Dec 11 13:26:52.057 INFO checking mmstick/parallel against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 13:26:52.057 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-1/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 11 13:26:52.588 INFO [stdout] e7a12ec9ce78ba56e5c6d54569ab34996a3de0de570c02cdd33b234179576c0f
Dec 11 13:26:52.594 INFO running `"docker" "start" "-a" "e7a12ec9ce78ba56e5c6d54569ab34996a3de0de570c02cdd33b234179576c0f"`
Dec 11 13:26:54.192 INFO [stderr] usermod: no changes
Dec 11 13:26:54.309 INFO [stderr]     Checking permutate v0.3.2
Dec 11 13:26:54.309 INFO [stderr]     Checking numtoa v0.0.7
Dec 11 13:26:54.324 INFO [stderr]    Compiling sys-info v0.5.0
Dec 11 13:26:54.324 INFO [stderr]     Checking wait-timeout v0.1.5
Dec 11 13:26:54.396 INFO [stderr]     Checking arrayvec v0.4.6
Dec 11 13:26:57.482 INFO [stderr]     Checking parallel v0.11.3 (/source)
Dec 11 13:26:58.217 INFO [stderr] warning: doc comment not used by rustdoc
Dec 11 13:26:58.217 INFO [stderr]    --> src/main.rs:242:9
Dec 11 13:26:58.218 INFO [stderr]     |
Dec 11 13:26:58.218 INFO [stderr] 242 |         /// Prints messages from executed commands in the correct order.
Dec 11 13:26:58.218 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 13:26:58.218 INFO [stderr]     |
Dec 11 13:26:58.219 INFO [stderr]     = note: #[warn(unused_doc_comments)] on by default
Dec 11 13:26:58.219 INFO [stderr] 
Dec 11 13:26:58.219 INFO [stderr] warning: doc comment not used by rustdoc
Dec 11 13:26:58.220 INFO [stderr]    --> src/main.rs:245:9
Dec 11 13:26:58.220 INFO [stderr]     |
Dec 11 13:26:58.220 INFO [stderr] 245 |         /// Wait for all threads to exit before proceeding.
Dec 11 13:26:58.220 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 13:26:58.221 INFO [stderr] 
Dec 11 13:26:58.632 INFO [stderr] warning: unnecessary parentheses around method argument
Dec 11 13:26:58.633 INFO [stderr]    --> src/input_iterator/iterator.rs:231:48
Dec 11 13:26:58.633 INFO [stderr]     |
Dec 11 13:26:58.634 INFO [stderr] 231 |         for (actual, expected) in iterator.zip((1..4096)) {
Dec 11 13:26:58.634 INFO [stderr]     |                                                ^^^^^^^^^ help: remove these parentheses
Dec 11 13:26:58.634 INFO [stderr]     |
Dec 11 13:26:58.635 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 11 13:26:58.635 INFO [stderr] 
Dec 11 13:26:58.635 INFO [stderr] warning: doc comment not used by rustdoc
Dec 11 13:26:58.635 INFO [stderr]    --> src/main.rs:242:9
Dec 11 13:26:58.636 INFO [stderr]     |
Dec 11 13:26:58.636 INFO [stderr] 242 |         /// Prints messages from executed commands in the correct order.
Dec 11 13:26:58.636 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 13:26:58.637 INFO [stderr]     |
Dec 11 13:26:58.637 INFO [stderr]     = note: #[warn(unused_doc_comments)] on by default
Dec 11 13:26:58.637 INFO [stderr] 
Dec 11 13:26:58.638 INFO [stderr] warning: doc comment not used by rustdoc
Dec 11 13:26:58.638 INFO [stderr]    --> src/main.rs:245:9
Dec 11 13:26:58.638 INFO [stderr]     |
Dec 11 13:26:58.639 INFO [stderr] 245 |         /// Wait for all threads to exit before proceeding.
