Dec 05 05:49:40.232 INFO checking tap-0.3.0 against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 05 05:49:40.232 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-4/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/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 05:49:40.638 INFO [stdout] 9452b6dae698e413597958b30cfb068836a499a6ce6489760fb013b8702e300f
Dec 05 05:49:40.640 INFO running `"docker" "start" "-a" "9452b6dae698e413597958b30cfb068836a499a6ce6489760fb013b8702e300f"`
Dec 05 05:49:41.757 INFO [stderr] usermod: no changes
Dec 05 05:49:41.855 INFO [stderr]     Checking tap v0.3.0 (/source)
Dec 05 05:49:42.415 INFO [stderr] warning: variable does not need to be mutable
Dec 05 05:49:42.415 INFO [stderr]   --> src/lib.rs:78:21
Dec 05 05:49:42.415 INFO [stderr]    |
Dec 05 05:49:42.415 INFO [stderr] 78 |         if let Some(mut val) = self.as_mut() {
Dec 05 05:49:42.415 INFO [stderr]    |                     ----^^^
Dec 05 05:49:42.415 INFO [stderr]    |                     |
Dec 05 05:49:42.415 INFO [stderr]    |                     help: remove this `mut`
Dec 05 05:49:42.415 INFO [stderr]    |
Dec 05 05:49:42.415 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 05:49:42.415 INFO [stderr] 
Dec 05 05:49:42.523 INFO [stderr] warning: unused `#[macro_use]` import
Dec 05 05:49:42.523 INFO [stderr]   --> src/lib.rs:14:18
Dec 05 05:49:42.523 INFO [stderr]    |
Dec 05 05:49:42.523 INFO [stderr] 14 | #[cfg_attr(test, macro_use)]
Dec 05 05:49:42.523 INFO [stderr]    |                  ^^^^^^^^^
Dec 05 05:49:42.523 INFO [stderr]    |
Dec 05 05:49:42.523 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 05 05:49:42.523 INFO [stderr] 
Dec 05 05:49:42.653 INFO [stderr] warning: variable does not need to be mutable
Dec 05 05:49:42.653 INFO [stderr]   --> src/lib.rs:78:21
Dec 05 05:49:42.653 INFO [stderr]    |
Dec 05 05:49:42.653 INFO [stderr] 78 |         if let Some(mut val) = self.as_mut() {
Dec 05 05:49:42.653 INFO [stderr]    |                     ----^^^
Dec 05 05:49:42.653 INFO [stderr]    |                     |
Dec 05 05:49:42.653 INFO [stderr]    |                     help: remove this `mut`
Dec 05 05:49:42.653 INFO [stderr]    |
Dec 05 05:49:42.653 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 05:49:42.653 INFO [stderr] 
Dec 05 05:49:42.667 INFO [stderr] warning: variable does not need to be mutable
Dec 05 05:49:42.667 INFO [stderr]    --> src/lib.rs:141:33
Dec 05 05:49:42.667 INFO [stderr]     |
Dec 05 05:49:42.667 INFO [stderr] 141 |         let mutated = base.tap(|mut arr| for elt in arr.iter_mut() {
Dec 05 05:49:42.667 INFO [stderr]     |                                 ----^^^
Dec 05 05:49:42.667 INFO [stderr]     |                                 |
Dec 05 05:49:42.667 INFO [stderr]     |                                 help: remove this `mut`
Dec 05 05:49:42.667 INFO [stderr] 
Dec 05 05:49:43.211 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.42s
Dec 05 05:49:43.211 INFO [stderr] su: No module specific data is present
Dec 05 05:49:43.664 INFO running `"docker" "inspect" "9452b6dae698e413597958b30cfb068836a499a6ce6489760fb013b8702e300f"`
Dec 05 05:49:43.939 INFO running `"docker" "rm" "-f" "9452b6dae698e413597958b30cfb068836a499a6ce6489760fb013b8702e300f"`
Dec 05 05:49:44.133 INFO [stdout] 9452b6dae698e413597958b30cfb068836a499a6ce6489760fb013b8702e300f