[INFO] updating cached repository Miniwoffer/char_count
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Miniwoffer/char_count
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Miniwoffer/char_count" "work/ex/beta-1.38-1/sources/1.37.0/gh/Miniwoffer/char_count"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Miniwoffer/char_count'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Miniwoffer/char_count" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Miniwoffer/char_count"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Miniwoffer/char_count'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 11fdfc45b5b6383f65e92ac8f94edc072350518e
[INFO] sha for GitHub repo Miniwoffer/char_count: 11fdfc45b5b6383f65e92ac8f94edc072350518e
[INFO] validating manifest of Miniwoffer/char_count 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 Miniwoffer/char_count 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 Miniwoffer/char_count
[INFO] finished frobbing Miniwoffer/char_count
[INFO] frobbed toml for Miniwoffer/char_count written to work/ex/beta-1.38-1/sources/1.37.0/gh/Miniwoffer/char_count/Cargo.toml
[INFO] started frobbing Miniwoffer/char_count
[INFO] finished frobbing Miniwoffer/char_count
[INFO] frobbed toml for Miniwoffer/char_count written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Miniwoffer/char_count/Cargo.toml
[INFO] crate Miniwoffer/char_count 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 Miniwoffer/char_count 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Miniwoffer/char_count:/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] 91e69026876cbcdad90bc1df7c072fbdcef3dc2ed13d6b204f24d70fa912c370
[INFO] running `"docker" "start" "-a" "91e69026876cbcdad90bc1df7c072fbdcef3dc2ed13d6b204f24d70fa912c370"`
[INFO] [stderr]    Compiling char_count v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `ac`
[INFO] [stderr]   --> src/main.rs:13:35
[INFO] [stderr]    |
[INFO] [stderr] 13 |     sorted_vec.sort_unstable_by(|(ac,ai),(bc,bi)| bi.cmp(ai));
[INFO] [stderr]    |                                   ^^ help: consider prefixing with an underscore: `_ac`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `bc`
[INFO] [stderr]   --> src/main.rs:13:43
[INFO] [stderr]    |
[INFO] [stderr] 13 |     sorted_vec.sort_unstable_by(|(ac,ai),(bc,bi)| bi.cmp(ai));
[INFO] [stderr]    |                                           ^^ help: consider prefixing with an underscore: `_bc`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     io::stdin().read_to_string(&mut buffer);
[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] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `"docker" "inspect" "91e69026876cbcdad90bc1df7c072fbdcef3dc2ed13d6b204f24d70fa912c370"`
[INFO] running `"docker" "rm" "-f" "91e69026876cbcdad90bc1df7c072fbdcef3dc2ed13d6b204f24d70fa912c370"`
[INFO] [stdout] 91e69026876cbcdad90bc1df7c072fbdcef3dc2ed13d6b204f24d70fa912c370
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Miniwoffer/char_count:/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] 7aa84335a546b4bd941ce9d2dd947685b21f36ad85159ff466dfd0558dbdb8e7
[INFO] running `"docker" "start" "-a" "7aa84335a546b4bd941ce9d2dd947685b21f36ad85159ff466dfd0558dbdb8e7"`
[INFO] [stderr]    Compiling char_count v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `ac`
[INFO] [stderr]   --> src/main.rs:13:35
[INFO] [stderr]    |
[INFO] [stderr] 13 |     sorted_vec.sort_unstable_by(|(ac,ai),(bc,bi)| bi.cmp(ai));
[INFO] [stderr]    |                                   ^^ help: consider prefixing with an underscore: `_ac`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `bc`
[INFO] [stderr]   --> src/main.rs:13:43
[INFO] [stderr]    |
[INFO] [stderr] 13 |     sorted_vec.sort_unstable_by(|(ac,ai),(bc,bi)| bi.cmp(ai));
[INFO] [stderr]    |                                           ^^ help: consider prefixing with an underscore: `_bc`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     io::stdin().read_to_string(&mut buffer);
[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] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `"docker" "inspect" "7aa84335a546b4bd941ce9d2dd947685b21f36ad85159ff466dfd0558dbdb8e7"`
[INFO] running `"docker" "rm" "-f" "7aa84335a546b4bd941ce9d2dd947685b21f36ad85159ff466dfd0558dbdb8e7"`
[INFO] [stdout] 7aa84335a546b4bd941ce9d2dd947685b21f36ad85159ff466dfd0558dbdb8e7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Miniwoffer/char_count:/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] 612e16ae47065f21b276afce52fe07a1a0eae16ff677fd54b08d73d6c80fc81d
[INFO] running `"docker" "start" "-a" "612e16ae47065f21b276afce52fe07a1a0eae16ff677fd54b08d73d6c80fc81d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/char_count-6e0d109be6b64b10
[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" "612e16ae47065f21b276afce52fe07a1a0eae16ff677fd54b08d73d6c80fc81d"`
[INFO] running `"docker" "rm" "-f" "612e16ae47065f21b276afce52fe07a1a0eae16ff677fd54b08d73d6c80fc81d"`
[INFO] [stdout] 612e16ae47065f21b276afce52fe07a1a0eae16ff677fd54b08d73d6c80fc81d