Dec 04 13:57:35.157 INFO checking mmstick/parallel against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 13:57:35.157 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-7/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/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 13:57:35.555 INFO [stdout] 2a1186dc0a9cd5827fcf937012f444a916c5b225f295fad4696c5a8edefa2d61
Dec 04 13:57:35.557 INFO running `"docker" "start" "-a" "2a1186dc0a9cd5827fcf937012f444a916c5b225f295fad4696c5a8edefa2d61"`
Dec 04 13:57:37.231 INFO [stderr] usermod: no changes
Dec 04 13:57:37.363 INFO [stderr]     Checking numtoa v0.0.7
Dec 04 13:57:37.371 INFO [stderr]     Checking permutate v0.3.2
Dec 04 13:57:37.371 INFO [stderr]    Compiling sys-info v0.5.0
Dec 04 13:57:37.371 INFO [stderr]     Checking wait-timeout v0.1.5
Dec 04 13:57:37.371 INFO [stderr]     Checking arrayvec v0.4.6
Dec 04 13:57:40.613 INFO [stderr]     Checking parallel v0.11.3 (/source)
Dec 04 13:57:41.244 INFO [stderr] warning: doc comment not used by rustdoc
Dec 04 13:57:41.244 INFO [stderr]    --> src/main.rs:242:9
Dec 04 13:57:41.244 INFO [stderr]     |
Dec 04 13:57:41.244 INFO [stderr] 242 |         /// Prints messages from executed commands in the correct order.
Dec 04 13:57:41.244 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 13:57:41.244 INFO [stderr]     |
Dec 04 13:57:41.244 INFO [stderr]     = note: #[warn(unused_doc_comments)] on by default
Dec 04 13:57:41.244 INFO [stderr] 
Dec 04 13:57:41.244 INFO [stderr] warning: doc comment not used by rustdoc
Dec 04 13:57:41.244 INFO [stderr]    --> src/main.rs:245:9
Dec 04 13:57:41.244 INFO [stderr]     |
Dec 04 13:57:41.244 INFO [stderr] 245 |         /// Wait for all threads to exit before proceeding.
Dec 04 13:57:41.244 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 13:57:41.244 INFO [stderr] 
Dec 04 13:57:41.451 INFO [stderr] warning: unnecessary parentheses around method argument
Dec 04 13:57:41.451 INFO [stderr]    --> src/input_iterator/iterator.rs:231:48
Dec 04 13:57:41.451 INFO [stderr]     |
Dec 04 13:57:41.451 INFO [stderr] 231 |         for (actual, expected) in iterator.zip((1..4096)) {
Dec 04 13:57:41.451 INFO [stderr]     |                                                ^^^^^^^^^ help: remove these parentheses
Dec 04 13:57:41.451 INFO [stderr]     |
Dec 04 13:57:41.451 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 04 13:57:41.451 INFO [stderr] 
Dec 04 13:57:41.451 INFO [stderr] warning: doc comment not used by rustdoc
Dec 04 13:57:41.451 INFO [stderr]    --> src/main.rs:242:9
Dec 04 13:57:41.451 INFO [stderr]     |
Dec 04 13:57:41.451 INFO [stderr] 242 |         /// Prints messages from executed commands in the correct order.
Dec 04 13:57:41.451 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 13:57:41.451 INFO [stderr]     |
Dec 04 13:57:41.451 INFO [stderr]     = note: #[warn(unused_doc_comments)] on by default
Dec 04 13:57:41.451 INFO [stderr] 
Dec 04 13:57:41.451 INFO [stderr] warning: doc comment not used by rustdoc
Dec 04 13:57:41.451 INFO [stderr]    --> src/main.rs:245:9
Dec 04 13:57:41.451 INFO [stderr]     |
Dec 04 13:57:41.451 INFO [stderr] 245 |         /// Wait for all threads to exit before proceeding.
