Nov 18 14:35:34.384 INFO testing fast_io-1.2.2 against master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c for pr-55982
Nov 18 14:35:34.384 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-6/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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"`
Nov 18 14:35:34.608 INFO [stdout] e3e9beed4422efc63ca6f173c210289b41e926b44a1795ec0b41473eab1e82b9
Nov 18 14:35:34.612 INFO running `"docker" "start" "-a" "e3e9beed4422efc63ca6f173c210289b41e926b44a1795ec0b41473eab1e82b9"`
Nov 18 14:35:35.155 INFO [stderr] usermod: no changes
Nov 18 14:35:35.203 INFO [stderr]    Compiling fast_io v1.2.2 (/source)
Nov 18 14:35:35.635 INFO [stderr] warning: variable does not need to be mutable
Nov 18 14:35:35.635 INFO [stderr]   --> src/copy_io.rs:17:13
Nov 18 14:35:35.635 INFO [stderr]    |
Nov 18 14:35:35.635 INFO [stderr] 17 |         let mut buffer = unsafe {
Nov 18 14:35:35.635 INFO [stderr]    |             ----^^^^^^
Nov 18 14:35:35.635 INFO [stderr]    |             |
Nov 18 14:35:35.635 INFO [stderr]    |             help: remove this `mut`
Nov 18 14:35:35.635 INFO [stderr]    |
Nov 18 14:35:35.635 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 18 14:35:35.635 INFO [stderr] 
Nov 18 14:35:35.635 INFO [stderr] warning: variable does not need to be mutable
Nov 18 14:35:35.635 INFO [stderr]   --> src/copy_io.rs:38:17
Nov 18 14:35:35.635 INFO [stderr]    |
Nov 18 14:35:35.635 INFO [stderr] 38 |             let mut buffer = slice::from_raw_parts_mut(
Nov 18 14:35:35.635 INFO [stderr]    |                 ----^^^^^^
Nov 18 14:35:35.635 INFO [stderr]    |                 |
Nov 18 14:35:35.635 INFO [stderr]    |                 help: remove this `mut`
Nov 18 14:35:35.635 INFO [stderr] 
Nov 18 14:35:35.679 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
Nov 18 14:35:35.680 INFO [stderr] su: No module specific data is present
Nov 18 14:35:36.140 INFO running `"docker" "inspect" "e3e9beed4422efc63ca6f173c210289b41e926b44a1795ec0b41473eab1e82b9"`
Nov 18 14:35:36.308 INFO running `"docker" "rm" "-f" "e3e9beed4422efc63ca6f173c210289b41e926b44a1795ec0b41473eab1e82b9"`
Nov 18 14:35:36.504 INFO [stdout] e3e9beed4422efc63ca6f173c210289b41e926b44a1795ec0b41473eab1e82b9
Nov 18 14:35:36.509 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-6/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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"`
Nov 18 14:35:36.778 INFO [stdout] e269f0d8aeac46e121092cb595fa8245e479ed91cb7621177f8f0d4e1756d3a9
Nov 18 14:35:36.780 INFO running `"docker" "start" "-a" "e269f0d8aeac46e121092cb595fa8245e479ed91cb7621177f8f0d4e1756d3a9"`
Nov 18 14:35:37.815 INFO [stderr] usermod: no changes
Nov 18 14:35:37.875 INFO [stderr]    Compiling fast_io v1.2.2 (/source)
Nov 18 14:35:38.564 INFO [stderr] warning: variable does not need to be mutable
Nov 18 14:35:38.564 INFO [stderr]   --> src/copy_io.rs:17:13
Nov 18 14:35:38.564 INFO [stderr]    |
Nov 18 14:35:38.564 INFO [stderr] 17 |         let mut buffer = unsafe {
Nov 18 14:35:38.564 INFO [stderr]    |             ----^^^^^^
Nov 18 14:35:38.564 INFO [stderr]    |             |
Nov 18 14:35:38.564 INFO [stderr]    |             help: remove this `mut`
Nov 18 14:35:38.564 INFO [stderr]    |
Nov 18 14:35:38.564 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 18 14:35:38.564 INFO [stderr] 
Nov 18 14:35:38.567 INFO [stderr] warning: variable does not need to be mutable
Nov 18 14:35:38.567 INFO [stderr]   --> src/copy_io.rs:38:17
Nov 18 14:35:38.567 INFO [stderr]    |
Nov 18 14:35:38.567 INFO [stderr] 38 |             let mut buffer = slice::from_raw_parts_mut(
Nov 18 14:35:38.567 INFO [stderr]    |                 ----^^^^^^
Nov 18 14:35:38.567 INFO [stderr]    |                 |
Nov 18 14:35:38.567 INFO [stderr]    |                 help: remove this `mut`
Nov 18 14:35:38.567 INFO [stderr] 
Nov 18 14:35:39.003 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
Nov 18 14:35:39.005 INFO [stderr] su: No module specific data is present
Nov 18 14:35:39.290 INFO running `"docker" "inspect" "e269f0d8aeac46e121092cb595fa8245e479ed91cb7621177f8f0d4e1756d3a9"`
Nov 18 14:35:39.418 INFO running `"docker" "rm" "-f" "e269f0d8aeac46e121092cb595fa8245e479ed91cb7621177f8f0d4e1756d3a9"`
Nov 18 14:35:39.549 INFO [stdout] e269f0d8aeac46e121092cb595fa8245e479ed91cb7621177f8f0d4e1756d3a9