Dec 12 07:27:14.197 INFO checking skylane-0.1.2 against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 07:27:14.197 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-0/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/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 07:27:14.565 INFO [stdout] 1f4b31848c19b5ab9bea93438f99870424111f06e7dedd5cf95b524349f990d6
Dec 12 07:27:14.567 INFO running `"docker" "start" "-a" "1f4b31848c19b5ab9bea93438f99870424111f06e7dedd5cf95b524349f990d6"`
Dec 12 07:27:15.480 INFO [stderr] usermod: no changes
Dec 12 07:27:15.572 INFO [stderr]     Checking nix v0.8.1
Dec 12 07:27:19.496 INFO [stderr]     Checking skylane v0.1.2 (/source)
Dec 12 07:27:20.668 INFO [stderr] warning: variable does not need to be mutable
Dec 12 07:27:20.668 INFO [stderr]    --> src/connection.rs:201:22
Dec 12 07:27:20.668 INFO [stderr]     |
Dec 12 07:27:20.668 INFO [stderr] 201 |                      mut bytes_buf: &mut Cursor<&[u8]>,
Dec 12 07:27:20.668 INFO [stderr]     |                      ----^^^^^^^^^
Dec 12 07:27:20.668 INFO [stderr]     |                      |
Dec 12 07:27:20.668 INFO [stderr]     |                      help: remove this `mut`
Dec 12 07:27:20.668 INFO [stderr]     |
Dec 12 07:27:20.668 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 07:27:20.668 INFO [stderr] 
Dec 12 07:27:20.668 INFO [stderr] warning: variable does not need to be mutable
Dec 12 07:27:20.668 INFO [stderr]    --> src/connection.rs:202:22
Dec 12 07:27:20.668 INFO [stderr]     |
Dec 12 07:27:20.668 INFO [stderr] 202 |                      mut fds_buf: &mut Cursor<&[u8]>)
Dec 12 07:27:20.668 INFO [stderr]     |                      ----^^^^^^^
Dec 12 07:27:20.668 INFO [stderr]     |                      |
Dec 12 07:27:20.668 INFO [stderr]     |                      help: remove this `mut`
Dec 12 07:27:20.668 INFO [stderr] 
Dec 12 07:27:20.893 INFO [stderr] warning: variable does not need to be mutable
Dec 12 07:27:20.894 INFO [stderr]    --> src/connection.rs:201:22
Dec 12 07:27:20.894 INFO [stderr]     |
Dec 12 07:27:20.894 INFO [stderr] 201 |                      mut bytes_buf: &mut Cursor<&[u8]>,
Dec 12 07:27:20.894 INFO [stderr]     |                      ----^^^^^^^^^
Dec 12 07:27:20.894 INFO [stderr]     |                      |
Dec 12 07:27:20.895 INFO [stderr]     |                      help: remove this `mut`
Dec 12 07:27:20.895 INFO [stderr]     |
Dec 12 07:27:20.895 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 07:27:20.895 INFO [stderr] 
Dec 12 07:27:20.895 INFO [stderr] warning: variable does not need to be mutable
Dec 12 07:27:20.896 INFO [stderr]    --> src/connection.rs:202:22
Dec 12 07:27:20.896 INFO [stderr]     |
Dec 12 07:27:20.896 INFO [stderr] 202 |                      mut fds_buf: &mut Cursor<&[u8]>)
Dec 12 07:27:20.896 INFO [stderr]     |                      ----^^^^^^^
Dec 12 07:27:20.897 INFO [stderr]     |                      |
Dec 12 07:27:20.897 INFO [stderr]     |                      help: remove this `mut`
Dec 12 07:27:20.897 INFO [stderr] 
Dec 12 07:27:20.962 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.46s
Dec 12 07:27:20.966 INFO [stderr] su: No module specific data is present
Dec 12 07:27:22.258 INFO running `"docker" "inspect" "1f4b31848c19b5ab9bea93438f99870424111f06e7dedd5cf95b524349f990d6"`
Dec 12 07:27:22.583 INFO running `"docker" "rm" "-f" "1f4b31848c19b5ab9bea93438f99870424111f06e7dedd5cf95b524349f990d6"`
Dec 12 07:27:22.883 INFO [stdout] 1f4b31848c19b5ab9bea93438f99870424111f06e7dedd5cf95b524349f990d6