Dec 05 04:09:09.222 INFO checking x-923-0.1.2 against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 05 04:09:09.222 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-2/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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 04:09:09.432 INFO [stdout] 3ff17ee4b48f27949817532271c2a8cbfe48a66617ba6458af526b89ade0be72
Dec 05 04:09:09.440 INFO running `"docker" "start" "-a" "3ff17ee4b48f27949817532271c2a8cbfe48a66617ba6458af526b89ade0be72"`
Dec 05 04:09:10.075 INFO [stderr] usermod: no changes
Dec 05 04:09:10.115 INFO [stderr]     Checking x-923 v0.1.2 (/source)
Dec 05 04:09:10.528 INFO [stderr] warning: variable does not need to be mutable
Dec 05 04:09:10.528 INFO [stderr]   --> src/lib.rs:20:19
Dec 05 04:09:10.529 INFO [stderr]    |
Dec 05 04:09:10.529 INFO [stderr] 20 | pub fn pad_buffer(mut buffer: &mut Vec<u8>, block_size: u8) {
Dec 05 04:09:10.529 INFO [stderr]    |                   ----^^^^^^
Dec 05 04:09:10.530 INFO [stderr]    |                   |
Dec 05 04:09:10.530 INFO [stderr]    |                   help: remove this `mut`
Dec 05 04:09:10.530 INFO [stderr]    |
Dec 05 04:09:10.531 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 04:09:10.531 INFO [stderr] 
Dec 05 04:09:10.531 INFO [stderr] warning: variable does not need to be mutable
Dec 05 04:09:10.531 INFO [stderr]   --> src/lib.rs:31:22
Dec 05 04:09:10.531 INFO [stderr]    |
Dec 05 04:09:10.531 INFO [stderr] 31 | pub fn un_pad_buffer(mut buffer: &mut Vec<u8>) {
Dec 05 04:09:10.531 INFO [stderr]    |                      ----^^^^^^
Dec 05 04:09:10.531 INFO [stderr]    |                      |
Dec 05 04:09:10.531 INFO [stderr]    |                      help: remove this `mut`
Dec 05 04:09:10.531 INFO [stderr] 
Dec 05 04:09:10.727 INFO [stderr] warning: variable does not need to be mutable
Dec 05 04:09:10.727 INFO [stderr]   --> src/lib.rs:20:19
Dec 05 04:09:10.727 INFO [stderr]    |
Dec 05 04:09:10.727 INFO [stderr] 20 | pub fn pad_buffer(mut buffer: &mut Vec<u8>, block_size: u8) {
Dec 05 04:09:10.727 INFO [stderr]    |                   ----^^^^^^
Dec 05 04:09:10.727 INFO [stderr]    |                   |
Dec 05 04:09:10.727 INFO [stderr]    |                   help: remove this `mut`
Dec 05 04:09:10.727 INFO [stderr]    |
Dec 05 04:09:10.727 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 04:09:10.727 INFO [stderr] 
Dec 05 04:09:10.731 INFO [stderr] warning: variable does not need to be mutable
Dec 05 04:09:10.731 INFO [stderr]   --> src/lib.rs:31:22
Dec 05 04:09:10.731 INFO [stderr]    |
Dec 05 04:09:10.731 INFO [stderr] 31 | pub fn un_pad_buffer(mut buffer: &mut Vec<u8>) {
Dec 05 04:09:10.731 INFO [stderr]    |                      ----^^^^^^
Dec 05 04:09:10.731 INFO [stderr]    |                      |
Dec 05 04:09:10.731 INFO [stderr]    |                      help: remove this `mut`
Dec 05 04:09:10.731 INFO [stderr] 
Dec 05 04:09:11.128 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
Dec 05 04:09:11.131 INFO [stderr] su: No module specific data is present
Dec 05 04:09:11.518 INFO running `"docker" "inspect" "3ff17ee4b48f27949817532271c2a8cbfe48a66617ba6458af526b89ade0be72"`
Dec 05 04:09:11.651 INFO running `"docker" "rm" "-f" "3ff17ee4b48f27949817532271c2a8cbfe48a66617ba6458af526b89ade0be72"`
Dec 05 04:09:11.746 INFO [stdout] 3ff17ee4b48f27949817532271c2a8cbfe48a66617ba6458af526b89ade0be72