Dec 15 15:14:05.532 INFO testing fast_io-1.2.2 against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 15 15:14:05.532 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-5/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 15:14:05.887 INFO [stdout] 3691b561730f8646909a1f29b3f783d291f6647e82256c1a9d3ae1fc6b9cebdc
Dec 15 15:14:05.889 INFO running `"docker" "start" "-a" "3691b561730f8646909a1f29b3f783d291f6647e82256c1a9d3ae1fc6b9cebdc"`
Dec 15 15:14:06.796 INFO [stderr] usermod: no changes
Dec 15 15:14:06.796 INFO [stderr]    Compiling fast_io v1.2.2 (/source)
Dec 15 15:14:07.363 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:14:07.363 INFO [stderr]   --> src/copy_io.rs:17:13
Dec 15 15:14:07.363 INFO [stderr]    |
Dec 15 15:14:07.363 INFO [stderr] 17 |         let mut buffer = unsafe {
Dec 15 15:14:07.363 INFO [stderr]    |             ----^^^^^^
Dec 15 15:14:07.363 INFO [stderr]    |             |
Dec 15 15:14:07.363 INFO [stderr]    |             help: remove this `mut`
Dec 15 15:14:07.363 INFO [stderr]    |
Dec 15 15:14:07.363 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 15 15:14:07.363 INFO [stderr] 
Dec 15 15:14:07.375 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:14:07.375 INFO [stderr]   --> src/copy_io.rs:38:17
Dec 15 15:14:07.375 INFO [stderr]    |
Dec 15 15:14:07.375 INFO [stderr] 38 |             let mut buffer = slice::from_raw_parts_mut(
Dec 15 15:14:07.375 INFO [stderr]    |                 ----^^^^^^
Dec 15 15:14:07.375 INFO [stderr]    |                 |
Dec 15 15:14:07.375 INFO [stderr]    |                 help: remove this `mut`
Dec 15 15:14:07.375 INFO [stderr] 
Dec 15 15:14:07.421 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
Dec 15 15:14:07.423 INFO [stderr] su: No module specific data is present
Dec 15 15:14:07.932 INFO running `"docker" "inspect" "3691b561730f8646909a1f29b3f783d291f6647e82256c1a9d3ae1fc6b9cebdc"`
Dec 15 15:14:08.163 INFO running `"docker" "rm" "-f" "3691b561730f8646909a1f29b3f783d291f6647e82256c1a9d3ae1fc6b9cebdc"`
Dec 15 15:14:08.379 INFO [stdout] 3691b561730f8646909a1f29b3f783d291f6647e82256c1a9d3ae1fc6b9cebdc
Dec 15 15:14:08.381 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-5/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 15:14:08.856 INFO [stdout] 482fbcbaaaf302a01898a1a103022b572b3e236e43dc0f0ead4ca2d19d7a8cdc
Dec 15 15:14:08.860 INFO running `"docker" "start" "-a" "482fbcbaaaf302a01898a1a103022b572b3e236e43dc0f0ead4ca2d19d7a8cdc"`
Dec 15 15:14:09.876 INFO [stderr] usermod: no changes
Dec 15 15:14:09.904 INFO [stderr]    Compiling fast_io v1.2.2 (/source)
Dec 15 15:14:10.594 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:14:10.594 INFO [stderr]   --> src/copy_io.rs:17:13
Dec 15 15:14:10.594 INFO [stderr]    |
Dec 15 15:14:10.594 INFO [stderr] 17 |         let mut buffer = unsafe {
Dec 15 15:14:10.594 INFO [stderr]    |             ----^^^^^^
Dec 15 15:14:10.594 INFO [stderr]    |             |
Dec 15 15:14:10.594 INFO [stderr]    |             help: remove this `mut`
Dec 15 15:14:10.594 INFO [stderr]    |
Dec 15 15:14:10.594 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 15 15:14:10.594 INFO [stderr] 
Dec 15 15:14:10.594 INFO [stderr] warning: variable does not need to be mutable
Dec 15 15:14:10.594 INFO [stderr]   --> src/copy_io.rs:38:17
Dec 15 15:14:10.594 INFO [stderr]    |
Dec 15 15:14:10.594 INFO [stderr] 38 |             let mut buffer = slice::from_raw_parts_mut(
Dec 15 15:14:10.594 INFO [stderr]    |                 ----^^^^^^
Dec 15 15:14:10.594 INFO [stderr]    |                 |
Dec 15 15:14:10.594 INFO [stderr]    |                 help: remove this `mut`
Dec 15 15:14:10.594 INFO [stderr] 
Dec 15 15:14:11.027 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.13s
Dec 15 15:14:11.030 INFO [stderr] su: No module specific data is present
Dec 15 15:14:11.380 INFO running `"docker" "inspect" "482fbcbaaaf302a01898a1a103022b572b3e236e43dc0f0ead4ca2d19d7a8cdc"`
Dec 15 15:14:11.471 INFO running `"docker" "rm" "-f" "482fbcbaaaf302a01898a1a103022b572b3e236e43dc0f0ead4ca2d19d7a8cdc"`
Dec 15 15:14:11.580 INFO [stdout] 482fbcbaaaf302a01898a1a103022b572b3e236e43dc0f0ead4ca2d19d7a8cdc