Nov 28 06:35:37.533 INFO checking dgoetsch/glutton against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 28 06:35:37.535 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-4/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/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 +db42d4dad33013eba11ef37342ad9f614e5652b8-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"`
Nov 28 06:35:37.788 INFO [stdout] 24e7bc928d7530a61e7a8fb4e5a5c03221f3605d920d75726a8eeab039660ae6
Nov 28 06:35:37.794 INFO running `"docker" "start" "-a" "24e7bc928d7530a61e7a8fb4e5a5c03221f3605d920d75726a8eeab039660ae6"`
Nov 28 06:35:39.050 INFO [stderr] usermod: no changes
Nov 28 06:35:39.101 INFO [stderr]     Checking rust-by-ex v0.1.0 (/source)
Nov 28 06:35:39.704 INFO [stderr] warning: unused import: `std::iter::Map`
Nov 28 06:35:39.704 INFO [stderr]  --> src/main.rs:6:5
Nov 28 06:35:39.704 INFO [stderr]   |
Nov 28 06:35:39.704 INFO [stderr] 6 | use std::iter::Map;
Nov 28 06:35:39.704 INFO [stderr]   |     ^^^^^^^^^^^^^^
Nov 28 06:35:39.704 INFO [stderr]   |
Nov 28 06:35:39.704 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 28 06:35:39.704 INFO [stderr] 
Nov 28 06:35:39.704 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Nov 28 06:35:39.704 INFO [stderr]   --> src/main.rs:18:21
Nov 28 06:35:39.704 INFO [stderr]    |
Nov 28 06:35:39.704 INFO [stderr] 18 |         for idx in  (0..self.at_a_time) {
Nov 28 06:35:39.704 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Nov 28 06:35:39.704 INFO [stderr]    |
Nov 28 06:35:39.704 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Nov 28 06:35:39.704 INFO [stderr] 
Nov 28 06:35:39.752 INFO [stderr] warning: use of deprecated item 'rand::Rng::gen_ascii_chars': use sample_iter(&Alphanumeric) instead
Nov 28 06:35:39.752 INFO [stderr]   --> src/main.rs:32:33
Nov 28 06:35:39.752 INFO [stderr]    |
Nov 28 06:35:39.752 INFO [stderr] 32 |         let name = thread_rng().gen_ascii_chars().take(10) .collect::<String>();
Nov 28 06:35:39.752 INFO [stderr]    |                                 ^^^^^^^^^^^^^^^
Nov 28 06:35:39.752 INFO [stderr]    |
Nov 28 06:35:39.752 INFO [stderr]    = note: #[warn(deprecated)] on by default
Nov 28 06:35:39.752 INFO [stderr] 
Nov 28 06:35:39.780 INFO [stderr] warning: unused import: `std::iter::Map`
Nov 28 06:35:39.780 INFO [stderr]  --> src/main.rs:6:5
Nov 28 06:35:39.780 INFO [stderr]   |
Nov 28 06:35:39.780 INFO [stderr] 6 | use std::iter::Map;
Nov 28 06:35:39.780 INFO [stderr]   |     ^^^^^^^^^^^^^^
Nov 28 06:35:39.780 INFO [stderr]   |
Nov 28 06:35:39.780 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 28 06:35:39.780 INFO [stderr] 
Nov 28 06:35:39.780 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Nov 28 06:35:39.780 INFO [stderr]   --> src/main.rs:18:21
Nov 28 06:35:39.780 INFO [stderr]    |
Nov 28 06:35:39.780 INFO [stderr] 18 |         for idx in  (0..self.at_a_time) {
Nov 28 06:35:39.780 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Nov 28 06:35:39.780 INFO [stderr]    |
Nov 28 06:35:39.780 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Nov 28 06:35:39.780 INFO [stderr] 
Nov 28 06:35:39.792 INFO [stderr] warning: unused variable: `idx`
Nov 28 06:35:39.792 INFO [stderr]   --> src/main.rs:18:13
Nov 28 06:35:39.792 INFO [stderr]    |
Nov 28 06:35:39.792 INFO [stderr] 18 |         for idx in  (0..self.at_a_time) {
Nov 28 06:35:39.792 INFO [stderr]    |             ^^^ help: consider using `_idx` instead
Nov 28 06:35:39.792 INFO [stderr]    |
Nov 28 06:35:39.792 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 28 06:35:39.792 INFO [stderr] 
Nov 28 06:35:39.792 INFO [stderr] warning: unused variable: `cd_res`
Nov 28 06:35:39.792 INFO [stderr]   --> src/main.rs:38:13
Nov 28 06:35:39.792 INFO [stderr]    |
Nov 28 06:35:39.792 INFO [stderr] 38 |         let cd_res = std::fs::create_dir_all(sub_dir.as_str());
