Dec 18 08:24:26.782 INFO checking BenjaminGuenin/rust-programming-tutorial against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 08:24:26.783 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/BenjaminGuenin/rust-programming-tutorial:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 08:24:27.064 INFO [stdout] e93e4c494995f9b0aa652621add308d5f6892b49482054f83c9113fd78ec9f1f
Dec 18 08:24:27.072 INFO running `"docker" "start" "-a" "e93e4c494995f9b0aa652621add308d5f6892b49482054f83c9113fd78ec9f1f"`
Dec 18 08:24:27.698 INFO [stderr]     Checking rust-programming-tutorial v0.1.0 (/opt/crater/workdir)
Dec 18 08:24:27.908 INFO [stderr] warning: unused variable: `immutable_string`
Dec 18 08:24:27.908 INFO [stderr]  --> src/main.rs:3:9
Dec 18 08:24:27.908 INFO [stderr]   |
Dec 18 08:24:27.908 INFO [stderr] 3 |     let immutable_string = "hello"; // cannot be modified - stored on the stack
Dec 18 08:24:27.908 INFO [stderr]   |         ^^^^^^^^^^^^^^^^ help: consider using `_immutable_string` instead
Dec 18 08:24:27.909 INFO [stderr]   |
Dec 18 08:24:27.909 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 18 08:24:27.909 INFO [stderr] 
Dec 18 08:24:27.909 INFO [stderr] warning: unused variable: `s`
Dec 18 08:24:27.909 INFO [stderr]   --> src/main.rs:11:13
Dec 18 08:24:27.909 INFO [stderr]    |
Dec 18 08:24:27.909 INFO [stderr] 11 |         let s = String::from("hello"); // s is valid from this point forward
Dec 18 08:24:27.909 INFO [stderr]    |             ^ help: consider using `_s` instead
Dec 18 08:24:27.909 INFO [stderr] 
Dec 18 08:24:28.060 INFO [stderr] warning: unused variable: `immutable_string`
Dec 18 08:24:28.060 INFO [stderr]  --> src/main.rs:3:9
Dec 18 08:24:28.061 INFO [stderr]   |
Dec 18 08:24:28.061 INFO [stderr] 3 |     let immutable_string = "hello"; // cannot be modified - stored on the stack
Dec 18 08:24:28.061 INFO [stderr]   |         ^^^^^^^^^^^^^^^^ help: consider using `_immutable_string` instead
Dec 18 08:24:28.061 INFO [stderr]   |
Dec 18 08:24:28.061 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 18 08:24:28.062 INFO [stderr] 
Dec 18 08:24:28.062 INFO [stderr] warning: unused variable: `s`
Dec 18 08:24:28.062 INFO [stderr]   --> src/main.rs:11:13
Dec 18 08:24:28.062 INFO [stderr]    |
Dec 18 08:24:28.062 INFO [stderr] 11 |         let s = String::from("hello"); // s is valid from this point forward
Dec 18 08:24:28.062 INFO [stderr]    |             ^ help: consider using `_s` instead
Dec 18 08:24:28.062 INFO [stderr] 
Dec 18 08:24:28.085 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
Dec 18 08:24:28.467 INFO running `"docker" "inspect" "e93e4c494995f9b0aa652621add308d5f6892b49482054f83c9113fd78ec9f1f"`
Dec 18 08:24:28.639 INFO running `"docker" "rm" "-f" "e93e4c494995f9b0aa652621add308d5f6892b49482054f83c9113fd78ec9f1f"`
Dec 18 08:24:28.856 INFO [stdout] e93e4c494995f9b0aa652621add308d5f6892b49482054f83c9113fd78ec9f1f