Dec 05 05:49:40.597 INFO checking tap-0.3.0 against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 05 05:49:40.597 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-3/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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 05:49:41.089 INFO [stdout] e6aad3e8555356fbc6a0cdbc7994802b422e3bbafed2ec145950f141ca67f611
Dec 05 05:49:41.092 INFO running `"docker" "start" "-a" "e6aad3e8555356fbc6a0cdbc7994802b422e3bbafed2ec145950f141ca67f611"`
Dec 05 05:49:42.255 INFO [stderr] usermod: no changes
Dec 05 05:49:42.351 INFO [stderr]     Checking tap v0.3.0 (/source)
Dec 05 05:49:42.864 INFO [stderr] warning: variable does not need to be mutable
Dec 05 05:49:42.864 INFO [stderr]   --> src/lib.rs:78:21
Dec 05 05:49:42.864 INFO [stderr]    |
Dec 05 05:49:42.865 INFO [stderr] 78 |         if let Some(mut val) = self.as_mut() {
Dec 05 05:49:42.865 INFO [stderr]    |                     ----^^^
Dec 05 05:49:42.865 INFO [stderr]    |                     |
Dec 05 05:49:42.865 INFO [stderr]    |                     help: remove this `mut`
Dec 05 05:49:42.865 INFO [stderr]    |
Dec 05 05:49:42.865 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 05:49:42.865 INFO [stderr] 
Dec 05 05:49:43.263 INFO [stderr] warning: unused `#[macro_use]` import
Dec 05 05:49:43.263 INFO [stderr]   --> src/lib.rs:14:18
Dec 05 05:49:43.263 INFO [stderr]    |
Dec 05 05:49:43.263 INFO [stderr] 14 | #[cfg_attr(test, macro_use)]
Dec 05 05:49:43.263 INFO [stderr]    |                  ^^^^^^^^^
Dec 05 05:49:43.263 INFO [stderr]    |
Dec 05 05:49:43.263 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 05 05:49:43.263 INFO [stderr] 
Dec 05 05:49:43.371 INFO [stderr] warning: variable does not need to be mutable
Dec 05 05:49:43.371 INFO [stderr]   --> src/lib.rs:78:21
Dec 05 05:49:43.371 INFO [stderr]    |
Dec 05 05:49:43.371 INFO [stderr] 78 |         if let Some(mut val) = self.as_mut() {
Dec 05 05:49:43.371 INFO [stderr]    |                     ----^^^
Dec 05 05:49:43.371 INFO [stderr]    |                     |
Dec 05 05:49:43.371 INFO [stderr]    |                     help: remove this `mut`
Dec 05 05:49:43.371 INFO [stderr]    |
Dec 05 05:49:43.371 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 05:49:43.371 INFO [stderr] 
Dec 05 05:49:43.381 INFO [stderr] warning: variable does not need to be mutable
Dec 05 05:49:43.381 INFO [stderr]    --> src/lib.rs:141:33
Dec 05 05:49:43.381 INFO [stderr]     |
Dec 05 05:49:43.381 INFO [stderr] 141 |         let mutated = base.tap(|mut arr| for elt in arr.iter_mut() {
Dec 05 05:49:43.381 INFO [stderr]     |                                 ----^^^
Dec 05 05:49:43.381 INFO [stderr]     |                                 |
Dec 05 05:49:43.381 INFO [stderr]     |                                 help: remove this `mut`
Dec 05 05:49:43.381 INFO [stderr] 
Dec 05 05:49:43.592 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.31s
Dec 05 05:49:43.595 INFO [stderr] su: No module specific data is present
Dec 05 05:49:44.056 INFO running `"docker" "inspect" "e6aad3e8555356fbc6a0cdbc7994802b422e3bbafed2ec145950f141ca67f611"`
Dec 05 05:49:44.305 INFO running `"docker" "rm" "-f" "e6aad3e8555356fbc6a0cdbc7994802b422e3bbafed2ec145950f141ca67f611"`
Dec 05 05:49:44.417 INFO [stdout] e6aad3e8555356fbc6a0cdbc7994802b422e3bbafed2ec145950f141ca67f611