Dec 18 03:01:59.347 INFO checking brandonpollack23/rust_wc against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 03:01:59.347 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/brandonpollack23/rust_wc:/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=forbid" "-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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 03:01:59.866 INFO [stdout] 81c9c6246d88eb327365e9a405a2c031f0119c05199ef953763e254e8b79a26a
Dec 18 03:01:59.868 INFO running `"docker" "start" "-a" "81c9c6246d88eb327365e9a405a2c031f0119c05199ef953763e254e8b79a26a"`
Dec 18 03:02:01.426 INFO [stderr]     Checking clap v2.32.0
Dec 18 03:02:06.736 INFO [stderr]     Checking rust_wc v0.1.0 (/opt/crater/workdir)
Dec 18 03:02:07.232 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:02:07.232 INFO [stderr]   --> src/word_count.rs:35:13
Dec 18 03:02:07.232 INFO [stderr]    |
Dec 18 03:02:07.232 INFO [stderr] 35 |             write!(&mut output, "{} ", self.lines);
Dec 18 03:02:07.232 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:02:07.232 INFO [stderr]    |
Dec 18 03:02:07.232 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 03:02:07.232 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:02:07.232 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 03:02:07.232 INFO [stderr] 
Dec 18 03:02:07.232 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:02:07.232 INFO [stderr]   --> src/word_count.rs:38:13
Dec 18 03:02:07.232 INFO [stderr]    |
Dec 18 03:02:07.232 INFO [stderr] 38 |             write!(&mut output, "{} ", self.words);
Dec 18 03:02:07.232 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:02:07.232 INFO [stderr]    |
Dec 18 03:02:07.232 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:02:07.232 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 03:02:07.232 INFO [stderr] 
Dec 18 03:02:07.232 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:02:07.232 INFO [stderr]   --> src/word_count.rs:41:13
Dec 18 03:02:07.232 INFO [stderr]    |
Dec 18 03:02:07.232 INFO [stderr] 41 |             write!(&mut output, "{} ", self.bytes);
Dec 18 03:02:07.232 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:02:07.232 INFO [stderr]    |
Dec 18 03:02:07.232 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:02:07.232 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 03:02:07.232 INFO [stderr] 
Dec 18 03:02:07.232 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:02:07.232 INFO [stderr]   --> src/word_count.rs:44:13
Dec 18 03:02:07.232 INFO [stderr]    |
Dec 18 03:02:07.232 INFO [stderr] 44 |             write!(&mut output, "{} ", self.chars);
Dec 18 03:02:07.232 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:02:07.232 INFO [stderr]    |
Dec 18 03:02:07.232 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:02:07.232 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 03:02:07.232 INFO [stderr] 
Dec 18 03:02:07.232 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:02:07.232 INFO [stderr]   --> src/word_count.rs:47:13
Dec 18 03:02:07.232 INFO [stderr]    |
Dec 18 03:02:07.232 INFO [stderr] 47 |             write!(&mut output, "{} ", self.max_length);
Dec 18 03:02:07.232 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:02:07.232 INFO [stderr]    |
Dec 18 03:02:07.233 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:02:07.233 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 03:02:07.233 INFO [stderr] 
Dec 18 03:02:07.336 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:02:07.336 INFO [stderr]   --> src/word_count.rs:35:13
Dec 18 03:02:07.336 INFO [stderr]    |
Dec 18 03:02:07.336 INFO [stderr] 35 |             write!(&mut output, "{} ", self.lines);
Dec 18 03:02:07.336 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:02:07.336 INFO [stderr]    |
Dec 18 03:02:07.336 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 03:02:07.336 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:02:07.336 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 03:02:07.336 INFO [stderr] 
Dec 18 03:02:07.336 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:02:07.336 INFO [stderr]   --> src/word_count.rs:38:13
Dec 18 03:02:07.336 INFO [stderr]    |
Dec 18 03:02:07.336 INFO [stderr] 38 |             write!(&mut output, "{} ", self.words);
Dec 18 03:02:07.336 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:02:07.336 INFO [stderr]    |
Dec 18 03:02:07.336 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:02:07.336 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 03:02:07.336 INFO [stderr] 
Dec 18 03:02:07.336 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:02:07.336 INFO [stderr]   --> src/word_count.rs:41:13
Dec 18 03:02:07.336 INFO [stderr]    |
Dec 18 03:02:07.336 INFO [stderr] 41 |             write!(&mut output, "{} ", self.bytes);
Dec 18 03:02:07.336 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:02:07.336 INFO [stderr]    |
Dec 18 03:02:07.336 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:02:07.336 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 03:02:07.336 INFO [stderr] 
Dec 18 03:02:07.336 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:02:07.336 INFO [stderr]   --> src/word_count.rs:44:13
Dec 18 03:02:07.336 INFO [stderr]    |
Dec 18 03:02:07.336 INFO [stderr] 44 |             write!(&mut output, "{} ", self.chars);
Dec 18 03:02:07.336 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:02:07.336 INFO [stderr]    |
Dec 18 03:02:07.336 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:02:07.336 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 03:02:07.336 INFO [stderr] 
Dec 18 03:02:07.336 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:02:07.336 INFO [stderr]   --> src/word_count.rs:47:13
Dec 18 03:02:07.336 INFO [stderr]    |
Dec 18 03:02:07.336 INFO [stderr] 47 |             write!(&mut output, "{} ", self.max_length);
Dec 18 03:02:07.336 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:02:07.336 INFO [stderr]    |
Dec 18 03:02:07.336 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:02:07.336 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 03:02:07.336 INFO [stderr] 
Dec 18 03:02:07.394 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.03s
Dec 18 03:02:08.066 INFO running `"docker" "inspect" "81c9c6246d88eb327365e9a405a2c031f0119c05199ef953763e254e8b79a26a"`
Dec 18 03:02:08.314 INFO running `"docker" "rm" "-f" "81c9c6246d88eb327365e9a405a2c031f0119c05199ef953763e254e8b79a26a"`
Dec 18 03:02:08.571 INFO [stdout] 81c9c6246d88eb327365e9a405a2c031f0119c05199ef953763e254e8b79a26a