Dec 12 16:48:49.832 INFO checking chan-0.1.23 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 16:48:49.832 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-3/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 12 16:48:50.208 INFO [stdout] eaf510decf7b7664fa63906cf7ce703165693570c5bbba9e07a0d8edcc3b950f
Dec 12 16:48:50.210 INFO running `"docker" "start" "-a" "eaf510decf7b7664fa63906cf7ce703165693570c5bbba9e07a0d8edcc3b950f"`
Dec 12 16:48:52.100 INFO [stderr] usermod: no changes
Dec 12 16:48:52.360 INFO [stderr]     Checking chan v0.1.23 (/source)
Dec 12 16:48:59.508 INFO [stderr] warning: variable does not need to be mutable
Dec 12 16:48:59.509 INFO [stderr]    --> benches/throughput.rs:112:21
Dec 12 16:48:59.509 INFO [stderr]     |
Dec 12 16:48:59.509 INFO [stderr] 112 |                 let mut done = &mut [false, false, false, false];
Dec 12 16:48:59.509 INFO [stderr]     |                     ----^^^^
Dec 12 16:48:59.510 INFO [stderr]     |                     |
Dec 12 16:48:59.510 INFO [stderr]     |                     help: remove this `mut`
Dec 12 16:48:59.510 INFO [stderr] ...
Dec 12 16:48:59.511 INFO [stderr] 154 | bench_select_no_init!(select_no_init_chan_sync_unbuffered, chan::sync(0));
Dec 12 16:48:59.511 INFO [stderr]     | -------------------------------------------------------------------------- in this macro invocation
Dec 12 16:48:59.511 INFO [stderr]     |
Dec 12 16:48:59.511 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 16:48:59.511 INFO [stderr] 
Dec 12 16:48:59.512 INFO [stderr] warning: variable does not need to be mutable
Dec 12 16:48:59.512 INFO [stderr]    --> benches/throughput.rs:112:21
Dec 12 16:48:59.512 INFO [stderr]     |
Dec 12 16:48:59.512 INFO [stderr] 112 |                 let mut done = &mut [false, false, false, false];
Dec 12 16:48:59.513 INFO [stderr]     |                     ----^^^^
Dec 12 16:48:59.513 INFO [stderr]     |                     |
Dec 12 16:48:59.513 INFO [stderr]     |                     help: remove this `mut`
Dec 12 16:48:59.513 INFO [stderr] ...
Dec 12 16:48:59.513 INFO [stderr] 154 | bench_select_no_init!(select_no_init_chan_sync_unbuffered, chan::sync(0));
Dec 12 16:48:59.513 INFO [stderr]     | -------------------------------------------------------------------------- in this macro invocation
Dec 12 16:48:59.513 INFO [stderr] 
Dec 12 16:48:59.527 INFO [stderr] warning: variable does not need to be mutable
Dec 12 16:48:59.527 INFO [stderr]    --> benches/throughput.rs:112:21
Dec 12 16:48:59.527 INFO [stderr]     |
Dec 12 16:48:59.527 INFO [stderr] 112 |                 let mut done = &mut [false, false, false, false];
Dec 12 16:48:59.528 INFO [stderr]     |                     ----^^^^
Dec 12 16:48:59.528 INFO [stderr]     |                     |
Dec 12 16:48:59.528 INFO [stderr]     |                     help: remove this `mut`
Dec 12 16:48:59.528 INFO [stderr] ...
Dec 12 16:48:59.528 INFO [stderr] 155 | bench_select_no_init!(select_no_init_chan_sync_buffered, chan::sync(1));
Dec 12 16:48:59.528 INFO [stderr]     | ------------------------------------------------------------------------ in this macro invocation
Dec 12 16:48:59.528 INFO [stderr] 
Dec 12 16:48:59.548 INFO [stderr] warning: variable does not need to be mutable
Dec 12 16:48:59.548 INFO [stderr]    --> benches/throughput.rs:112:21
Dec 12 16:48:59.548 INFO [stderr]     |
Dec 12 16:48:59.548 INFO [stderr] 112 |                 let mut done = &mut [false, false, false, false];
Dec 12 16:48:59.548 INFO [stderr]     |                     ----^^^^
Dec 12 16:48:59.548 INFO [stderr]     |                     |
Dec 12 16:48:59.548 INFO [stderr]     |                     help: remove this `mut`
Dec 12 16:48:59.548 INFO [stderr] ...
Dec 12 16:48:59.548 INFO [stderr] 156 | bench_select_no_init!(select_no_init_chan_sync_buffered_all, chan::sync(1000));
Dec 12 16:48:59.548 INFO [stderr]     | ------------------------------------------------------------------------------- in this macro invocation
Dec 12 16:48:59.548 INFO [stderr] 
Dec 12 16:48:59.554 INFO [stderr] warning: variable does not need to be mutable
Dec 12 16:48:59.555 INFO [stderr]    --> benches/throughput.rs:112:21
Dec 12 16:48:59.555 INFO [stderr]     |
Dec 12 16:48:59.555 INFO [stderr] 112 |                 let mut done = &mut [false, false, false, false];
Dec 12 16:48:59.555 INFO [stderr]     |                     ----^^^^
Dec 12 16:48:59.555 INFO [stderr]     |                     |
Dec 12 16:48:59.555 INFO [stderr]     |                     help: remove this `mut`
Dec 12 16:48:59.555 INFO [stderr] ...