Dec 04 13:57:41.451 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 13:57:41.451 INFO [stderr] 
Dec 04 13:57:42.675 INFO [stderr] warning: variable does not need to be mutable
Dec 04 13:57:42.675 INFO [stderr]    --> src/arguments/mod.rs:553:9
Dec 04 13:57:42.675 INFO [stderr]     |
Dec 04 13:57:42.676 INFO [stderr] 553 |     let mut append_list = &mut Vec::new();
Dec 04 13:57:42.676 INFO [stderr]     |         ----^^^^^^^^^^^
Dec 04 13:57:42.676 INFO [stderr]     |         |
Dec 04 13:57:42.676 INFO [stderr]     |         help: remove this `mut`
Dec 04 13:57:42.677 INFO [stderr]     |
Dec 04 13:57:42.677 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 04 13:57:42.677 INFO [stderr] 
Dec 04 13:57:42.743 INFO [stderr] warning: variable does not need to be mutable
Dec 04 13:57:42.743 INFO [stderr]    --> src/arguments/mod.rs:553:9
Dec 04 13:57:42.743 INFO [stderr]     |
Dec 04 13:57:42.743 INFO [stderr] 553 |     let mut append_list = &mut Vec::new();
Dec 04 13:57:42.743 INFO [stderr]     |         ----^^^^^^^^^^^
Dec 04 13:57:42.743 INFO [stderr]     |         |
Dec 04 13:57:42.743 INFO [stderr]     |         help: remove this `mut`
Dec 04 13:57:42.743 INFO [stderr]     |
Dec 04 13:57:42.743 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 04 13:57:42.743 INFO [stderr] 
Dec 04 13:57:42.802 INFO [stderr] warning: variable does not need to be mutable
Dec 04 13:57:42.802 INFO [stderr]   --> src/execute/exec_commands.rs:36:13
Dec 04 13:57:42.802 INFO [stderr]    |
Dec 04 13:57:42.803 INFO [stderr] 36 |         let mut command_buffer = &mut String::with_capacity(64);
Dec 04 13:57:42.803 INFO [stderr]    |             ----^^^^^^^^^^^^^^
Dec 04 13:57:42.803 INFO [stderr]    |             |
Dec 04 13:57:42.803 INFO [stderr]    |             help: remove this `mut`
Dec 04 13:57:42.803 INFO [stderr] 
Dec 04 13:57:42.817 INFO [stderr] warning: variable does not need to be mutable
Dec 04 13:57:42.817 INFO [stderr]   --> src/execute/exec_commands.rs:36:13
Dec 04 13:57:42.817 INFO [stderr]    |
Dec 04 13:57:42.818 INFO [stderr] 36 |         let mut command_buffer = &mut String::with_capacity(64);
Dec 04 13:57:42.818 INFO [stderr]    |             ----^^^^^^^^^^^^^^
Dec 04 13:57:42.818 INFO [stderr]    |             |
Dec 04 13:57:42.818 INFO [stderr]    |             help: remove this `mut`
Dec 04 13:57:42.818 INFO [stderr] 
Dec 04 13:57:42.887 INFO [stderr] warning: variable does not need to be mutable
Dec 04 13:57:42.887 INFO [stderr]   --> src/execute/pipe.rs:41:17
Dec 04 13:57:42.887 INFO [stderr]    |
Dec 04 13:57:42.888 INFO [stderr] 41 |             let mut stdout = child.stdout.as_mut().expect("unable to open stdout of child");
Dec 04 13:57:42.888 INFO [stderr]    |                 ----^^^^^^
Dec 04 13:57:42.888 INFO [stderr]    |                 |
Dec 04 13:57:42.888 INFO [stderr]    |                 help: remove this `mut`
Dec 04 13:57:42.889 INFO [stderr] 
Dec 04 13:57:42.927 INFO [stderr] warning: variable does not need to be mutable
Dec 04 13:57:42.927 INFO [stderr]   --> src/execute/pipe.rs:41:17
Dec 04 13:57:42.927 INFO [stderr]    |
Dec 04 13:57:42.927 INFO [stderr] 41 |             let mut stdout = child.stdout.as_mut().expect("unable to open stdout of child");
Dec 04 13:57:42.927 INFO [stderr]    |                 ----^^^^^^
Dec 04 13:57:42.928 INFO [stderr]    |                 |
Dec 04 13:57:42.928 INFO [stderr]    |                 help: remove this `mut`
Dec 04 13:57:42.928 INFO [stderr] 
Dec 04 13:57:43.164 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.89s
Dec 04 13:57:43.168 INFO [stderr] su: No module specific data is present
Dec 04 13:57:44.587 INFO running `"docker" "inspect" "2a1186dc0a9cd5827fcf937012f444a916c5b225f295fad4696c5a8edefa2d61"`
Dec 04 13:57:44.901 INFO running `"docker" "rm" "-f" "2a1186dc0a9cd5827fcf937012f444a916c5b225f295fad4696c5a8edefa2d61"`
Dec 04 13:57:45.179 INFO [stdout] 2a1186dc0a9cd5827fcf937012f444a916c5b225f295fad4696c5a8edefa2d61