.0
[INFO] frobbed toml for tacoda_grrs-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/tacoda_grrs/0.1.0/Cargo.toml
[INFO] started frobbing tacoda_grrs-0.1.0
[INFO] finished frobbing tacoda_grrs-0.1.0
[INFO] frobbed toml for tacoda_grrs-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/tacoda_grrs/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 tacoda_grrs-0.1.0 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/tacoda_grrs/0.1.0:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 75ed56e985960f7dcd756466ad0010d5faf0cc07a6a9dd26087efa526d9775db
[INFO] running `"docker" "start" "-a" "75ed56e985960f7dcd756466ad0010d5faf0cc07a6a9dd26087efa526d9775db"`
[INFO] [stderr]    Compiling exitfailure v0.5.1
[INFO] [stderr]    Compiling assert_cmd v0.11.1
[INFO] [stderr]    Compiling tacoda_grrs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/lib.rs:4:13
[INFO] [stderr]   |
[INFO] [stderr] 4 |             writeln!(writer, "{}", line);
[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]   = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.30s
[INFO] running `"docker" "inspect" "75ed56e985960f7dcd756466ad0010d5faf0cc07a6a9dd26087efa526d9775db"`
[INFO] running `"docker" "rm" "-f" "75ed56e985960f7dcd756466ad0010d5faf0cc07a6a9dd26087efa526d9775db"`
[INFO] [stdout] 75ed56e985960f7dcd756466ad0010d5faf0cc07a6a9dd26087efa526d9775db
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/tacoda_grrs/0.1.0:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] ca3a2c144bd38451521260f7bc0417efc10a8911e2e6072c4c3099fc1a4eab59
[INFO] running `"docker" "start" "-a" "ca3a2c144bd38451521260f7bc0417efc10a8911e2e6072c4c3099fc1a4eab59"`
[INFO] [stderr]    Compiling tacoda_grrs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/lib.rs:4:13
[INFO] [stderr]   |
[INFO] [stderr] 4 |             writeln!(writer, "{}", line);
[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]   = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `"docker" "inspect" "ca3a2c144bd38451521260f7bc0417efc10a8911e2e6072c4c3099fc1a4eab59"`
[INFO] running `"docker" "rm" "-f" "ca3a2c144bd38451521260f7bc0417efc10a8911e2e6072c4c3099fc1a4eab59"`
[INFO] [stdout] ca3a2c144bd38451521260f7bc0417efc10a8911e2e6072c4c3099fc1a4eab59
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/tacoda_grrs/0.1.0:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 0d8913f6323bdcd87e0490b72df4e98acbdcacf2e11d6d5f87f28527c5e409b6
[INFO] running `"docker" "start" "-a" "0d8913f6323bdcd87e0490b72df4e98acbdcacf2e11d6d5f87f28527c5e409b6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tacoda_grrs-cf4d1aadadfb4891
[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] [stderr]      Running /opt/crater/target/debug/deps/tacoda_grrs-ed5202c01cbf4a9b
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test find_a_match ... ok
[INFO] [stdout] test check_answer_validity ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cli-59c253f90b66ce3f
[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] [stderr]    Doc-tests tacoda_grrs
[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" "0d8913f6323bdcd87e0490b72df4e98acbdcacf2e11d6d5f87f28527c5e409b6"`
[INFO] running `"docker" "rm" "-f" "0d8913f6323bdcd87e0490b72df4e98acbdcacf2e11d6d5f87f28527c5e409b6"`
[INFO] [stdout] 0d8913f6323bdcd87e0490b72df4e98acbdcacf2e11d6d5f87f28527c5e409b6