Nov 29 22:08:26.651 INFO checking mmstick/parallel against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 29 22:08:26.651 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-4/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/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 +32252761328f59ccfadb1bafb8148c685bc830b3-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 29 22:08:27.096 INFO [stdout] 077050e5222329f18f30edf06e05f52d02d6c6ebcedf9180c0433f4007dddf12
Nov 29 22:08:27.104 INFO running `"docker" "start" "-a" "077050e5222329f18f30edf06e05f52d02d6c6ebcedf9180c0433f4007dddf12"`
Nov 29 22:08:28.319 INFO [stderr] usermod: no changes
Nov 29 22:08:28.472 INFO [stderr]     Checking permutate v0.3.2
Nov 29 22:08:28.472 INFO [stderr]     Checking numtoa v0.0.7
Nov 29 22:08:28.472 INFO [stderr]    Compiling sys-info v0.5.0
Nov 29 22:08:28.480 INFO [stderr]     Checking wait-timeout v0.1.5
Nov 29 22:08:30.676 INFO [stderr]     Checking parallel v0.11.3 (/source)
Nov 29 22:08:31.300 INFO [stderr] warning: doc comment not used by rustdoc
Nov 29 22:08:31.301 INFO [stderr]    --> src/main.rs:242:9
Nov 29 22:08:31.301 INFO [stderr]     |
Nov 29 22:08:31.301 INFO [stderr] 242 |         /// Prints messages from executed commands in the correct order.
Nov 29 22:08:31.302 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 22:08:31.302 INFO [stderr]     |
Nov 29 22:08:31.302 INFO [stderr]     = note: #[warn(unused_doc_comments)] on by default
Nov 29 22:08:31.303 INFO [stderr] 
Nov 29 22:08:31.303 INFO [stderr] warning: doc comment not used by rustdoc
Nov 29 22:08:31.303 INFO [stderr]    --> src/main.rs:245:9
Nov 29 22:08:31.303 INFO [stderr]     |
Nov 29 22:08:31.304 INFO [stderr] 245 |         /// Wait for all threads to exit before proceeding.
Nov 29 22:08:31.304 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 22:08:31.304 INFO [stderr] 
Nov 29 22:08:31.380 INFO [stderr] warning: unnecessary parentheses around method argument
Nov 29 22:08:31.380 INFO [stderr]    --> src/input_iterator/iterator.rs:231:48
Nov 29 22:08:31.381 INFO [stderr]     |
Nov 29 22:08:31.381 INFO [stderr] 231 |         for (actual, expected) in iterator.zip((1..4096)) {
Nov 29 22:08:31.381 INFO [stderr]     |                                                ^^^^^^^^^ help: remove these parentheses
Nov 29 22:08:31.381 INFO [stderr]     |
Nov 29 22:08:31.381 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Nov 29 22:08:31.381 INFO [stderr] 
Nov 29 22:08:31.392 INFO [stderr] warning: doc comment not used by rustdoc
Nov 29 22:08:31.393 INFO [stderr]    --> src/main.rs:242:9
Nov 29 22:08:31.393 INFO [stderr]     |
Nov 29 22:08:31.393 INFO [stderr] 242 |         /// Prints messages from executed commands in the correct order.
Nov 29 22:08:31.393 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 22:08:31.394 INFO [stderr]     |
Nov 29 22:08:31.394 INFO [stderr]     = note: #[warn(unused_doc_comments)] on by default
Nov 29 22:08:31.394 INFO [stderr] 
Nov 29 22:08:31.394 INFO [stderr] warning: doc comment not used by rustdoc
Nov 29 22:08:31.395 INFO [stderr]    --> src/main.rs:245:9
Nov 29 22:08:31.395 INFO [stderr]     |
Nov 29 22:08:31.395 INFO [stderr] 245 |         /// Wait for all threads to exit before proceeding.
