Dec 11 21:30:06.129 INFO checking brandonpollack23/rust_wc against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 21:30:06.130 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-4/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 11 21:30:06.548 INFO [stdout] 0d7c562e61971bdc61e2448573911c1b5f44418b9da9a4f8102c3ec5418aa84b
Dec 11 21:30:06.551 INFO running `"docker" "start" "-a" "0d7c562e61971bdc61e2448573911c1b5f44418b9da9a4f8102c3ec5418aa84b"`
Dec 11 21:30:08.282 INFO [stderr] usermod: no changes
Dec 11 21:30:08.384 INFO [stderr]     Checking rust_wc v0.1.0 (/source)
Dec 11 21:30:09.856 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 21:30:09.856 INFO [stderr]   --> src/word_count.rs:35:13
Dec 11 21:30:09.856 INFO [stderr]    |
Dec 11 21:30:09.856 INFO [stderr] 35 |             write!(&mut output, "{} ", self.lines);
Dec 11 21:30:09.856 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 21:30:09.856 INFO [stderr]    |
Dec 11 21:30:09.856 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 21:30:09.856 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 21:30:09.856 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 11 21:30:09.856 INFO [stderr] 
Dec 11 21:30:09.856 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 21:30:09.856 INFO [stderr]   --> src/word_count.rs:38:13
Dec 11 21:30:09.856 INFO [stderr]    |
Dec 11 21:30:09.857 INFO [stderr] 38 |             write!(&mut output, "{} ", self.words);
Dec 11 21:30:09.857 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 21:30:09.857 INFO [stderr]    |
Dec 11 21:30:09.857 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 21:30:09.857 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 11 21:30:09.857 INFO [stderr] 
Dec 11 21:30:09.857 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 21:30:09.857 INFO [stderr]   --> src/word_count.rs:41:13
Dec 11 21:30:09.857 INFO [stderr]    |
Dec 11 21:30:09.857 INFO [stderr] 41 |             write!(&mut output, "{} ", self.bytes);
Dec 11 21:30:09.857 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 21:30:09.857 INFO [stderr]    |
Dec 11 21:30:09.857 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 21:30:09.857 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 11 21:30:09.857 INFO [stderr] 
Dec 11 21:30:09.857 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 21:30:09.857 INFO [stderr]   --> src/word_count.rs:44:13
Dec 11 21:30:09.857 INFO [stderr]    |
Dec 11 21:30:09.857 INFO [stderr] 44 |             write!(&mut output, "{} ", self.chars);
Dec 11 21:30:09.857 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 21:30:09.857 INFO [stderr]    |
Dec 11 21:30:09.857 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 21:30:09.857 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 11 21:30:09.857 INFO [stderr] 
Dec 11 21:30:09.857 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 21:30:09.857 INFO [stderr]   --> src/word_count.rs:47:13
Dec 11 21:30:09.857 INFO [stderr]    |
Dec 11 21:30:09.857 INFO [stderr] 47 |             write!(&mut output, "{} ", self.max_length);
Dec 11 21:30:09.857 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 21:30:09.857 INFO [stderr]    |
Dec 11 21:30:09.857 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 21:30:09.857 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 11 21:30:09.857 INFO [stderr] 
Dec 11 21:30:10.031 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 21:30:10.031 INFO [stderr]   --> src/word_count.rs:35:13
Dec 11 21:30:10.031 INFO [stderr]    |
Dec 11 21:30:10.031 INFO [stderr] 35 |             write!(&mut output, "{} ", self.lines);
Dec 11 21:30:10.031 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 21:30:10.031 INFO [stderr]    |
Dec 11 21:30:10.031 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 11 21:30:10.031 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 21:30:10.031 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 11 21:30:10.031 INFO [stderr] 
Dec 11 21:30:10.031 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 21:30:10.031 INFO [stderr]   --> src/word_count.rs:38:13
Dec 11 21:30:10.031 INFO [stderr]    |
Dec 11 21:30:10.031 INFO [stderr] 38 |             write!(&mut output, "{} ", self.words);
Dec 11 21:30:10.031 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 21:30:10.031 INFO [stderr]    |
Dec 11 21:30:10.031 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 21:30:10.031 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 11 21:30:10.031 INFO [stderr] 
Dec 11 21:30:10.031 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 21:30:10.031 INFO [stderr]   --> src/word_count.rs:41:13
Dec 11 21:30:10.031 INFO [stderr]    |
Dec 11 21:30:10.031 INFO [stderr] 41 |             write!(&mut output, "{} ", self.bytes);
Dec 11 21:30:10.031 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 21:30:10.031 INFO [stderr]    |
Dec 11 21:30:10.031 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 21:30:10.031 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 11 21:30:10.031 INFO [stderr] 
Dec 11 21:30:10.031 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 21:30:10.031 INFO [stderr]   --> src/word_count.rs:44:13
Dec 11 21:30:10.031 INFO [stderr]    |
Dec 11 21:30:10.031 INFO [stderr] 44 |             write!(&mut output, "{} ", self.chars);
Dec 11 21:30:10.031 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 21:30:10.031 INFO [stderr]    |
Dec 11 21:30:10.032 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 21:30:10.032 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 11 21:30:10.032 INFO [stderr] 
Dec 11 21:30:10.032 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 11 21:30:10.032 INFO [stderr]   --> src/word_count.rs:47:13
Dec 11 21:30:10.032 INFO [stderr]    |
Dec 11 21:30:10.032 INFO [stderr] 47 |             write!(&mut output, "{} ", self.max_length);
Dec 11 21:30:10.032 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 21:30:10.032 INFO [stderr]    |
Dec 11 21:30:10.032 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 11 21:30:10.032 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 11 21:30:10.032 INFO [stderr] 
Dec 11 21:30:10.056 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.75s
Dec 11 21:30:10.066 INFO [stderr] su: No module specific data is present
Dec 11 21:30:10.806 INFO running `"docker" "inspect" "0d7c562e61971bdc61e2448573911c1b5f44418b9da9a4f8102c3ec5418aa84b"`
Dec 11 21:30:10.987 INFO running `"docker" "rm" "-f" "0d7c562e61971bdc61e2448573911c1b5f44418b9da9a4f8102c3ec5418aa84b"`
Dec 11 21:30:11.213 INFO [stdout] 0d7c562e61971bdc61e2448573911c1b5f44418b9da9a4f8102c3ec5418aa84b