Dec 12 03:41:52.847 INFO checking BookOwl/trusty against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 03:41:52.847 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-5/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 03:41:53.363 INFO [stdout] 1e18c50f16e7794c22d9846ebb22d9b67b307dd01b6f2bc1be7901e91ffa9c7e
Dec 12 03:41:53.365 INFO running `"docker" "start" "-a" "1e18c50f16e7794c22d9846ebb22d9b67b307dd01b6f2bc1be7901e91ffa9c7e"`
Dec 12 03:41:54.431 INFO [stderr] usermod: no changes
Dec 12 03:41:54.524 INFO [stderr]     Checking left-pad v1.0.1
Dec 12 03:41:54.524 INFO [stderr]     Checking termion v1.1.4
Dec 12 03:41:55.560 INFO [stderr]     Checking trusty v0.1.0 (/source)
Dec 12 03:41:56.152 INFO [stderr] warning: variable does not need to be mutable
Dec 12 03:41:56.152 INFO [stderr]   --> src/backend.rs:62:17
Dec 12 03:41:56.152 INFO [stderr]    |
Dec 12 03:41:56.152 INFO [stderr] 62 |             let mut buf = self.current_buffer_mut();
Dec 12 03:41:56.152 INFO [stderr]    |                 ----^^^
Dec 12 03:41:56.152 INFO [stderr]    |                 |
Dec 12 03:41:56.152 INFO [stderr]    |                 help: remove this `mut`
Dec 12 03:41:56.152 INFO [stderr]    |
Dec 12 03:41:56.152 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 03:41:56.152 INFO [stderr] 
Dec 12 03:41:56.152 INFO [stderr] warning: variable does not need to be mutable
Dec 12 03:41:56.152 INFO [stderr]   --> src/backend.rs:66:13
Dec 12 03:41:56.152 INFO [stderr]    |
Dec 12 03:41:56.152 INFO [stderr] 66 |         let mut cursor = self.cursor_mut();
Dec 12 03:41:56.152 INFO [stderr]    |             ----^^^^^^
Dec 12 03:41:56.152 INFO [stderr]    |             |
Dec 12 03:41:56.152 INFO [stderr]    |             help: remove this `mut`
Dec 12 03:41:56.152 INFO [stderr] 
Dec 12 03:41:56.328 INFO [stderr] warning: variable does not need to be mutable
Dec 12 03:41:56.328 INFO [stderr]   --> src/backend.rs:62:17
Dec 12 03:41:56.328 INFO [stderr]    |
Dec 12 03:41:56.328 INFO [stderr] 62 |             let mut buf = self.current_buffer_mut();
Dec 12 03:41:56.328 INFO [stderr]    |                 ----^^^
Dec 12 03:41:56.328 INFO [stderr]    |                 |
Dec 12 03:41:56.328 INFO [stderr]    |                 help: remove this `mut`
Dec 12 03:41:56.328 INFO [stderr]    |
Dec 12 03:41:56.328 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 03:41:56.328 INFO [stderr] 
Dec 12 03:41:56.328 INFO [stderr] warning: variable does not need to be mutable
Dec 12 03:41:56.328 INFO [stderr]   --> src/backend.rs:66:13
Dec 12 03:41:56.328 INFO [stderr]    |
Dec 12 03:41:56.328 INFO [stderr] 66 |         let mut cursor = self.cursor_mut();
Dec 12 03:41:56.328 INFO [stderr]    |             ----^^^^^^
Dec 12 03:41:56.328 INFO [stderr]    |             |
Dec 12 03:41:56.328 INFO [stderr]    |             help: remove this `mut`
Dec 12 03:41:56.328 INFO [stderr] 
Dec 12 03:41:56.985 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.52s
Dec 12 03:41:56.988 INFO [stderr] su: No module specific data is present
Dec 12 03:41:57.483 INFO running `"docker" "inspect" "1e18c50f16e7794c22d9846ebb22d9b67b307dd01b6f2bc1be7901e91ffa9c7e"`
Dec 12 03:41:57.720 INFO running `"docker" "rm" "-f" "1e18c50f16e7794c22d9846ebb22d9b67b307dd01b6f2bc1be7901e91ffa9c7e"`
Dec 12 03:41:58.052 INFO [stdout] 1e18c50f16e7794c22d9846ebb22d9b67b307dd01b6f2bc1be7901e91ffa9c7e