Dec 05 03:19:35.228 INFO checking BenjaminGuenin/rust-programming-tutorial against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 05 03:19:35.228 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-2/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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"`
Dec 05 03:19:35.553 INFO [stdout] 2b7b1ac2bd949a7641fed18e584a516e3e904f2b7afced2a983dcecd224bb509
Dec 05 03:19:35.556 INFO running `"docker" "start" "-a" "2b7b1ac2bd949a7641fed18e584a516e3e904f2b7afced2a983dcecd224bb509"`
Dec 05 03:19:36.013 INFO [stderr] usermod: no changes
Dec 05 03:19:36.044 INFO [stderr]     Checking rust-programming-tutorial v0.1.0 (/source)
Dec 05 03:19:36.335 INFO [stderr] warning: unused variable: `immutable_string`
Dec 05 03:19:36.335 INFO [stderr]  --> src/main.rs:3:9
Dec 05 03:19:36.335 INFO [stderr]   |
Dec 05 03:19:36.335 INFO [stderr] 3 |     let immutable_string = "hello"; // cannot be modified - stored on the stack
Dec 05 03:19:36.335 INFO [stderr]   |         ^^^^^^^^^^^^^^^^ help: consider using `_immutable_string` instead
Dec 05 03:19:36.335 INFO [stderr]   |
Dec 05 03:19:36.335 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 05 03:19:36.335 INFO [stderr] 
Dec 05 03:19:36.335 INFO [stderr] warning: unused variable: `s`
Dec 05 03:19:36.335 INFO [stderr]   --> src/main.rs:11:13
Dec 05 03:19:36.335 INFO [stderr]    |
Dec 05 03:19:36.335 INFO [stderr] 11 |         let s = String::from("hello"); // s is valid from this point forward
Dec 05 03:19:36.335 INFO [stderr]    |             ^ help: consider using `_s` instead
Dec 05 03:19:36.335 INFO [stderr] 
Dec 05 03:19:36.524 INFO [stderr] warning: unused variable: `immutable_string`
Dec 05 03:19:36.524 INFO [stderr]  --> src/main.rs:3:9
Dec 05 03:19:36.524 INFO [stderr]   |
Dec 05 03:19:36.524 INFO [stderr] 3 |     let immutable_string = "hello"; // cannot be modified - stored on the stack
Dec 05 03:19:36.525 INFO [stderr]   |         ^^^^^^^^^^^^^^^^ help: consider using `_immutable_string` instead
Dec 05 03:19:36.525 INFO [stderr]   |
Dec 05 03:19:36.525 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 05 03:19:36.525 INFO [stderr] 
Dec 05 03:19:36.526 INFO [stderr] warning: unused variable: `s`
Dec 05 03:19:36.526 INFO [stderr]   --> src/main.rs:11:13
Dec 05 03:19:36.526 INFO [stderr]    |
Dec 05 03:19:36.526 INFO [stderr] 11 |         let s = String::from("hello"); // s is valid from this point forward
Dec 05 03:19:36.527 INFO [stderr]    |             ^ help: consider using `_s` instead
Dec 05 03:19:36.527 INFO [stderr] 
Dec 05 03:19:36.563 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
Dec 05 03:19:36.569 INFO [stderr] su: No module specific data is present
Dec 05 03:19:37.232 INFO running `"docker" "inspect" "2b7b1ac2bd949a7641fed18e584a516e3e904f2b7afced2a983dcecd224bb509"`
Dec 05 03:19:37.553 INFO running `"docker" "rm" "-f" "2b7b1ac2bd949a7641fed18e584a516e3e904f2b7afced2a983dcecd224bb509"`
Dec 05 03:19:37.839 INFO [stdout] 2b7b1ac2bd949a7641fed18e584a516e3e904f2b7afced2a983dcecd224bb509