Dec 05 08:36:09.005 INFO checking r4-1.0.1 against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 05 08:36:09.005 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-1/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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 05 08:36:09.223 INFO [stdout] c3650f19650aa1caa4c3848f529f8518143a36f797b5562331c04217c989f914
Dec 05 08:36:09.228 INFO running `"docker" "start" "-a" "c3650f19650aa1caa4c3848f529f8518143a36f797b5562331c04217c989f914"`
Dec 05 08:36:09.782 INFO [stderr] usermod: no changes
Dec 05 08:36:09.823 INFO [stderr]     Checking r4 v1.0.1 (/source)
Dec 05 08:36:10.587 INFO [stderr] warning: unused variable: `i`
Dec 05 08:36:10.587 INFO [stderr]    --> src/lib.rs:407:34
Dec 05 08:36:10.587 INFO [stderr]     |
Dec 05 08:36:10.587 INFO [stderr] 407 |                     iterate![for i in 0..4;
Dec 05 08:36:10.587 INFO [stderr]     |                                  ^ help: consider using `_i` instead
Dec 05 08:36:10.587 INFO [stderr]     |
Dec 05 08:36:10.588 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 05 08:36:10.588 INFO [stderr] 
Dec 05 08:36:10.588 INFO [stderr] warning: unused variable: `x`
Dec 05 08:36:10.588 INFO [stderr]    --> src/lib.rs:433:34
Dec 05 08:36:10.588 INFO [stderr]     |
Dec 05 08:36:10.588 INFO [stderr] 433 |                     iterate![for x in vs.iter();
Dec 05 08:36:10.588 INFO [stderr]     |                                  ^ help: consider using `_x` instead
Dec 05 08:36:10.588 INFO [stderr] 
Dec 05 08:36:10.589 INFO [stderr] warning: unused variable: `x`
Dec 05 08:36:10.589 INFO [stderr]    --> src/lib.rs:443:34
Dec 05 08:36:10.589 INFO [stderr]     |
Dec 05 08:36:10.589 INFO [stderr] 443 |                     iterate![for x in vs.iter();
Dec 05 08:36:10.589 INFO [stderr]     |                                  ^ help: consider using `_x` instead
Dec 05 08:36:10.590 INFO [stderr] 
Dec 05 08:36:10.590 INFO [stderr] warning: unused variable: `a`
Dec 05 08:36:10.590 INFO [stderr]    --> src/lib.rs:474:34
Dec 05 08:36:10.590 INFO [stderr]     |
Dec 05 08:36:10.590 INFO [stderr] 474 |                              let a = *x + 3;
Dec 05 08:36:10.591 INFO [stderr]     |                                  ^ help: consider using `_a` instead
Dec 05 08:36:10.591 INFO [stderr] 
Dec 05 08:36:10.591 INFO [stderr] warning: unused variable: `a`
Dec 05 08:36:10.591 INFO [stderr]    --> src/lib.rs:489:34
Dec 05 08:36:10.591 INFO [stderr]     |
Dec 05 08:36:10.591 INFO [stderr] 489 |                              let a = *x + 3;
Dec 05 08:36:10.592 INFO [stderr]     |                                  ^ help: consider using `_a` instead
Dec 05 08:36:10.592 INFO [stderr] 
Dec 05 08:36:10.592 INFO [stderr] warning: unused variable: `y`
Dec 05 08:36:10.592 INFO [stderr]    --> src/lib.rs:506:34
Dec 05 08:36:10.592 INFO [stderr]     |
Dec 05 08:36:10.593 INFO [stderr] 506 |                              for y in vs.iter();
Dec 05 08:36:10.593 INFO [stderr]     |                                  ^ help: consider using `_y` instead
Dec 05 08:36:10.593 INFO [stderr] 
Dec 05 08:36:10.593 INFO [stderr] warning: unused variable: `x`
Dec 05 08:36:10.593 INFO [stderr]    --> src/lib.rs:522:34
Dec 05 08:36:10.594 INFO [stderr]     |
Dec 05 08:36:10.594 INFO [stderr] 522 |                              let x = *x + 1;
Dec 05 08:36:10.594 INFO [stderr]     |                                  ^ help: consider using `_x` instead
Dec 05 08:36:10.594 INFO [stderr] 
Dec 05 08:36:10.662 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
Dec 05 08:36:10.662 INFO [stderr] su: No module specific data is present
Dec 05 08:36:10.940 INFO running `"docker" "inspect" "c3650f19650aa1caa4c3848f529f8518143a36f797b5562331c04217c989f914"`
Dec 05 08:36:11.010 INFO running `"docker" "rm" "-f" "c3650f19650aa1caa4c3848f529f8518143a36f797b5562331c04217c989f914"`
Dec 05 08:36:11.087 INFO [stdout] c3650f19650aa1caa4c3848f529f8518143a36f797b5562331c04217c989f914