Dec 07 17:05:26.977 INFO testing fast_io-1.2.2 against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 07 17:05:27.021 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-1/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt build --frozen" "-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 07 17:05:27.241 INFO [stdout] eede9a34a3769cf2ce23e15a34eb1bfa4e640d6c3ffa12d9dfd770e3dd2bfe4c
Dec 07 17:05:27.243 INFO running `"docker" "start" "-a" "eede9a34a3769cf2ce23e15a34eb1bfa4e640d6c3ffa12d9dfd770e3dd2bfe4c"`
Dec 07 17:05:27.743 INFO [stderr] usermod: no changes
Dec 07 17:05:27.775 INFO [stderr]    Compiling fast_io v1.2.2 (/source)
Dec 07 17:05:28.296 INFO [stderr] warning: variable does not need to be mutable
Dec 07 17:05:28.297 INFO [stderr]   --> src/copy_io.rs:17:13
Dec 07 17:05:28.297 INFO [stderr]    |
Dec 07 17:05:28.297 INFO [stderr] 17 |         let mut buffer = unsafe {
Dec 07 17:05:28.298 INFO [stderr]    |             ----^^^^^^
Dec 07 17:05:28.298 INFO [stderr]    |             |
Dec 07 17:05:28.298 INFO [stderr]    |             help: remove this `mut`
Dec 07 17:05:28.299 INFO [stderr]    |
Dec 07 17:05:28.299 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 07 17:05:28.299 INFO [stderr] 
Dec 07 17:05:28.314 INFO [stderr] warning: variable does not need to be mutable
Dec 07 17:05:28.314 INFO [stderr]   --> src/copy_io.rs:38:17
Dec 07 17:05:28.314 INFO [stderr]    |
Dec 07 17:05:28.314 INFO [stderr] 38 |             let mut buffer = slice::from_raw_parts_mut(
Dec 07 17:05:28.314 INFO [stderr]    |                 ----^^^^^^
Dec 07 17:05:28.314 INFO [stderr]    |                 |
Dec 07 17:05:28.314 INFO [stderr]    |                 help: remove this `mut`
Dec 07 17:05:28.314 INFO [stderr] 
Dec 07 17:05:28.330 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
Dec 07 17:05:28.334 INFO [stderr] su: No module specific data is present
Dec 07 17:05:28.742 INFO running `"docker" "inspect" "eede9a34a3769cf2ce23e15a34eb1bfa4e640d6c3ffa12d9dfd770e3dd2bfe4c"`
Dec 07 17:05:28.836 INFO running `"docker" "rm" "-f" "eede9a34a3769cf2ce23e15a34eb1bfa4e640d6c3ffa12d9dfd770e3dd2bfe4c"`
Dec 07 17:05:28.970 INFO [stdout] eede9a34a3769cf2ce23e15a34eb1bfa4e640d6c3ffa12d9dfd770e3dd2bfe4c
Dec 07 17:05:28.972 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-1/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt test --frozen --no-run" "-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 07 17:05:29.230 INFO [stdout] 1c482d23c7c5e8b149962323cd25a3d8a6f45c11fadc42cfbcf463d5981ed9a5
Dec 07 17:05:29.233 INFO running `"docker" "start" "-a" "1c482d23c7c5e8b149962323cd25a3d8a6f45c11fadc42cfbcf463d5981ed9a5"`
Dec 07 17:05:29.740 INFO [stderr] usermod: no changes
Dec 07 17:05:29.819 INFO [stderr]    Compiling fast_io v1.2.2 (/source)
Dec 07 17:05:30.556 INFO [stderr] warning: variable does not need to be mutable
Dec 07 17:05:30.556 INFO [stderr]   --> src/copy_io.rs:17:13
Dec 07 17:05:30.556 INFO [stderr]    |
Dec 07 17:05:30.556 INFO [stderr] 17 |         let mut buffer = unsafe {
Dec 07 17:05:30.556 INFO [stderr]    |             ----^^^^^^
Dec 07 17:05:30.556 INFO [stderr]    |             |
Dec 07 17:05:30.556 INFO [stderr]    |             help: remove this `mut`
Dec 07 17:05:30.556 INFO [stderr]    |
Dec 07 17:05:30.556 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 07 17:05:30.556 INFO [stderr] 
Dec 07 17:05:30.558 INFO [stderr] warning: variable does not need to be mutable
Dec 07 17:05:30.558 INFO [stderr]   --> src/copy_io.rs:38:17
Dec 07 17:05:30.558 INFO [stderr]    |
Dec 07 17:05:30.558 INFO [stderr] 38 |             let mut buffer = slice::from_raw_parts_mut(
Dec 07 17:05:30.558 INFO [stderr]    |                 ----^^^^^^
Dec 07 17:05:30.558 INFO [stderr]    |                 |
Dec 07 17:05:30.558 INFO [stderr]    |                 help: remove this `mut`
Dec 07 17:05:30.558 INFO [stderr] 
Dec 07 17:05:31.025 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
Dec 07 17:05:31.029 INFO [stderr] su: No module specific data is present
Dec 07 17:05:31.307 INFO running `"docker" "inspect" "1c482d23c7c5e8b149962323cd25a3d8a6f45c11fadc42cfbcf463d5981ed9a5"`
Dec 07 17:05:31.387 INFO running `"docker" "rm" "-f" "1c482d23c7c5e8b149962323cd25a3d8a6f45c11fadc42cfbcf463d5981ed9a5"`
Dec 07 17:05:31.491 INFO [stdout] 1c482d23c7c5e8b149962323cd25a3d8a6f45c11fadc42cfbcf463d5981ed9a5