Dec 17 12:19:38.601 INFO checking vtsingaras/visafe against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 12:19:38.601 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/vtsingaras/visafe:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 12:19:39.188 INFO [stdout] 6e4dbc30dfff39607aa9aa9f34ae91046e63604766a7ca188405d3b86ecd003d
Dec 17 12:19:39.190 INFO running `"docker" "start" "-a" "6e4dbc30dfff39607aa9aa9f34ae91046e63604766a7ca188405d3b86ecd003d"`
Dec 17 12:19:41.556 INFO [stderr]     Checking argparse v0.2.1
Dec 17 12:19:42.358 INFO [stderr]     Checking visafe v0.1.0 (/opt/crater/workdir)
Dec 17 12:19:42.584 INFO [stderr] warning: variable does not need to be mutable
Dec 17 12:19:42.584 INFO [stderr]    --> src/main.rs:102:13
Dec 17 12:19:42.584 INFO [stderr]     |
Dec 17 12:19:42.584 INFO [stderr] 102 |         let mut checker_cmd = Command::new(options.checker.as_str()).arg(tmppath_str.clone()).stdout(Stdio::piped())
Dec 17 12:19:42.584 INFO [stderr]     |             ----^^^^^^^^^^^
Dec 17 12:19:42.584 INFO [stderr]     |             |
Dec 17 12:19:42.584 INFO [stderr]     |             help: remove this `mut`
Dec 17 12:19:42.584 INFO [stderr]     |
Dec 17 12:19:42.584 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 17 12:19:42.584 INFO [stderr] 
Dec 17 12:19:42.584 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 12:19:42.584 INFO [stderr]   --> src/main.rs:39:9
Dec 17 12:19:42.584 INFO [stderr]    |
Dec 17 12:19:42.584 INFO [stderr] 39 |         io::stdout().flush();
Dec 17 12:19:42.584 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:19:42.584 INFO [stderr]    |
Dec 17 12:19:42.584 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 12:19:42.584 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 12:19:42.584 INFO [stderr] 
Dec 17 12:19:42.584 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 12:19:42.584 INFO [stderr]    --> src/main.rs:100:9
Dec 17 12:19:42.584 INFO [stderr]     |
Dec 17 12:19:42.584 INFO [stderr] 100 |         editor_cmd.wait();
Dec 17 12:19:42.584 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^
Dec 17 12:19:42.584 INFO [stderr]     |
Dec 17 12:19:42.584 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 12:19:42.584 INFO [stderr] 
Dec 17 12:19:42.584 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 12:19:42.584 INFO [stderr]    --> src/main.rs:124:13
Dec 17 12:19:42.584 INFO [stderr]     |
Dec 17 12:19:42.584 INFO [stderr] 124 |             fs::remove_file(tmppath_str.clone());
Dec 17 12:19:42.584 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:19:42.584 INFO [stderr]     |
Dec 17 12:19:42.584 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 12:19:42.584 INFO [stderr] 
Dec 17 12:19:42.759 INFO [stderr] warning: variable does not need to be mutable
Dec 17 12:19:42.759 INFO [stderr]    --> src/main.rs:102:13
Dec 17 12:19:42.759 INFO [stderr]     |
Dec 17 12:19:42.759 INFO [stderr] 102 |         let mut checker_cmd = Command::new(options.checker.as_str()).arg(tmppath_str.clone()).stdout(Stdio::piped())
Dec 17 12:19:42.759 INFO [stderr]     |             ----^^^^^^^^^^^
Dec 17 12:19:42.759 INFO [stderr]     |             |
Dec 17 12:19:42.759 INFO [stderr]     |             help: remove this `mut`
Dec 17 12:19:42.759 INFO [stderr]     |
Dec 17 12:19:42.759 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 17 12:19:42.759 INFO [stderr] 
Dec 17 12:19:42.759 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 12:19:42.760 INFO [stderr]   --> src/main.rs:39:9
Dec 17 12:19:42.760 INFO [stderr]    |
Dec 17 12:19:42.760 INFO [stderr] 39 |         io::stdout().flush();
Dec 17 12:19:42.760 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:19:42.764 INFO [stderr]    |
Dec 17 12:19:42.764 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 12:19:42.764 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 12:19:42.764 INFO [stderr] 
Dec 17 12:19:42.764 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 12:19:42.764 INFO [stderr]    --> src/main.rs:100:9
Dec 17 12:19:42.764 INFO [stderr]     |
Dec 17 12:19:42.764 INFO [stderr] 100 |         editor_cmd.wait();
Dec 17 12:19:42.764 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^
Dec 17 12:19:42.764 INFO [stderr]     |
Dec 17 12:19:42.764 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 12:19:42.764 INFO [stderr] 
Dec 17 12:19:42.764 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 17 12:19:42.764 INFO [stderr]    --> src/main.rs:124:13
Dec 17 12:19:42.764 INFO [stderr]     |
Dec 17 12:19:42.764 INFO [stderr] 124 |             fs::remove_file(tmppath_str.clone());
Dec 17 12:19:42.764 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 12:19:42.764 INFO [stderr]     |
Dec 17 12:19:42.764 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 17 12:19:42.764 INFO [stderr] 
Dec 17 12:19:42.793 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
Dec 17 12:19:43.938 INFO running `"docker" "inspect" "6e4dbc30dfff39607aa9aa9f34ae91046e63604766a7ca188405d3b86ecd003d"`
Dec 17 12:19:44.256 INFO running `"docker" "rm" "-f" "6e4dbc30dfff39607aa9aa9f34ae91046e63604766a7ca188405d3b86ecd003d"`
Dec 17 12:19:44.504 INFO [stdout] 6e4dbc30dfff39607aa9aa9f34ae91046e63604766a7ca188405d3b86ecd003d