[INFO] updating cached repository brandonpollack23/rust_wc
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/brandonpollack23/rust_wc
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/brandonpollack23/rust_wc" "work/ex/beta-1.38-1/sources/1.37.0/gh/brandonpollack23/rust_wc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/brandonpollack23/rust_wc'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/brandonpollack23/rust_wc" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/brandonpollack23/rust_wc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/brandonpollack23/rust_wc'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b94d313f8b8987d688f5598d96f55bde61892b80
[INFO] sha for GitHub repo brandonpollack23/rust_wc: b94d313f8b8987d688f5598d96f55bde61892b80
[INFO] validating manifest of brandonpollack23/rust_wc 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 brandonpollack23/rust_wc 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 brandonpollack23/rust_wc
[INFO] finished frobbing brandonpollack23/rust_wc
[INFO] frobbed toml for brandonpollack23/rust_wc written to work/ex/beta-1.38-1/sources/1.37.0/gh/brandonpollack23/rust_wc/Cargo.toml
[INFO] started frobbing brandonpollack23/rust_wc
[INFO] finished frobbing brandonpollack23/rust_wc
[INFO] frobbed toml for brandonpollack23/rust_wc written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/brandonpollack23/rust_wc/Cargo.toml
[INFO] crate brandonpollack23/rust_wc already has a lockfile, it will not be regenerated
[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 brandonpollack23/rust_wc 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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=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] 94197666ddb4c5fbd8bafc1be25b738f05bec8f8df9a69ea59d5f94937a67808
[INFO] running `"docker" "start" "-a" "94197666ddb4c5fbd8bafc1be25b738f05bec8f8df9a69ea59d5f94937a67808"`
[INFO] [stderr]    Compiling rust_wc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/word_count.rs:69:49
[INFO] [stderr]    |
[INFO] [stderr] 69 | fn open(path: &str) -> io::Result<BufReader<Box<Read>>> {
[INFO] [stderr]    |                                                 ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/word_count.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |             write!(&mut output, "{} ", self.lines);
[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] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/word_count.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |             write!(&mut output, "{} ", self.words);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/word_count.rs:41:13
[INFO] [stderr]    |
[INFO] [stderr] 41 |             write!(&mut output, "{} ", self.bytes);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/word_count.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |             write!(&mut output, "{} ", self.chars);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/word_count.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |             write!(&mut output, "{} ", self.max_length);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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 2.50s
[INFO] running `"docker" "inspect" "94197666ddb4c5fbd8bafc1be25b738f05bec8f8df9a69ea59d5f94937a67808"`
[INFO] running `"docker" "rm" "-f" "94197666ddb4c5fbd8bafc1be25b738f05bec8f8df9a69ea59d5f94937a67808"`
[INFO] [stdout] 94197666ddb4c5fbd8bafc1be25b738f05bec8f8df9a69ea59d5f94937a67808
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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=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] 9ea91d226e82afb86f420f148a95af85f1280cb4c10f6a200b0fe7dd5a1eb25e
[INFO] running `"docker" "start" "-a" "9ea91d226e82afb86f420f148a95af85f1280cb4c10f6a200b0fe7dd5a1eb25e"`
[INFO] [stderr]    Compiling rust_wc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/word_count.rs:69:49
[INFO] [stderr]    |
[INFO] [stderr] 69 | fn open(path: &str) -> io::Result<BufReader<Box<Read>>> {
[INFO] [stderr]    |                                                 ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/word_count.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |             write!(&mut output, "{} ", self.lines);
[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] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/word_count.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |             write!(&mut output, "{} ", self.words);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/word_count.rs:41:13
[INFO] [stderr]    |
[INFO] [stderr] 41 |             write!(&mut output, "{} ", self.bytes);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/word_count.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |             write!(&mut output, "{} ", self.chars);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/word_count.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |             write!(&mut output, "{} ", self.max_length);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[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 1.14s
[INFO] running `"docker" "inspect" "9ea91d226e82afb86f420f148a95af85f1280cb4c10f6a200b0fe7dd5a1eb25e"`
[INFO] running `"docker" "rm" "-f" "9ea91d226e82afb86f420f148a95af85f1280cb4c10f6a200b0fe7dd5a1eb25e"`
[INFO] [stdout] 9ea91d226e82afb86f420f148a95af85f1280cb4c10f6a200b0fe7dd5a1eb25e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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=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] 45b26e0dfd9e612219fe51c85382d612311925d45b6adccb0d4566f16d57fd0e
[INFO] running `"docker" "start" "-a" "45b26e0dfd9e612219fe51c85382d612311925d45b6adccb0d4566f16d57fd0e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_wc-c731d15af55811fe
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "45b26e0dfd9e612219fe51c85382d612311925d45b6adccb0d4566f16d57fd0e"`
[INFO] running `"docker" "rm" "-f" "45b26e0dfd9e612219fe51c85382d612311925d45b6adccb0d4566f16d57fd0e"`
[INFO] [stdout] 45b26e0dfd9e612219fe51c85382d612311925d45b6adccb0d4566f16d57fd0e