Dec 05 03:19:32.506 INFO checking BenjaminGuenin/rust-programming-tutorial against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 05 03:19:32.506 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-2/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-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 03:19:32.743 INFO [stdout] 51fba03760a3b02a1f24e421caec90dfa5c1c73643159cd8e4f25a53bd7141fd
Dec 05 03:19:32.751 INFO running `"docker" "start" "-a" "51fba03760a3b02a1f24e421caec90dfa5c1c73643159cd8e4f25a53bd7141fd"`
Dec 05 03:19:33.148 INFO [stderr] usermod: no changes
Dec 05 03:19:33.204 INFO [stderr]     Checking rust-programming-tutorial v0.1.0 (/source)
Dec 05 03:19:33.903 INFO [stderr] warning: unused variable: `immutable_string`
Dec 05 03:19:33.903 INFO [stderr]  --> src/main.rs:3:9
Dec 05 03:19:33.903 INFO [stderr]   |
Dec 05 03:19:33.904 INFO [stderr] 3 |     let immutable_string = "hello"; // cannot be modified - stored on the stack
Dec 05 03:19:33.904 INFO [stderr]   |         ^^^^^^^^^^^^^^^^ help: consider using `_immutable_string` instead
Dec 05 03:19:33.904 INFO [stderr]   |
Dec 05 03:19:33.904 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 05 03:19:33.904 INFO [stderr] 
Dec 05 03:19:33.904 INFO [stderr] warning: unused variable: `s`
Dec 05 03:19:33.905 INFO [stderr]   --> src/main.rs:11:13
Dec 05 03:19:33.905 INFO [stderr]    |
Dec 05 03:19:33.905 INFO [stderr] 11 |         let s = String::from("hello"); // s is valid from this point forward
Dec 05 03:19:33.905 INFO [stderr]    |             ^ help: consider using `_s` instead
Dec 05 03:19:33.905 INFO [stderr] 
Dec 05 03:19:34.042 INFO [stderr] warning: unused variable: `immutable_string`
Dec 05 03:19:34.042 INFO [stderr]  --> src/main.rs:3:9
Dec 05 03:19:34.042 INFO [stderr]   |
Dec 05 03:19:34.042 INFO [stderr] 3 |     let immutable_string = "hello"; // cannot be modified - stored on the stack
Dec 05 03:19:34.043 INFO [stderr]   |         ^^^^^^^^^^^^^^^^ help: consider using `_immutable_string` instead
Dec 05 03:19:34.043 INFO [stderr]   |
Dec 05 03:19:34.043 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 05 03:19:34.043 INFO [stderr] 
Dec 05 03:19:34.043 INFO [stderr] warning: unused variable: `s`
Dec 05 03:19:34.043 INFO [stderr]   --> src/main.rs:11:13
Dec 05 03:19:34.043 INFO [stderr]    |
Dec 05 03:19:34.043 INFO [stderr] 11 |         let s = String::from("hello"); // s is valid from this point forward
Dec 05 03:19:34.043 INFO [stderr]    |             ^ help: consider using `_s` instead
Dec 05 03:19:34.043 INFO [stderr] 
Dec 05 03:19:34.070 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
Dec 05 03:19:34.078 INFO [stderr] su: No module specific data is present
Dec 05 03:19:34.763 INFO running `"docker" "inspect" "51fba03760a3b02a1f24e421caec90dfa5c1c73643159cd8e4f25a53bd7141fd"`
Dec 05 03:19:34.927 INFO running `"docker" "rm" "-f" "51fba03760a3b02a1f24e421caec90dfa5c1c73643159cd8e4f25a53bd7141fd"`
Dec 05 03:19:35.078 INFO [stdout] 51fba03760a3b02a1f24e421caec90dfa5c1c73643159cd8e4f25a53bd7141fd