Dec 12 16:48:59.555 INFO [stderr] 157 | bench_select_no_init!(select_no_init_chan_async, chan::async());
Dec 12 16:48:59.555 INFO [stderr]     | ---------------------------------------------------------------- in this macro invocation
Dec 12 16:48:59.555 INFO [stderr] 
Dec 12 16:48:59.564 INFO [stderr] warning: variable does not need to be mutable
Dec 12 16:48:59.564 INFO [stderr]    --> benches/throughput.rs:182:21
Dec 12 16:48:59.564 INFO [stderr]     |
Dec 12 16:48:59.564 INFO [stderr] 182 |                 let mut done = &mut [false, false, false, false];
Dec 12 16:48:59.564 INFO [stderr]     |                     ----^^^^
Dec 12 16:48:59.564 INFO [stderr]     |                     |
Dec 12 16:48:59.564 INFO [stderr]     |                     help: remove this `mut`
Dec 12 16:48:59.564 INFO [stderr] ...
Dec 12 16:48:59.564 INFO [stderr] 225 | bench_select_with_init!(select_with_init_chan_sync_unbuffered, chan::sync(0));
Dec 12 16:48:59.564 INFO [stderr]     | ------------------------------------------------------------------------------ in this macro invocation
Dec 12 16:48:59.564 INFO [stderr] 
Dec 12 16:48:59.566 INFO [stderr] warning: variable does not need to be mutable
Dec 12 16:48:59.566 INFO [stderr]    --> benches/throughput.rs:182:21
Dec 12 16:48:59.566 INFO [stderr]     |
Dec 12 16:48:59.566 INFO [stderr] 182 |                 let mut done = &mut [false, false, false, false];
Dec 12 16:48:59.566 INFO [stderr]     |                     ----^^^^
Dec 12 16:48:59.566 INFO [stderr]     |                     |
Dec 12 16:48:59.566 INFO [stderr]     |                     help: remove this `mut`
Dec 12 16:48:59.566 INFO [stderr] ...
Dec 12 16:48:59.566 INFO [stderr] 226 | bench_select_with_init!(select_with_init_chan_sync_buffered, chan::sync(1));
Dec 12 16:48:59.566 INFO [stderr]     | ---------------------------------------------------------------------------- in this macro invocation
Dec 12 16:48:59.566 INFO [stderr] 
Dec 12 16:48:59.571 INFO [stderr] warning: variable does not need to be mutable
Dec 12 16:48:59.572 INFO [stderr]    --> benches/throughput.rs:182:21
Dec 12 16:48:59.572 INFO [stderr]     |
Dec 12 16:48:59.572 INFO [stderr] 182 |                 let mut done = &mut [false, false, false, false];
Dec 12 16:48:59.572 INFO [stderr]     |                     ----^^^^
Dec 12 16:48:59.572 INFO [stderr]     |                     |
Dec 12 16:48:59.572 INFO [stderr]     |                     help: remove this `mut`
Dec 12 16:48:59.572 INFO [stderr] ...
Dec 12 16:48:59.572 INFO [stderr] 227 | bench_select_with_init!(select_with_init_chan_sync_buffered_all, chan::sync(1000));
Dec 12 16:48:59.572 INFO [stderr]     | ----------------------------------------------------------------------------------- in this macro invocation
Dec 12 16:48:59.572 INFO [stderr] 
Dec 12 16:48:59.591 INFO [stderr] warning: variable does not need to be mutable
Dec 12 16:48:59.591 INFO [stderr]    --> benches/throughput.rs:182:21
Dec 12 16:48:59.591 INFO [stderr]     |
Dec 12 16:48:59.591 INFO [stderr] 182 |                 let mut done = &mut [false, false, false, false];
Dec 12 16:48:59.591 INFO [stderr]     |                     ----^^^^
Dec 12 16:48:59.591 INFO [stderr]     |                     |
Dec 12 16:48:59.591 INFO [stderr]     |                     help: remove this `mut`
Dec 12 16:48:59.591 INFO [stderr] ...
Dec 12 16:48:59.591 INFO [stderr] 228 | bench_select_with_init!(select_with_init_chan_async, chan::async());
Dec 12 16:48:59.591 INFO [stderr]     | -------------------------------------------------------------------- in this macro invocation
Dec 12 16:48:59.591 INFO [stderr] 
Dec 12 16:49:01.536 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.40s
Dec 12 16:49:01.542 INFO [stderr] su: No module specific data is present
Dec 12 16:49:02.410 INFO running `"docker" "inspect" "eaf510decf7b7664fa63906cf7ce703165693570c5bbba9e07a0d8edcc3b950f"`
Dec 12 16:49:02.730 INFO running `"docker" "rm" "-f" "eaf510decf7b7664fa63906cf7ce703165693570c5bbba9e07a0d8edcc3b950f"`
Dec 12 16:49:03.184 INFO [stdout] eaf510decf7b7664fa63906cf7ce703165693570c5bbba9e07a0d8edcc3b950f