[INFO] cloning repository dgoetsch/glutton
[INFO] running `"git" "clone" "--bare" "git://github.com/dgoetsch/glutton.git" "work/cache/sources/gh/dgoetsch/glutton"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/dgoetsch/glutton'...
[INFO] running `"git" "clone" "work/cache/sources/gh/dgoetsch/glutton" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/dgoetsch/glutton"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/dgoetsch/glutton'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dgoetsch/glutton" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/dgoetsch/glutton"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/dgoetsch/glutton'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b1bc70e964c18f6818a90b4e4ff98afa54c907a9
[INFO] sha for GitHub repo dgoetsch/glutton: b1bc70e964c18f6818a90b4e4ff98afa54c907a9
[INFO] validating manifest of dgoetsch/glutton on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dgoetsch/glutton on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing dgoetsch/glutton
[INFO] finished frobbing dgoetsch/glutton
[INFO] frobbed toml for dgoetsch/glutton written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/dgoetsch/glutton/Cargo.toml
[INFO] started frobbing dgoetsch/glutton
[INFO] finished frobbing dgoetsch/glutton
[INFO] frobbed toml for dgoetsch/glutton written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/dgoetsch/glutton/Cargo.toml
[INFO] crate dgoetsch/glutton has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking dgoetsch/glutton against master#c0086b9e8972fef9fd4af24bae20d45021ed06c6 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-1/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/dgoetsch/glutton:/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" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9964ef1b46413d26fe51b866ade4a073c3d2f1ddc0b6df12ce6a78b77f159b6c
[INFO] running `"docker" "start" "-a" "9964ef1b46413d26fe51b866ade4a073c3d2f1ddc0b6df12ce6a78b77f159b6c"`
[INFO] [stderr]     Checking rust-by-ex v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::iter::Map`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::iter::Map;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/main.rs:18:21
[INFO] [stderr]    |
[INFO] [stderr] 18 |         for idx in  (0..self.at_a_time) {
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'rand::Rng::gen_ascii_chars': use sample_iter(&Alphanumeric) instead
[INFO] [stderr]   --> src/main.rs:32:33
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let name = thread_rng().gen_ascii_chars().take(10) .collect::<String>();
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `idx`
[INFO] [stderr]   --> src/main.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |         for idx in  (0..self.at_a_time) {
[INFO] [stderr]    |             ^^^ help: consider prefixing with an underscore: `_idx`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cd_res`
[INFO] [stderr]   --> src/main.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |         let cd_res = std::fs::create_dir_all(sub_dir.as_str());
[INFO] [stderr]    |             ^^^^^^ help: consider prefixing with an underscore: `_cd_res`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cf_res`
[INFO] [stderr]   --> src/main.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 |         let cf_res = std::fs::File::create(file_name.as_str())
[INFO] [stderr]    |             ^^^^^^ help: consider prefixing with an underscore: `_cf_res`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |             handler.join();
[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 import: `std::iter::Map`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::iter::Map;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/main.rs:18:21
[INFO] [stderr]    |
[INFO] [stderr] 18 |         for idx in  (0..self.at_a_time) {
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'rand::Rng::gen_ascii_chars': use sample_iter(&Alphanumeric) instead
[INFO] [stderr]   --> src/main.rs:32:33
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let name = thread_rng().gen_ascii_chars().take(10) .collect::<String>();
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `idx`
[INFO] [stderr]   --> src/main.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |         for idx in  (0..self.at_a_time) {
[INFO] [stderr]    |             ^^^ help: consider prefixing with an underscore: `_idx`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cd_res`
[INFO] [stderr]   --> src/main.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |         let cd_res = std::fs::create_dir_all(sub_dir.as_str());
[INFO] [stderr]    |             ^^^^^^ help: consider prefixing with an underscore: `_cd_res`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cf_res`
[INFO] [stderr]   --> src/main.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 |         let cf_res = std::fs::File::create(file_name.as_str())
[INFO] [stderr]    |             ^^^^^^ help: consider prefixing with an underscore: `_cf_res`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |             handler.join();
[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 0.43s
[INFO] running `"docker" "inspect" "9964ef1b46413d26fe51b866ade4a073c3d2f1ddc0b6df12ce6a78b77f159b6c"`
[INFO] running `"docker" "rm" "-f" "9964ef1b46413d26fe51b866ade4a073c3d2f1ddc0b6df12ce6a78b77f159b6c"`
[INFO] [stdout] 9964ef1b46413d26fe51b866ade4a073c3d2f1ddc0b6df12ce6a78b77f159b6c