Dec 15 15:14:05.187 INFO testing fast_io-1.2.2 against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 15 15:14:05.188 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 15 15:14:05.738 INFO [stdout] 68e79c2811c61235b60791c951be55a9ddfc24496f826f72b1b46b914c63af9b
Dec 15 15:14:05.741 INFO running `"docker" "start" "-a" "68e79c2811c61235b60791c951be55a9ddfc24496f826f72b1b46b914c63af9b"`
Dec 15 15:14:06.547 INFO [stderr] usermod: no changes
Dec 15 15:14:06.559 INFO [stderr]    Compiling fast_io v1.2.2 (/source)
Dec 15 15:14:07.164 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:14:07.164 INFO [stderr]   --> src/copy_io.rs:17:13
Dec 15 15:14:07.164 INFO [stderr]    |
Dec 15 15:14:07.164 INFO [stderr] 17 |         let mut buffer = unsafe {
Dec 15 15:14:07.164 INFO [stderr]    |             ----^^^^^^
Dec 15 15:14:07.164 INFO [stderr]    |             |
Dec 15 15:14:07.164 INFO [stderr]    |             help: remove this `mut`
Dec 15 15:14:07.164 INFO [stderr]    |
Dec 15 15:14:07.164 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 15 15:14:07.164 INFO [stderr] 
Dec 15 15:14:07.164 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:14:07.165 INFO [stderr]   --> src/copy_io.rs:38:17
Dec 15 15:14:07.165 INFO [stderr]    |
Dec 15 15:14:07.165 INFO [stderr] 38 |             let mut buffer = slice::from_raw_parts_mut(
Dec 15 15:14:07.165 INFO [stderr]    |                 ----^^^^^^
Dec 15 15:14:07.165 INFO [stderr]    |                 |
Dec 15 15:14:07.165 INFO [stderr]    |                 help: remove this `mut`
Dec 15 15:14:07.165 INFO [stderr] 
Dec 15 15:14:07.165 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
Dec 15 15:14:07.165 INFO [stderr] su: No module specific data is present
Dec 15 15:14:07.755 INFO running `"docker" "inspect" "68e79c2811c61235b60791c951be55a9ddfc24496f826f72b1b46b914c63af9b"`
Dec 15 15:14:07.907 INFO running `"docker" "rm" "-f" "68e79c2811c61235b60791c951be55a9ddfc24496f826f72b1b46b914c63af9b"`
Dec 15 15:14:08.107 INFO [stdout] 68e79c2811c61235b60791c951be55a9ddfc24496f826f72b1b46b914c63af9b
Dec 15 15:14:08.111 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 15 15:14:08.464 INFO [stdout] b20e044d662e95d3a144ff631b537fe0546be14a8dc47fd61b48a4b776fa9d1b
Dec 15 15:14:08.471 INFO running `"docker" "start" "-a" "b20e044d662e95d3a144ff631b537fe0546be14a8dc47fd61b48a4b776fa9d1b"`
Dec 15 15:14:09.623 INFO [stderr] usermod: no changes
Dec 15 15:14:09.679 INFO [stderr]    Compiling fast_io v1.2.2 (/source)
Dec 15 15:14:10.416 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:14:10.416 INFO [stderr]   --> src/copy_io.rs:17:13
Dec 15 15:14:10.416 INFO [stderr]    |
Dec 15 15:14:10.416 INFO [stderr] 17 |         let mut buffer = unsafe {
Dec 15 15:14:10.416 INFO [stderr]    |             ----^^^^^^
Dec 15 15:14:10.416 INFO [stderr]    |             |
Dec 15 15:14:10.416 INFO [stderr]    |             help: remove this `mut`
Dec 15 15:14:10.416 INFO [stderr]    |
Dec 15 15:14:10.416 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 15 15:14:10.416 INFO [stderr] 
Dec 15 15:14:10.418 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:14:10.418 INFO [stderr]   --> src/copy_io.rs:38:17
Dec 15 15:14:10.418 INFO [stderr]    |
Dec 15 15:14:10.418 INFO [stderr] 38 |             let mut buffer = slice::from_raw_parts_mut(
Dec 15 15:14:10.418 INFO [stderr]    |                 ----^^^^^^
Dec 15 15:14:10.418 INFO [stderr]    |                 |
Dec 15 15:14:10.418 INFO [stderr]    |                 help: remove this `mut`
Dec 15 15:14:10.418 INFO [stderr] 
Dec 15 15:14:10.918 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
Dec 15 15:14:10.918 INFO [stderr] su: No module specific data is present
Dec 15 15:14:11.151 INFO running `"docker" "inspect" "b20e044d662e95d3a144ff631b537fe0546be14a8dc47fd61b48a4b776fa9d1b"`
Dec 15 15:14:11.289 INFO running `"docker" "rm" "-f" "b20e044d662e95d3a144ff631b537fe0546be14a8dc47fd61b48a4b776fa9d1b"`
Dec 15 15:14:11.418 INFO [stdout] b20e044d662e95d3a144ff631b537fe0546be14a8dc47fd61b48a4b776fa9d1b