Nov 29 22:08:31.395 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 22:08:31.396 INFO [stderr] 
Nov 29 22:08:32.480 INFO [stderr] warning: variable does not need to be mutable
Nov 29 22:08:32.481 INFO [stderr]    --> src/arguments/mod.rs:553:9
Nov 29 22:08:32.481 INFO [stderr]     |
Nov 29 22:08:32.481 INFO [stderr] 553 |     let mut append_list = &mut Vec::new();
Nov 29 22:08:32.481 INFO [stderr]     |         ----^^^^^^^^^^^
Nov 29 22:08:32.482 INFO [stderr]     |         |
Nov 29 22:08:32.482 INFO [stderr]     |         help: remove this `mut`
Nov 29 22:08:32.482 INFO [stderr]     |
Nov 29 22:08:32.482 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Nov 29 22:08:32.482 INFO [stderr] 
Nov 29 22:08:32.592 INFO [stderr] warning: variable does not need to be mutable
Nov 29 22:08:32.592 INFO [stderr]   --> src/execute/exec_commands.rs:36:13
Nov 29 22:08:32.593 INFO [stderr]    |
Nov 29 22:08:32.593 INFO [stderr] 36 |         let mut command_buffer = &mut String::with_capacity(64);
Nov 29 22:08:32.593 INFO [stderr]    |             ----^^^^^^^^^^^^^^
Nov 29 22:08:32.593 INFO [stderr]    |             |
Nov 29 22:08:32.593 INFO [stderr]    |             help: remove this `mut`
Nov 29 22:08:32.593 INFO [stderr] 
Nov 29 22:08:32.678 INFO [stderr] warning: variable does not need to be mutable
Nov 29 22:08:32.678 INFO [stderr]   --> src/execute/pipe.rs:41:17
Nov 29 22:08:32.678 INFO [stderr]    |
Nov 29 22:08:32.678 INFO [stderr] 41 |             let mut stdout = child.stdout.as_mut().expect("unable to open stdout of child");
Nov 29 22:08:32.678 INFO [stderr]    |                 ----^^^^^^
Nov 29 22:08:32.678 INFO [stderr]    |                 |
Nov 29 22:08:32.678 INFO [stderr]    |                 help: remove this `mut`
Nov 29 22:08:32.678 INFO [stderr] 
Nov 29 22:08:32.682 INFO [stderr] warning: variable does not need to be mutable
Nov 29 22:08:32.682 INFO [stderr]    --> src/arguments/mod.rs:553:9
Nov 29 22:08:32.682 INFO [stderr]     |
Nov 29 22:08:32.682 INFO [stderr] 553 |     let mut append_list = &mut Vec::new();
Nov 29 22:08:32.682 INFO [stderr]     |         ----^^^^^^^^^^^
Nov 29 22:08:32.682 INFO [stderr]     |         |
Nov 29 22:08:32.682 INFO [stderr]     |         help: remove this `mut`
Nov 29 22:08:32.682 INFO [stderr]     |
Nov 29 22:08:32.682 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Nov 29 22:08:32.682 INFO [stderr] 
Nov 29 22:08:32.838 INFO [stderr] warning: variable does not need to be mutable
Nov 29 22:08:32.838 INFO [stderr]   --> src/execute/exec_commands.rs:36:13
Nov 29 22:08:32.838 INFO [stderr]    |
Nov 29 22:08:32.838 INFO [stderr] 36 |         let mut command_buffer = &mut String::with_capacity(64);
Nov 29 22:08:32.838 INFO [stderr]    |             ----^^^^^^^^^^^^^^
Nov 29 22:08:32.838 INFO [stderr]    |             |
Nov 29 22:08:32.838 INFO [stderr]    |             help: remove this `mut`
Nov 29 22:08:32.838 INFO [stderr] 
Nov 29 22:08:32.900 INFO [stderr] warning: variable does not need to be mutable
Nov 29 22:08:32.900 INFO [stderr]   --> src/execute/pipe.rs:41:17
Nov 29 22:08:32.900 INFO [stderr]    |
Nov 29 22:08:32.900 INFO [stderr] 41 |             let mut stdout = child.stdout.as_mut().expect("unable to open stdout of child");
Nov 29 22:08:32.900 INFO [stderr]    |                 ----^^^^^^
Nov 29 22:08:32.900 INFO [stderr]    |                 |
Nov 29 22:08:32.900 INFO [stderr]    |                 help: remove this `mut`
Nov 29 22:08:32.900 INFO [stderr] 
Nov 29 22:08:33.067 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.70s
Nov 29 22:08:33.071 INFO [stderr] su: No module specific data is present
Nov 29 22:08:33.653 INFO running `"docker" "inspect" "077050e5222329f18f30edf06e05f52d02d6c6ebcedf9180c0433f4007dddf12"`
Nov 29 22:08:33.928 INFO running `"docker" "rm" "-f" "077050e5222329f18f30edf06e05f52d02d6c6ebcedf9180c0433f4007dddf12"`
Nov 29 22:08:34.360 INFO [stdout] 077050e5222329f18f30edf06e05f52d02d6c6ebcedf9180c0433f4007dddf12