[INFO] crate flexlint 0.2.4 is already in cache
[INFO] extracting crate flexlint 0.2.4 into work/ex/beta-1.38-1/sources/1.37.0/reg/flexlint/0.2.4
[INFO] extracting crate flexlint 0.2.4 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/flexlint/0.2.4
[INFO] validating manifest of flexlint-0.2.4 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 flexlint-0.2.4 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 flexlint-0.2.4
[INFO] finished frobbing flexlint-0.2.4
[INFO] frobbed toml for flexlint-0.2.4 written to work/ex/beta-1.38-1/sources/1.37.0/reg/flexlint/0.2.4/Cargo.toml
[INFO] started frobbing flexlint-0.2.4
[INFO] finished frobbing flexlint-0.2.4
[INFO] frobbed toml for flexlint-0.2.4 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/flexlint/0.2.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing flexlint-0.2.4 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/flexlint/0.2.4:/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] 34d123cff0ab3f3f5cc6062a6c92021d62e63e0e4869860ce3db637ff25542d0
[INFO] running `"docker" "start" "-a" "34d123cff0ab3f3f5cc6062a6c92021d62e63e0e4869860ce3db637ff25542d0"`
[INFO] [stderr]    Compiling winapi v0.3.7
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling approx v0.1.1
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling rgb v0.8.14
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]    Compiling structopt v0.2.18
[INFO] [stderr]    Compiling winconsole v0.10.0
[INFO] [stderr]    Compiling colored v1.8.0
[INFO] [stderr]    Compiling flexlint v0.2.4 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/printer.rs:127:13
[INFO] [stderr]     |
[INFO] [stderr] 127 |             write!(term, "{}", dat);
[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 19.31s
[INFO] running `"docker" "inspect" "34d123cff0ab3f3f5cc6062a6c92021d62e63e0e4869860ce3db637ff25542d0"`
[INFO] running `"docker" "rm" "-f" "34d123cff0ab3f3f5cc6062a6c92021d62e63e0e4869860ce3db637ff25542d0"`
[INFO] [stdout] 34d123cff0ab3f3f5cc6062a6c92021d62e63e0e4869860ce3db637ff25542d0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/flexlint/0.2.4:/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] 74e220107fe3178671da3f0beea1df6f1c979cefe38ba3a0912223fc3ddb6e59
[INFO] running `"docker" "start" "-a" "74e220107fe3178671da3f0beea1df6f1c979cefe38ba3a0912223fc3ddb6e59"`
[INFO] [stderr]    Compiling flexlint v0.2.4 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/printer.rs:127:13
[INFO] [stderr]     |
[INFO] [stderr] 127 |             write!(term, "{}", dat);
[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 4.18s
[INFO] running `"docker" "inspect" "74e220107fe3178671da3f0beea1df6f1c979cefe38ba3a0912223fc3ddb6e59"`
[INFO] running `"docker" "rm" "-f" "74e220107fe3178671da3f0beea1df6f1c979cefe38ba3a0912223fc3ddb6e59"`
[INFO] [stdout] 74e220107fe3178671da3f0beea1df6f1c979cefe38ba3a0912223fc3ddb6e59
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/flexlint/0.2.4:/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] 4c7c50e14704287d0532c6a960772870f50c845da67fd970692b29e33074062f
[INFO] running `"docker" "start" "-a" "4c7c50e14704287d0532c6a960772870f50c845da67fd970692b29e33074062f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/flexlint-a91c76bb698736ff
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test lint::tests::test_deserialize_ruleset ... ok
[INFO] [stdout] test lint::tests::test_gen_ignore ... ok
[INFO] [stdout] test printer::tests::test_collect_by_path ... ok
[INFO] [stdout] test lint::tests::test_gen_checked_with_forbidden ... ok
[INFO] [stdout] test lint::tests::test_gen_checked_with_required ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "4c7c50e14704287d0532c6a960772870f50c845da67fd970692b29e33074062f"`
[INFO] running `"docker" "rm" "-f" "4c7c50e14704287d0532c6a960772870f50c845da67fd970692b29e33074062f"`
[INFO] [stdout] 4c7c50e14704287d0532c6a960772870f50c845da67fd970692b29e33074062f