[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/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/Miniwoffer/char_count"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/Miniwoffer/char_count'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Miniwoffer/char_count" "work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/Miniwoffer/char_count"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/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 master#1891bfa80364eead426517c68de6947b7692e2de
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Miniwoffer/char_count on toolchain try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "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/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/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/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/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" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Miniwoffer/char_count against try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a for pr-60261
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60261/worker-1/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/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=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" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1c032465743c2bff2aac9ab836a7cca7b7f07da876a9bc908e567a06f7b6e2e2
[INFO] running `"docker" "start" "-a" "1c032465743c2bff2aac9ab836a7cca7b7f07da876a9bc908e567a06f7b6e2e2"`
[INFO] [stderr]     Checking 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] 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 0.48s
[INFO] running `"docker" "inspect" "1c032465743c2bff2aac9ab836a7cca7b7f07da876a9bc908e567a06f7b6e2e2"`
[INFO] running `"docker" "rm" "-f" "1c032465743c2bff2aac9ab836a7cca7b7f07da876a9bc908e567a06f7b6e2e2"`
[INFO] [stdout] 1c032465743c2bff2aac9ab836a7cca7b7f07da876a9bc908e567a06f7b6e2e2