Dec 04 19:51:53.120 INFO checking dgoetsch/glutton against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 19:51:53.120 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1df97983eb2057dc6a8f7eb364e263b51ae23230-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 19:51:53.327 INFO [stdout] fba8810cf6de64ff0b1d0bd157ce62d35943383cf859e7f624c5e95cb13961f5
Dec 04 19:51:53.333 INFO running `"docker" "start" "-a" "fba8810cf6de64ff0b1d0bd157ce62d35943383cf859e7f624c5e95cb13961f5"`
Dec 04 19:51:53.862 INFO [stderr] usermod: no changes
Dec 04 19:51:53.919 INFO [stderr]     Checking rust-by-ex v0.1.0 (/source)
Dec 04 19:51:54.228 INFO [stderr] warning: unused import: `std::iter::Map`
Dec 04 19:51:54.229 INFO [stderr]  --> src/main.rs:6:5
Dec 04 19:51:54.229 INFO [stderr]   |
Dec 04 19:51:54.229 INFO [stderr] 6 | use std::iter::Map;
Dec 04 19:51:54.229 INFO [stderr]   |     ^^^^^^^^^^^^^^
Dec 04 19:51:54.229 INFO [stderr]   |
Dec 04 19:51:54.229 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 19:51:54.229 INFO [stderr] 
Dec 04 19:51:54.229 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 04 19:51:54.229 INFO [stderr]   --> src/main.rs:18:21
Dec 04 19:51:54.229 INFO [stderr]    |
Dec 04 19:51:54.229 INFO [stderr] 18 |         for idx in  (0..self.at_a_time) {
Dec 04 19:51:54.229 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 04 19:51:54.229 INFO [stderr]    |
Dec 04 19:51:54.229 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 04 19:51:54.229 INFO [stderr] 
Dec 04 19:51:54.255 INFO [stderr] warning: use of deprecated item 'rand::Rng::gen_ascii_chars': use sample_iter(&Alphanumeric) instead
Dec 04 19:51:54.255 INFO [stderr]   --> src/main.rs:32:33
Dec 04 19:51:54.255 INFO [stderr]    |
Dec 04 19:51:54.255 INFO [stderr] 32 |         let name = thread_rng().gen_ascii_chars().take(10) .collect::<String>();
Dec 04 19:51:54.255 INFO [stderr]    |                                 ^^^^^^^^^^^^^^^
Dec 04 19:51:54.255 INFO [stderr]    |
Dec 04 19:51:54.255 INFO [stderr]    = note: #[warn(deprecated)] on by default
Dec 04 19:51:54.255 INFO [stderr] 
Dec 04 19:51:54.295 INFO [stderr] warning: unused variable: `idx`
Dec 04 19:51:54.295 INFO [stderr]   --> src/main.rs:18:13
Dec 04 19:51:54.295 INFO [stderr]    |
Dec 04 19:51:54.295 INFO [stderr] 18 |         for idx in  (0..self.at_a_time) {
Dec 04 19:51:54.295 INFO [stderr]    |             ^^^ help: consider using `_idx` instead
Dec 04 19:51:54.295 INFO [stderr]    |
Dec 04 19:51:54.295 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 19:51:54.295 INFO [stderr] 
Dec 04 19:51:54.295 INFO [stderr] warning: unused variable: `cd_res`
Dec 04 19:51:54.295 INFO [stderr]   --> src/main.rs:38:13
Dec 04 19:51:54.295 INFO [stderr]    |
Dec 04 19:51:54.295 INFO [stderr] 38 |         let cd_res = std::fs::create_dir_all(sub_dir.as_str());
Dec 04 19:51:54.295 INFO [stderr]    |             ^^^^^^ help: consider using `_cd_res` instead
Dec 04 19:51:54.295 INFO [stderr] 
Dec 04 19:51:54.295 INFO [stderr] warning: unused variable: `cf_res`
Dec 04 19:51:54.295 INFO [stderr]   --> src/main.rs:46:13
Dec 04 19:51:54.295 INFO [stderr]    |
Dec 04 19:51:54.295 INFO [stderr] 46 |         let cf_res = std::fs::File::create(file_name.as_str())
Dec 04 19:51:54.295 INFO [stderr]    |             ^^^^^^ help: consider using `_cf_res` instead
Dec 04 19:51:54.295 INFO [stderr] 
Dec 04 19:51:54.299 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 19:51:54.299 INFO [stderr]   --> src/main.rs:23:13
Dec 04 19:51:54.299 INFO [stderr]    |
Dec 04 19:51:54.299 INFO [stderr] 23 |             handler.join();
Dec 04 19:51:54.299 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Dec 04 19:51:54.299 INFO [stderr]    |
Dec 04 19:51:54.299 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 19:51:54.299 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 19:51:54.299 INFO [stderr] 
