Nov 29 01:44:39.483 INFO checking fast_io-1.2.2 against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 29 01:44:39.483 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-3/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/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 +db42d4dad33013eba11ef37342ad9f614e5652b8-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 01:44:39.894 INFO [stdout] 16cc1ef9ee22712a33589e1a242af382ec087d35147c2e060b11e6f379a20abf
Nov 29 01:44:39.896 INFO running `"docker" "start" "-a" "16cc1ef9ee22712a33589e1a242af382ec087d35147c2e060b11e6f379a20abf"`
Nov 29 01:44:41.183 INFO [stderr] usermod: no changes
Nov 29 01:44:41.264 INFO [stderr]     Checking fast_io v1.2.2 (/source)
Nov 29 01:44:42.324 INFO [stderr] warning: variable does not need to be mutable
Nov 29 01:44:42.324 INFO [stderr]   --> src/copy_io.rs:17:13
Nov 29 01:44:42.324 INFO [stderr]    |
Nov 29 01:44:42.324 INFO [stderr] 17 |         let mut buffer = unsafe {
Nov 29 01:44:42.324 INFO [stderr]    |             ----^^^^^^
Nov 29 01:44:42.324 INFO [stderr]    |             |
Nov 29 01:44:42.324 INFO [stderr]    |             help: remove this `mut`
Nov 29 01:44:42.324 INFO [stderr]    |
Nov 29 01:44:42.324 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 29 01:44:42.324 INFO [stderr] 
Nov 29 01:44:42.324 INFO [stderr] warning: variable does not need to be mutable
Nov 29 01:44:42.324 INFO [stderr]   --> src/copy_io.rs:38:17
Nov 29 01:44:42.324 INFO [stderr]    |
Nov 29 01:44:42.324 INFO [stderr] 38 |             let mut buffer = slice::from_raw_parts_mut(
Nov 29 01:44:42.324 INFO [stderr]    |                 ----^^^^^^
Nov 29 01:44:42.324 INFO [stderr]    |                 |
Nov 29 01:44:42.324 INFO [stderr]    |                 help: remove this `mut`
Nov 29 01:44:42.324 INFO [stderr] 
Nov 29 01:44:42.488 INFO [stderr] warning: variable does not need to be mutable
Nov 29 01:44:42.488 INFO [stderr]   --> src/copy_io.rs:17:13
Nov 29 01:44:42.488 INFO [stderr]    |
Nov 29 01:44:42.488 INFO [stderr] 17 |         let mut buffer = unsafe {
Nov 29 01:44:42.488 INFO [stderr]    |             ----^^^^^^
Nov 29 01:44:42.488 INFO [stderr]    |             |
Nov 29 01:44:42.488 INFO [stderr]    |             help: remove this `mut`
Nov 29 01:44:42.488 INFO [stderr]    |
Nov 29 01:44:42.488 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 29 01:44:42.488 INFO [stderr] 
Nov 29 01:44:42.492 INFO [stderr] warning: variable does not need to be mutable
Nov 29 01:44:42.492 INFO [stderr]   --> src/copy_io.rs:38:17
Nov 29 01:44:42.492 INFO [stderr]    |
Nov 29 01:44:42.492 INFO [stderr] 38 |             let mut buffer = slice::from_raw_parts_mut(
Nov 29 01:44:42.492 INFO [stderr]    |                 ----^^^^^^
Nov 29 01:44:42.492 INFO [stderr]    |                 |
Nov 29 01:44:42.492 INFO [stderr]    |                 help: remove this `mut`
Nov 29 01:44:42.492 INFO [stderr] 
Nov 29 01:44:42.528 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.32s
Nov 29 01:44:42.537 INFO [stderr] su: No module specific data is present
Nov 29 01:44:43.092 INFO running `"docker" "inspect" "16cc1ef9ee22712a33589e1a242af382ec087d35147c2e060b11e6f379a20abf"`
Nov 29 01:44:43.282 INFO running `"docker" "rm" "-f" "16cc1ef9ee22712a33589e1a242af382ec087d35147c2e060b11e6f379a20abf"`
Nov 29 01:44:43.600 INFO [stdout] 16cc1ef9ee22712a33589e1a242af382ec087d35147c2e060b11e6f379a20abf