Nov 30 11:12:01.269 INFO checking Ermain-12/Introduction-to-Rust against master#a49316ddc99d9d595193557fc899f6c52e4d9af9 for pr-56323
Nov 30 11:12:01.269 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-7/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56323/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/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 +a49316ddc99d9d595193557fc899f6c52e4d9af9-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 30 11:12:01.754 INFO [stdout] 5d06fc1295e7b45ae9dd633fe52fdec6ea572fd46f7ae5ccad2e21e7685ec191
Nov 30 11:12:01.764 INFO running `"docker" "start" "-a" "5d06fc1295e7b45ae9dd633fe52fdec6ea572fd46f7ae5ccad2e21e7685ec191"`
Nov 30 11:12:02.859 INFO [stderr] usermod: no changes
Nov 30 11:12:02.975 INFO [stderr]     Checking hello_world v0.1.0 (/source)
Nov 30 11:12:04.228 INFO [stderr] warning: variable does not need to be mutable
Nov 30 11:12:04.228 INFO [stderr]   --> src/main.rs:27:8
Nov 30 11:12:04.228 INFO [stderr]    |
Nov 30 11:12:04.228 INFO [stderr] 27 |    let mut twenty_one = my_vec.pop();
Nov 30 11:12:04.228 INFO [stderr]    |        ----^^^^^^^^^^
Nov 30 11:12:04.229 INFO [stderr]    |        |
Nov 30 11:12:04.229 INFO [stderr]    |        help: remove this `mut`
Nov 30 11:12:04.229 INFO [stderr]    |
Nov 30 11:12:04.229 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 30 11:12:04.229 INFO [stderr] 
Nov 30 11:12:04.376 INFO [stderr] warning: variable does not need to be mutable
Nov 30 11:12:04.376 INFO [stderr]   --> src/main.rs:27:8
Nov 30 11:12:04.376 INFO [stderr]    |
Nov 30 11:12:04.376 INFO [stderr] 27 |    let mut twenty_one = my_vec.pop();
Nov 30 11:12:04.376 INFO [stderr]    |        ----^^^^^^^^^^
Nov 30 11:12:04.376 INFO [stderr]    |        |
Nov 30 11:12:04.376 INFO [stderr]    |        help: remove this `mut`
Nov 30 11:12:04.376 INFO [stderr]    |
Nov 30 11:12:04.376 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 30 11:12:04.376 INFO [stderr] 
Nov 30 11:12:04.404 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.52s
Nov 30 11:12:04.416 INFO [stderr] su: No module specific data is present
Nov 30 11:12:05.058 INFO running `"docker" "inspect" "5d06fc1295e7b45ae9dd633fe52fdec6ea572fd46f7ae5ccad2e21e7685ec191"`
Nov 30 11:12:05.278 INFO running `"docker" "rm" "-f" "5d06fc1295e7b45ae9dd633fe52fdec6ea572fd46f7ae5ccad2e21e7685ec191"`
Nov 30 11:12:05.547 INFO [stdout] 5d06fc1295e7b45ae9dd633fe52fdec6ea572fd46f7ae5ccad2e21e7685ec191