Dec 04 19:51:54.383 INFO [stderr] warning: unused import: `std::iter::Map`
Dec 04 19:51:54.383 INFO [stderr]  --> src/main.rs:6:5
Dec 04 19:51:54.383 INFO [stderr]   |
Dec 04 19:51:54.383 INFO [stderr] 6 | use std::iter::Map;
Dec 04 19:51:54.383 INFO [stderr]   |     ^^^^^^^^^^^^^^
Dec 04 19:51:54.383 INFO [stderr]   |
Dec 04 19:51:54.383 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 19:51:54.383 INFO [stderr] 
Dec 04 19:51:54.383 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 04 19:51:54.383 INFO [stderr]   --> src/main.rs:18:21
Dec 04 19:51:54.383 INFO [stderr]    |
Dec 04 19:51:54.383 INFO [stderr] 18 |         for idx in  (0..self.at_a_time) {
Dec 04 19:51:54.383 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 04 19:51:54.383 INFO [stderr]    |
Dec 04 19:51:54.383 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 04 19:51:54.383 INFO [stderr] 
Dec 04 19:51:54.406 INFO [stderr] warning: use of deprecated item 'rand::Rng::gen_ascii_chars': use sample_iter(&Alphanumeric) instead
Dec 04 19:51:54.406 INFO [stderr]   --> src/main.rs:32:33
Dec 04 19:51:54.406 INFO [stderr]    |
Dec 04 19:51:54.406 INFO [stderr] 32 |         let name = thread_rng().gen_ascii_chars().take(10) .collect::<String>();
Dec 04 19:51:54.406 INFO [stderr]    |                                 ^^^^^^^^^^^^^^^
Dec 04 19:51:54.406 INFO [stderr]    |
Dec 04 19:51:54.406 INFO [stderr]    = note: #[warn(deprecated)] on by default
Dec 04 19:51:54.406 INFO [stderr] 
Dec 04 19:51:54.431 INFO [stderr] warning: unused variable: `idx`
Dec 04 19:51:54.431 INFO [stderr]   --> src/main.rs:18:13
Dec 04 19:51:54.431 INFO [stderr]    |
Dec 04 19:51:54.431 INFO [stderr] 18 |         for idx in  (0..self.at_a_time) {
Dec 04 19:51:54.431 INFO [stderr]    |             ^^^ help: consider using `_idx` instead
Dec 04 19:51:54.431 INFO [stderr]    |
Dec 04 19:51:54.431 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 19:51:54.431 INFO [stderr] 
Dec 04 19:51:54.431 INFO [stderr] warning: unused variable: `cd_res`
Dec 04 19:51:54.431 INFO [stderr]   --> src/main.rs:38:13
Dec 04 19:51:54.431 INFO [stderr]    |
Dec 04 19:51:54.431 INFO [stderr] 38 |         let cd_res = std::fs::create_dir_all(sub_dir.as_str());
Dec 04 19:51:54.431 INFO [stderr]    |             ^^^^^^ help: consider using `_cd_res` instead
Dec 04 19:51:54.431 INFO [stderr] 
Dec 04 19:51:54.431 INFO [stderr] warning: unused variable: `cf_res`
Dec 04 19:51:54.431 INFO [stderr]   --> src/main.rs:46:13
Dec 04 19:51:54.431 INFO [stderr]    |
Dec 04 19:51:54.431 INFO [stderr] 46 |         let cf_res = std::fs::File::create(file_name.as_str())
Dec 04 19:51:54.431 INFO [stderr]    |             ^^^^^^ help: consider using `_cf_res` instead
Dec 04 19:51:54.431 INFO [stderr] 
Dec 04 19:51:54.442 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 19:51:54.442 INFO [stderr]   --> src/main.rs:23:13
Dec 04 19:51:54.442 INFO [stderr]    |
Dec 04 19:51:54.442 INFO [stderr] 23 |             handler.join();
Dec 04 19:51:54.442 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Dec 04 19:51:54.442 INFO [stderr]    |
Dec 04 19:51:54.442 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 19:51:54.442 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 19:51:54.442 INFO [stderr] 
Dec 04 19:51:54.455 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
Dec 04 19:51:54.459 INFO [stderr] su: No module specific data is present
Dec 04 19:51:54.702 INFO running `"docker" "inspect" "fba8810cf6de64ff0b1d0bd157ce62d35943383cf859e7f624c5e95cb13961f5"`
Dec 04 19:51:54.864 INFO running `"docker" "rm" "-f" "fba8810cf6de64ff0b1d0bd157ce62d35943383cf859e7f624c5e95cb13961f5"`
Dec 04 19:51:55.017 INFO [stdout] fba8810cf6de64ff0b1d0bd157ce62d35943383cf859e7f624c5e95cb13961f5