Dec 06 17:02:35.241 INFO testing x-923-0.1.2 against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 06 17:02:35.241 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt build --frozen" "-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 06 17:02:35.416 INFO [stdout] e5c3f858cc37b75035a454564778f13ca05df8088ed0e0edb621ec6e89940cee
Dec 06 17:02:35.418 INFO running `"docker" "start" "-a" "e5c3f858cc37b75035a454564778f13ca05df8088ed0e0edb621ec6e89940cee"`
Dec 06 17:02:35.952 INFO [stderr] usermod: no changes
Dec 06 17:02:35.979 INFO [stderr]    Compiling x-923 v0.1.2 (/source)
Dec 06 17:02:36.466 INFO [stderr] warning: variable does not need to be mutable
Dec 06 17:02:36.467 INFO [stderr]   --> src/lib.rs:20:19
Dec 06 17:02:36.467 INFO [stderr]    |
Dec 06 17:02:36.467 INFO [stderr] 20 | pub fn pad_buffer(mut buffer: &mut Vec<u8>, block_size: u8) {
Dec 06 17:02:36.467 INFO [stderr]    |                   ----^^^^^^
Dec 06 17:02:36.468 INFO [stderr]    |                   |
Dec 06 17:02:36.468 INFO [stderr]    |                   help: remove this `mut`
Dec 06 17:02:36.468 INFO [stderr]    |
Dec 06 17:02:36.469 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 17:02:36.469 INFO [stderr] 
Dec 06 17:02:36.469 INFO [stderr] warning: variable does not need to be mutable
Dec 06 17:02:36.469 INFO [stderr]   --> src/lib.rs:31:22
Dec 06 17:02:36.470 INFO [stderr]    |
Dec 06 17:02:36.470 INFO [stderr] 31 | pub fn un_pad_buffer(mut buffer: &mut Vec<u8>) {
Dec 06 17:02:36.470 INFO [stderr]    |                      ----^^^^^^
Dec 06 17:02:36.470 INFO [stderr]    |                      |
Dec 06 17:02:36.471 INFO [stderr]    |                      help: remove this `mut`
Dec 06 17:02:36.471 INFO [stderr] 
Dec 06 17:02:36.759 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.79s
Dec 06 17:02:36.761 INFO [stderr] su: No module specific data is present
Dec 06 17:02:37.181 INFO running `"docker" "inspect" "e5c3f858cc37b75035a454564778f13ca05df8088ed0e0edb621ec6e89940cee"`
Dec 06 17:02:37.281 INFO running `"docker" "rm" "-f" "e5c3f858cc37b75035a454564778f13ca05df8088ed0e0edb621ec6e89940cee"`
Dec 06 17:02:37.367 INFO [stdout] e5c3f858cc37b75035a454564778f13ca05df8088ed0e0edb621ec6e89940cee
Dec 06 17:02:37.369 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-2/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt test --frozen --no-run" "-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 06 17:02:37.526 INFO [stdout] 7b0abf4bc9e33158a6d46e92734a385e622a734a1111f8a31bbec372d222023e
Dec 06 17:02:37.528 INFO running `"docker" "start" "-a" "7b0abf4bc9e33158a6d46e92734a385e622a734a1111f8a31bbec372d222023e"`
Dec 06 17:02:37.901 INFO [stderr] usermod: no changes
Dec 06 17:02:37.931 INFO [stderr]    Compiling x-923 v0.1.2 (/source)
Dec 06 17:02:38.444 INFO [stderr] warning: variable does not need to be mutable
Dec 06 17:02:38.444 INFO [stderr]   --> src/lib.rs:20:19
Dec 06 17:02:38.444 INFO [stderr]    |
Dec 06 17:02:38.444 INFO [stderr] 20 | pub fn pad_buffer(mut buffer: &mut Vec<u8>, block_size: u8) {
Dec 06 17:02:38.444 INFO [stderr]    |                   ----^^^^^^
Dec 06 17:02:38.444 INFO [stderr]    |                   |
Dec 06 17:02:38.444 INFO [stderr]    |                   help: remove this `mut`
Dec 06 17:02:38.446 INFO [stderr]    |
Dec 06 17:02:38.446 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 06 17:02:38.446 INFO [stderr] 
Dec 06 17:02:38.460 INFO [stderr] warning: variable does not need to be mutable
Dec 06 17:02:38.460 INFO [stderr]   --> src/lib.rs:31:22
Dec 06 17:02:38.460 INFO [stderr]    |
Dec 06 17:02:38.460 INFO [stderr] 31 | pub fn un_pad_buffer(mut buffer: &mut Vec<u8>) {
Dec 06 17:02:38.460 INFO [stderr]    |                      ----^^^^^^
Dec 06 17:02:38.460 INFO [stderr]    |                      |
Dec 06 17:02:38.460 INFO [stderr]    |                      help: remove this `mut`
Dec 06 17:02:38.472 INFO [stderr] 
Dec 06 17:02:38.816 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
Dec 06 17:02:38.820 INFO [stderr] su: No module specific data is present
Dec 06 17:02:39.201 INFO running `"docker" "inspect" "7b0abf4bc9e33158a6d46e92734a385e622a734a1111f8a31bbec372d222023e"`
Dec 06 17:02:39.276 INFO running `"docker" "rm" "-f" "7b0abf4bc9e33158a6d46e92734a385e622a734a1111f8a31bbec372d222023e"`
Dec 06 17:02:39.372 INFO [stdout] 7b0abf4bc9e33158a6d46e92734a385e622a734a1111f8a31bbec372d222023e