Dec 19 19:35:38.509 INFO checking brandonpollack23/rust_wc against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 19:35:38.509 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 19:35:39.119 INFO [stdout] 7f99bc9271e9fda1a5c034f45d13ee28d0eca73b7ac73fb342e121034d3dc45c
Dec 19 19:35:39.123 INFO running `"docker" "start" "-a" "7f99bc9271e9fda1a5c034f45d13ee28d0eca73b7ac73fb342e121034d3dc45c"`
Dec 19 19:35:41.091 INFO [stderr]     Checking rust_wc v0.1.0 (/opt/crater/workdir)
Dec 19 19:35:41.738 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:35:41.738 INFO [stderr]   --> src/word_count.rs:35:13
Dec 19 19:35:41.738 INFO [stderr]    |
Dec 19 19:35:41.738 INFO [stderr] 35 |             write!(&mut output, "{} ", self.lines);
Dec 19 19:35:41.738 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:35:41.738 INFO [stderr]    |
Dec 19 19:35:41.738 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 19:35:41.738 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:35:41.738 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 19 19:35:41.738 INFO [stderr] 
Dec 19 19:35:41.738 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:35:41.738 INFO [stderr]   --> src/word_count.rs:38:13
Dec 19 19:35:41.738 INFO [stderr]    |
Dec 19 19:35:41.738 INFO [stderr] 38 |             write!(&mut output, "{} ", self.words);
Dec 19 19:35:41.738 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:35:41.738 INFO [stderr]    |
Dec 19 19:35:41.738 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:35:41.738 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 19 19:35:41.738 INFO [stderr] 
Dec 19 19:35:41.738 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:35:41.738 INFO [stderr]   --> src/word_count.rs:41:13
Dec 19 19:35:41.738 INFO [stderr]    |
Dec 19 19:35:41.738 INFO [stderr] 41 |             write!(&mut output, "{} ", self.bytes);
Dec 19 19:35:41.738 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:35:41.738 INFO [stderr]    |
Dec 19 19:35:41.738 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:35:41.738 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 19 19:35:41.738 INFO [stderr] 
Dec 19 19:35:41.738 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:35:41.738 INFO [stderr]   --> src/word_count.rs:44:13
Dec 19 19:35:41.738 INFO [stderr]    |
Dec 19 19:35:41.738 INFO [stderr] 44 |             write!(&mut output, "{} ", self.chars);
Dec 19 19:35:41.738 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:35:41.738 INFO [stderr]    |
Dec 19 19:35:41.738 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:35:41.738 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 19 19:35:41.738 INFO [stderr] 
Dec 19 19:35:41.739 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:35:41.739 INFO [stderr]   --> src/word_count.rs:47:13
Dec 19 19:35:41.739 INFO [stderr]    |
Dec 19 19:35:41.739 INFO [stderr] 47 |             write!(&mut output, "{} ", self.max_length);
Dec 19 19:35:41.739 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:35:41.739 INFO [stderr]    |
Dec 19 19:35:41.739 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:35:41.739 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 19 19:35:41.739 INFO [stderr] 
Dec 19 19:35:41.739 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:35:41.739 INFO [stderr]   --> src/word_count.rs:35:13
Dec 19 19:35:41.739 INFO [stderr]    |
Dec 19 19:35:41.739 INFO [stderr] 35 |             write!(&mut output, "{} ", self.lines);
Dec 19 19:35:41.739 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:35:41.739 INFO [stderr]    |
Dec 19 19:35:41.739 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 19:35:41.739 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:35:41.739 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 19 19:35:41.739 INFO [stderr] 
Dec 19 19:35:41.739 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:35:41.739 INFO [stderr]   --> src/word_count.rs:38:13
Dec 19 19:35:41.739 INFO [stderr]    |
Dec 19 19:35:41.739 INFO [stderr] 38 |             write!(&mut output, "{} ", self.words);
Dec 19 19:35:41.739 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:35:41.740 INFO [stderr]    |
Dec 19 19:35:41.740 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:35:41.740 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 19 19:35:41.740 INFO [stderr] 
Dec 19 19:35:41.740 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:35:41.740 INFO [stderr]   --> src/word_count.rs:41:13
Dec 19 19:35:41.740 INFO [stderr]    |
Dec 19 19:35:41.740 INFO [stderr] 41 |             write!(&mut output, "{} ", self.bytes);
Dec 19 19:35:41.741 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:35:41.741 INFO [stderr]    |
Dec 19 19:35:41.741 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:35:41.741 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 19 19:35:41.741 INFO [stderr] 
Dec 19 19:35:41.741 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:35:41.741 INFO [stderr]   --> src/word_count.rs:44:13
Dec 19 19:35:41.741 INFO [stderr]    |
Dec 19 19:35:41.741 INFO [stderr] 44 |             write!(&mut output, "{} ", self.chars);
Dec 19 19:35:41.741 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:35:41.741 INFO [stderr]    |
Dec 19 19:35:41.741 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:35:41.741 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 19 19:35:41.741 INFO [stderr] 
Dec 19 19:35:41.741 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 19:35:41.741 INFO [stderr]   --> src/word_count.rs:47:13
Dec 19 19:35:41.741 INFO [stderr]    |
Dec 19 19:35:41.741 INFO [stderr] 47 |             write!(&mut output, "{} ", self.max_length);
Dec 19 19:35:41.741 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:35:41.742 INFO [stderr]    |
Dec 19 19:35:41.744 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 19:35:41.744 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 19 19:35:41.744 INFO [stderr] 
Dec 19 19:35:41.776 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
Dec 19 19:35:42.559 INFO running `"docker" "inspect" "7f99bc9271e9fda1a5c034f45d13ee28d0eca73b7ac73fb342e121034d3dc45c"`
Dec 19 19:35:42.848 INFO running `"docker" "rm" "-f" "7f99bc9271e9fda1a5c034f45d13ee28d0eca73b7ac73fb342e121034d3dc45c"`
Dec 19 19:35:43.180 INFO [stdout] 7f99bc9271e9fda1a5c034f45d13ee28d0eca73b7ac73fb342e121034d3dc45c