Dec 11 13:26:58.639 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 13:26:58.639 INFO [stderr] 
Dec 11 13:26:59.437 INFO [stderr] warning: variable does not need to be mutable
Dec 11 13:26:59.438 INFO [stderr]    --> src/arguments/mod.rs:553:9
Dec 11 13:26:59.438 INFO [stderr]     |
Dec 11 13:26:59.438 INFO [stderr] 553 |     let mut append_list = &mut Vec::new();
Dec 11 13:26:59.438 INFO [stderr]     |         ----^^^^^^^^^^^
Dec 11 13:26:59.439 INFO [stderr]     |         |
Dec 11 13:26:59.439 INFO [stderr]     |         help: remove this `mut`
Dec 11 13:26:59.439 INFO [stderr]     |
Dec 11 13:26:59.440 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 11 13:26:59.440 INFO [stderr] 
Dec 11 13:26:59.549 INFO [stderr] warning: variable does not need to be mutable
Dec 11 13:26:59.549 INFO [stderr]   --> src/execute/exec_commands.rs:36:13
Dec 11 13:26:59.549 INFO [stderr]    |
Dec 11 13:26:59.549 INFO [stderr] 36 |         let mut command_buffer = &mut String::with_capacity(64);
Dec 11 13:26:59.549 INFO [stderr]    |             ----^^^^^^^^^^^^^^
Dec 11 13:26:59.549 INFO [stderr]    |             |
Dec 11 13:26:59.549 INFO [stderr]    |             help: remove this `mut`
Dec 11 13:26:59.549 INFO [stderr] 
Dec 11 13:26:59.681 INFO [stderr] warning: variable does not need to be mutable
Dec 11 13:26:59.681 INFO [stderr]   --> src/execute/pipe.rs:41:17
Dec 11 13:26:59.681 INFO [stderr]    |
Dec 11 13:26:59.681 INFO [stderr] 41 |             let mut stdout = child.stdout.as_mut().expect("unable to open stdout of child");
Dec 11 13:26:59.681 INFO [stderr]    |                 ----^^^^^^
Dec 11 13:26:59.681 INFO [stderr]    |                 |
Dec 11 13:26:59.681 INFO [stderr]    |                 help: remove this `mut`
Dec 11 13:26:59.681 INFO [stderr] 
Dec 11 13:26:59.964 INFO [stderr] warning: variable does not need to be mutable
Dec 11 13:26:59.964 INFO [stderr]    --> src/arguments/mod.rs:553:9
Dec 11 13:26:59.964 INFO [stderr]     |
Dec 11 13:26:59.964 INFO [stderr] 553 |     let mut append_list = &mut Vec::new();
Dec 11 13:26:59.964 INFO [stderr]     |         ----^^^^^^^^^^^
Dec 11 13:26:59.964 INFO [stderr]     |         |
Dec 11 13:26:59.964 INFO [stderr]     |         help: remove this `mut`
Dec 11 13:26:59.964 INFO [stderr]     |
Dec 11 13:26:59.964 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 11 13:26:59.964 INFO [stderr] 
Dec 11 13:27:00.044 INFO [stderr] warning: variable does not need to be mutable
Dec 11 13:27:00.044 INFO [stderr]   --> src/execute/exec_commands.rs:36:13
Dec 11 13:27:00.044 INFO [stderr]    |
Dec 11 13:27:00.044 INFO [stderr] 36 |         let mut command_buffer = &mut String::with_capacity(64);
Dec 11 13:27:00.044 INFO [stderr]    |             ----^^^^^^^^^^^^^^
Dec 11 13:27:00.044 INFO [stderr]    |             |
Dec 11 13:27:00.044 INFO [stderr]    |             help: remove this `mut`
Dec 11 13:27:00.044 INFO [stderr] 
Dec 11 13:27:00.100 INFO [stderr] warning: variable does not need to be mutable
Dec 11 13:27:00.100 INFO [stderr]   --> src/execute/pipe.rs:41:17
Dec 11 13:27:00.100 INFO [stderr]    |
Dec 11 13:27:00.100 INFO [stderr] 41 |             let mut stdout = child.stdout.as_mut().expect("unable to open stdout of child");
Dec 11 13:27:00.100 INFO [stderr]    |                 ----^^^^^^
Dec 11 13:27:00.100 INFO [stderr]    |                 |
Dec 11 13:27:00.100 INFO [stderr]    |                 help: remove this `mut`
Dec 11 13:27:00.100 INFO [stderr] 
Dec 11 13:27:00.287 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.06s
Dec 11 13:27:00.291 INFO [stderr] su: No module specific data is present
Dec 11 13:27:01.718 INFO running `"docker" "inspect" "e7a12ec9ce78ba56e5c6d54569ab34996a3de0de570c02cdd33b234179576c0f"`
Dec 11 13:27:02.080 INFO running `"docker" "rm" "-f" "e7a12ec9ce78ba56e5c6d54569ab34996a3de0de570c02cdd33b234179576c0f"`
Dec 11 13:27:02.368 INFO [stdout] e7a12ec9ce78ba56e5c6d54569ab34996a3de0de570c02cdd33b234179576c0f