Dec 17 11:56:58.612 INFO checking wilcoxky/rust-hw04 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 11:56:58.612 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/wilcoxky/rust-hw04:/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 17 11:56:59.224 INFO [stdout] 6d80c405305afb6da4370de14d94ced13df7eeffe3eea5c58c10f5bcffb3c5fb
Dec 17 11:56:59.230 INFO running `"docker" "start" "-a" "6d80c405305afb6da4370de14d94ced13df7eeffe3eea5c58c10f5bcffb3c5fb"`
Dec 17 11:57:00.989 INFO [stderr]     Checking libc v0.2.31
Dec 17 11:57:01.896 INFO [stderr]     Checking rand v0.3.16
Dec 17 11:57:03.084 INFO [stderr]     Checking hw04 v0.1.0 (/opt/crater/workdir)
Dec 17 11:57:03.282 INFO [stderr] warning: unused variable: `result`
Dec 17 11:57:03.282 INFO [stderr]   --> src/main.rs:27:13
Dec 17 11:57:03.282 INFO [stderr]    |
Dec 17 11:57:03.282 INFO [stderr] 27 |         let result = evaluate_line(&mut stack, &buffer);
Dec 17 11:57:03.282 INFO [stderr]    |             ^^^^^^ help: consider using `_result` instead
Dec 17 11:57:03.282 INFO [stderr]    |
Dec 17 11:57:03.282 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 11:57:03.282 INFO [stderr] 
Dec 17 11:57:03.302 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 11:57:03.302 INFO [stderr]    --> src/rpn.rs:124:21
Dec 17 11:57:03.302 INFO [stderr]     |
Dec 17 11:57:03.302 INFO [stderr] 124 |                     self.push(n);
Dec 17 11:57:03.302 INFO [stderr]     |                     ^^^^^^^^^^^^^
Dec 17 11:57:03.302 INFO [stderr]     |
Dec 17 11:57:03.302 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 17 11:57:03.302 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 11:57:03.302 INFO [stderr] 
Dec 17 11:57:03.302 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 11:57:03.302 INFO [stderr]    --> src/rpn.rs:133:21
Dec 17 11:57:03.302 INFO [stderr]     |
Dec 17 11:57:03.302 INFO [stderr] 133 |                     self.push(first.unwrap());
Dec 17 11:57:03.302 INFO [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 11:57:03.302 INFO [stderr]     |
Dec 17 11:57:03.302 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 11:57:03.302 INFO [stderr] 
Dec 17 11:57:03.448 INFO [stderr] warning: unused variable: `result`
Dec 17 11:57:03.448 INFO [stderr]   --> src/main.rs:27:13
Dec 17 11:57:03.448 INFO [stderr]    |
Dec 17 11:57:03.448 INFO [stderr] 27 |         let result = evaluate_line(&mut stack, &buffer);
Dec 17 11:57:03.448 INFO [stderr]    |             ^^^^^^ help: consider using `_result` instead
Dec 17 11:57:03.448 INFO [stderr]    |
Dec 17 11:57:03.448 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 11:57:03.448 INFO [stderr] 
Dec 17 11:57:03.504 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 11:57:03.504 INFO [stderr]    --> src/rpn.rs:124:21
Dec 17 11:57:03.504 INFO [stderr]     |
Dec 17 11:57:03.504 INFO [stderr] 124 |                     self.push(n);
Dec 17 11:57:03.504 INFO [stderr]     |                     ^^^^^^^^^^^^^
Dec 17 11:57:03.504 INFO [stderr]     |
Dec 17 11:57:03.504 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 17 11:57:03.504 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 11:57:03.504 INFO [stderr] 
Dec 17 11:57:03.504 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 11:57:03.504 INFO [stderr]    --> src/rpn.rs:133:21
Dec 17 11:57:03.504 INFO [stderr]     |
Dec 17 11:57:03.504 INFO [stderr] 133 |                     self.push(first.unwrap());
Dec 17 11:57:03.504 INFO [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 11:57:03.504 INFO [stderr]     |
Dec 17 11:57:03.505 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 11:57:03.505 INFO [stderr] 
Dec 17 11:57:03.552 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.59s
Dec 17 11:57:04.180 INFO running `"docker" "inspect" "6d80c405305afb6da4370de14d94ced13df7eeffe3eea5c58c10f5bcffb3c5fb"`
Dec 17 11:57:04.466 INFO running `"docker" "rm" "-f" "6d80c405305afb6da4370de14d94ced13df7eeffe3eea5c58c10f5bcffb3c5fb"`
Dec 17 11:57:04.708 INFO [stdout] 6d80c405305afb6da4370de14d94ced13df7eeffe3eea5c58c10f5bcffb3c5fb