Dec 04 21:33:36.064 INFO checking brandonpollack23/rust_wc against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 21:33:36.064 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-7/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 21:33:36.600 INFO [stdout] 6b6707adf5482fca3024b7bd7846542ef751e4e2208ab2b4fc3bc734053e118b
Dec 04 21:33:36.602 INFO running `"docker" "start" "-a" "6b6707adf5482fca3024b7bd7846542ef751e4e2208ab2b4fc3bc734053e118b"`
Dec 04 21:33:38.691 INFO [stderr] usermod: no changes
Dec 04 21:33:38.846 INFO [stderr]     Checking rust_wc v0.1.0 (/source)
Dec 04 21:33:40.235 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 21:33:40.235 INFO [stderr]   --> src/word_count.rs:35:13
Dec 04 21:33:40.235 INFO [stderr]    |
Dec 04 21:33:40.235 INFO [stderr] 35 |             write!(&mut output, "{} ", self.lines);
Dec 04 21:33:40.235 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 21:33:40.235 INFO [stderr]    |
Dec 04 21:33:40.235 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 21:33:40.235 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 21:33:40.235 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 04 21:33:40.235 INFO [stderr] 
Dec 04 21:33:40.235 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 21:33:40.235 INFO [stderr]   --> src/word_count.rs:38:13
Dec 04 21:33:40.235 INFO [stderr]    |
Dec 04 21:33:40.235 INFO [stderr] 38 |             write!(&mut output, "{} ", self.words);
Dec 04 21:33:40.235 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 21:33:40.235 INFO [stderr]    |
Dec 04 21:33:40.235 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 21:33:40.235 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 04 21:33:40.235 INFO [stderr] 
Dec 04 21:33:40.235 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 21:33:40.235 INFO [stderr]   --> src/word_count.rs:41:13
Dec 04 21:33:40.235 INFO [stderr]    |
Dec 04 21:33:40.235 INFO [stderr] 41 |             write!(&mut output, "{} ", self.bytes);
Dec 04 21:33:40.235 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 21:33:40.235 INFO [stderr]    |
Dec 04 21:33:40.235 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 21:33:40.235 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 04 21:33:40.235 INFO [stderr] 
Dec 04 21:33:40.235 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 21:33:40.235 INFO [stderr]   --> src/word_count.rs:44:13
Dec 04 21:33:40.235 INFO [stderr]    |
Dec 04 21:33:40.235 INFO [stderr] 44 |             write!(&mut output, "{} ", self.chars);
Dec 04 21:33:40.235 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 21:33:40.235 INFO [stderr]    |
Dec 04 21:33:40.235 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 21:33:40.235 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 04 21:33:40.235 INFO [stderr] 
Dec 04 21:33:40.235 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 21:33:40.235 INFO [stderr]   --> src/word_count.rs:47:13
Dec 04 21:33:40.235 INFO [stderr]    |
Dec 04 21:33:40.235 INFO [stderr] 47 |             write!(&mut output, "{} ", self.max_length);
Dec 04 21:33:40.235 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 21:33:40.235 INFO [stderr]    |
Dec 04 21:33:40.235 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 21:33:40.235 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 04 21:33:40.235 INFO [stderr] 
Dec 04 21:33:40.299 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 21:33:40.299 INFO [stderr]   --> src/word_count.rs:35:13
Dec 04 21:33:40.299 INFO [stderr]    |
Dec 04 21:33:40.299 INFO [stderr] 35 |             write!(&mut output, "{} ", self.lines);
Dec 04 21:33:40.299 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 21:33:40.299 INFO [stderr]    |
Dec 04 21:33:40.299 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 21:33:40.299 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 21:33:40.299 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 04 21:33:40.299 INFO [stderr] 
Dec 04 21:33:40.299 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 21:33:40.299 INFO [stderr]   --> src/word_count.rs:38:13
Dec 04 21:33:40.299 INFO [stderr]    |
Dec 04 21:33:40.299 INFO [stderr] 38 |             write!(&mut output, "{} ", self.words);
Dec 04 21:33:40.299 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 21:33:40.299 INFO [stderr]    |
Dec 04 21:33:40.299 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 21:33:40.299 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 04 21:33:40.299 INFO [stderr] 
Dec 04 21:33:40.299 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 21:33:40.299 INFO [stderr]   --> src/word_count.rs:41:13
Dec 04 21:33:40.299 INFO [stderr]    |
Dec 04 21:33:40.299 INFO [stderr] 41 |             write!(&mut output, "{} ", self.bytes);
Dec 04 21:33:40.299 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 21:33:40.299 INFO [stderr]    |
Dec 04 21:33:40.299 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 21:33:40.299 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 04 21:33:40.299 INFO [stderr] 
Dec 04 21:33:40.299 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 21:33:40.299 INFO [stderr]   --> src/word_count.rs:44:13
Dec 04 21:33:40.299 INFO [stderr]    |
Dec 04 21:33:40.299 INFO [stderr] 44 |             write!(&mut output, "{} ", self.chars);
Dec 04 21:33:40.299 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 21:33:40.299 INFO [stderr]    |
Dec 04 21:33:40.299 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 21:33:40.299 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 04 21:33:40.299 INFO [stderr] 
Dec 04 21:33:40.299 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 21:33:40.299 INFO [stderr]   --> src/word_count.rs:47:13
Dec 04 21:33:40.299 INFO [stderr]    |
Dec 04 21:33:40.299 INFO [stderr] 47 |             write!(&mut output, "{} ", self.max_length);
Dec 04 21:33:40.299 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 21:33:40.299 INFO [stderr]    |
Dec 04 21:33:40.299 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 21:33:40.299 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 04 21:33:40.299 INFO [stderr] 
Dec 04 21:33:40.339 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.60s
Dec 04 21:33:40.343 INFO [stderr] su: No module specific data is present
Dec 04 21:33:41.443 INFO running `"docker" "inspect" "6b6707adf5482fca3024b7bd7846542ef751e4e2208ab2b4fc3bc734053e118b"`
Dec 04 21:33:41.676 INFO running `"docker" "rm" "-f" "6b6707adf5482fca3024b7bd7846542ef751e4e2208ab2b4fc3bc734053e118b"`
Dec 04 21:33:41.885 INFO [stdout] 6b6707adf5482fca3024b7bd7846542ef751e4e2208ab2b4fc3bc734053e118b