Dec 12 08:07:48.009 INFO checking rusty-santa-0.1.0 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 08:07:48.009 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-5/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 12 08:07:48.472 INFO [stdout] 1f6300c1890c08fc61fd8c12828b0f356d94d7b40142ff71251eacbd2349f0b6
Dec 12 08:07:48.472 INFO running `"docker" "start" "-a" "1f6300c1890c08fc61fd8c12828b0f356d94d7b40142ff71251eacbd2349f0b6"`
Dec 12 08:07:50.008 INFO [stderr] usermod: no changes
Dec 12 08:07:50.124 INFO [stderr]     Checking rusty-santa v0.1.0 (/source)
Dec 12 08:07:51.564 INFO [stderr] warning: method is never used: `get`
Dec 12 08:07:51.564 INFO [stderr]   --> src/lib.rs:64:5
Dec 12 08:07:51.564 INFO [stderr]    |
Dec 12 08:07:51.564 INFO [stderr] 64 |     pub fn get(&self, x: &str, y: &str) -> bool {
Dec 12 08:07:51.564 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 08:07:51.564 INFO [stderr]    |
Dec 12 08:07:51.564 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 08:07:51.564 INFO [stderr] 
Dec 12 08:07:51.564 INFO [stderr] warning: method is never used: `size`
Dec 12 08:07:51.564 INFO [stderr]    --> src/lib.rs:103:5
Dec 12 08:07:51.564 INFO [stderr]     |
Dec 12 08:07:51.564 INFO [stderr] 103 |     pub fn size(&self) -> usize {
Dec 12 08:07:51.564 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 08:07:51.564 INFO [stderr] 
Dec 12 08:07:51.968 INFO [stderr] warning: unused variable: `i`
Dec 12 08:07:51.972 INFO [stderr]    --> src/lib.rs:357:13
Dec 12 08:07:51.972 INFO [stderr]     |
Dec 12 08:07:51.972 INFO [stderr] 357 |         for i in 0..1000 {
Dec 12 08:07:51.972 INFO [stderr]     |             ^ help: consider using `_i` instead
Dec 12 08:07:51.972 INFO [stderr]     |
Dec 12 08:07:51.972 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 12 08:07:51.972 INFO [stderr] 
Dec 12 08:07:52.004 INFO [stderr] warning: variable does not need to be mutable
Dec 12 08:07:52.004 INFO [stderr]    --> src/lib.rs:279:13
Dec 12 08:07:52.004 INFO [stderr]     |
Dec 12 08:07:52.004 INFO [stderr] 279 |         let mut matrix = Matrix::new(keys);
Dec 12 08:07:52.004 INFO [stderr]     |             ----^^^^^^
Dec 12 08:07:52.004 INFO [stderr]     |             |
Dec 12 08:07:52.004 INFO [stderr]     |             help: remove this `mut`
Dec 12 08:07:52.004 INFO [stderr]     |
Dec 12 08:07:52.004 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 08:07:52.004 INFO [stderr] 
Dec 12 08:07:52.012 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 08:07:52.012 INFO [stderr]    --> src/lib.rs:358:13
Dec 12 08:07:52.012 INFO [stderr]     |
Dec 12 08:07:52.012 INFO [stderr] 358 |             group.assign();
Dec 12 08:07:52.012 INFO [stderr]     |             ^^^^^^^^^^^^^^^
Dec 12 08:07:52.012 INFO [stderr]     |
Dec 12 08:07:52.012 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 12 08:07:52.012 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 08:07:52.012 INFO [stderr] 
Dec 12 08:07:53.035 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.98s
Dec 12 08:07:53.035 INFO [stderr] su: No module specific data is present
Dec 12 08:07:53.397 INFO running `"docker" "inspect" "1f6300c1890c08fc61fd8c12828b0f356d94d7b40142ff71251eacbd2349f0b6"`
Dec 12 08:07:53.530 INFO running `"docker" "rm" "-f" "1f6300c1890c08fc61fd8c12828b0f356d94d7b40142ff71251eacbd2349f0b6"`
Dec 12 08:07:53.648 INFO [stdout] 1f6300c1890c08fc61fd8c12828b0f356d94d7b40142ff71251eacbd2349f0b6