Nov 28 06:35:39.792 INFO [stderr]    |             ^^^^^^ help: consider using `_cd_res` instead
Nov 28 06:35:39.792 INFO [stderr] 
Nov 28 06:35:39.792 INFO [stderr] warning: unused variable: `cf_res`
Nov 28 06:35:39.792 INFO [stderr]   --> src/main.rs:46:13
Nov 28 06:35:39.792 INFO [stderr]    |
Nov 28 06:35:39.792 INFO [stderr] 46 |         let cf_res = std::fs::File::create(file_name.as_str())
Nov 28 06:35:39.793 INFO [stderr]    |             ^^^^^^ help: consider using `_cf_res` instead
Nov 28 06:35:39.793 INFO [stderr] 
Nov 28 06:35:39.814 INFO [stderr] warning: use of deprecated item 'rand::Rng::gen_ascii_chars': use sample_iter(&Alphanumeric) instead
Nov 28 06:35:39.814 INFO [stderr]   --> src/main.rs:32:33
Nov 28 06:35:39.814 INFO [stderr]    |
Nov 28 06:35:39.814 INFO [stderr] 32 |         let name = thread_rng().gen_ascii_chars().take(10) .collect::<String>();
Nov 28 06:35:39.814 INFO [stderr]    |                                 ^^^^^^^^^^^^^^^
Nov 28 06:35:39.814 INFO [stderr]    |
Nov 28 06:35:39.814 INFO [stderr]    = note: #[warn(deprecated)] on by default
Nov 28 06:35:39.814 INFO [stderr] 
Nov 28 06:35:39.814 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 06:35:39.814 INFO [stderr]   --> src/main.rs:23:13
Nov 28 06:35:39.814 INFO [stderr]    |
Nov 28 06:35:39.814 INFO [stderr] 23 |             handler.join();
Nov 28 06:35:39.814 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Nov 28 06:35:39.814 INFO [stderr]    |
Nov 28 06:35:39.814 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 28 06:35:39.814 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 06:35:39.814 INFO [stderr] 
Nov 28 06:35:39.888 INFO [stderr] warning: unused variable: `idx`
Nov 28 06:35:39.888 INFO [stderr]   --> src/main.rs:18:13
Nov 28 06:35:39.888 INFO [stderr]    |
Nov 28 06:35:39.888 INFO [stderr] 18 |         for idx in  (0..self.at_a_time) {
Nov 28 06:35:39.888 INFO [stderr]    |             ^^^ help: consider using `_idx` instead
Nov 28 06:35:39.888 INFO [stderr]    |
Nov 28 06:35:39.888 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 28 06:35:39.888 INFO [stderr] 
Nov 28 06:35:39.888 INFO [stderr] warning: unused variable: `cd_res`
Nov 28 06:35:39.888 INFO [stderr]   --> src/main.rs:38:13
Nov 28 06:35:39.888 INFO [stderr]    |
Nov 28 06:35:39.888 INFO [stderr] 38 |         let cd_res = std::fs::create_dir_all(sub_dir.as_str());
Nov 28 06:35:39.888 INFO [stderr]    |             ^^^^^^ help: consider using `_cd_res` instead
Nov 28 06:35:39.888 INFO [stderr] 
Nov 28 06:35:39.888 INFO [stderr] warning: unused variable: `cf_res`
Nov 28 06:35:39.888 INFO [stderr]   --> src/main.rs:46:13
Nov 28 06:35:39.888 INFO [stderr]    |
Nov 28 06:35:39.888 INFO [stderr] 46 |         let cf_res = std::fs::File::create(file_name.as_str())
Nov 28 06:35:39.888 INFO [stderr]    |             ^^^^^^ help: consider using `_cf_res` instead
Nov 28 06:35:39.888 INFO [stderr] 
Nov 28 06:35:39.912 INFO [stderr] warning: unused `std::result::Result` that must be used
Nov 28 06:35:39.916 INFO [stderr]   --> src/main.rs:23:13
Nov 28 06:35:39.916 INFO [stderr]    |
Nov 28 06:35:39.916 INFO [stderr] 23 |             handler.join();
Nov 28 06:35:39.916 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Nov 28 06:35:39.916 INFO [stderr]    |
Nov 28 06:35:39.916 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 28 06:35:39.916 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 06:35:39.916 INFO [stderr] 
Nov 28 06:35:39.949 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
Nov 28 06:35:39.952 INFO [stderr] su: No module specific data is present
Nov 28 06:35:40.646 INFO running `"docker" "inspect" "24e7bc928d7530a61e7a8fb4e5a5c03221f3605d920d75726a8eeab039660ae6"`
Nov 28 06:35:40.838 INFO running `"docker" "rm" "-f" "24e7bc928d7530a61e7a8fb4e5a5c03221f3605d920d75726a8eeab039660ae6"`
Nov 28 06:35:40.975 INFO [stdout] 24e7bc928d7530a61e7a8fb4e5a5c03221f3605d920d75726a8eeab039660ae6