Dec 12 07:43:20.136 INFO checking serial-0.4.0 against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 07:43:20.136 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-6/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/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 07:43:20.708 INFO [stdout] bc21d79cb30a92622ce213f49517ffe8d754cf141778d8c7f2cdfba453f00abf
Dec 12 07:43:20.714 INFO running `"docker" "start" "-a" "bc21d79cb30a92622ce213f49517ffe8d754cf141778d8c7f2cdfba453f00abf"`
Dec 12 07:43:21.238 INFO [stderr] usermod: no changes
Dec 12 07:43:21.280 INFO [stderr]     Checking ioctl-rs v0.1.6
Dec 12 07:43:21.280 INFO [stderr]     Checking serial-core v0.4.0
Dec 12 07:43:21.889 INFO [stderr]     Checking serial-unix v0.4.0
Dec 12 07:43:22.430 INFO [stderr]     Checking serial v0.4.0 (/source)
Dec 12 07:43:24.647 INFO [stderr] warning: unused import: `std::io::prelude`
Dec 12 07:43:24.647 INFO [stderr]  --> examples/read_write.rs:6:5
Dec 12 07:43:24.647 INFO [stderr]   |
Dec 12 07:43:24.647 INFO [stderr] 6 | use std::io::prelude::*;
Dec 12 07:43:24.647 INFO [stderr]   |     ^^^^^^^^^^^^^^^^
Dec 12 07:43:24.648 INFO [stderr]   |
Dec 12 07:43:24.648 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 12 07:43:24.648 INFO [stderr] 
Dec 12 07:43:24.700 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.45s
Dec 12 07:43:24.708 INFO [stderr] su: No module specific data is present
Dec 12 07:43:25.248 INFO running `"docker" "inspect" "bc21d79cb30a92622ce213f49517ffe8d754cf141778d8c7f2cdfba453f00abf"`
Dec 12 07:43:25.384 INFO running `"docker" "rm" "-f" "bc21d79cb30a92622ce213f49517ffe8d754cf141778d8c7f2cdfba453f00abf"`
Dec 12 07:43:25.522 INFO [stdout] bc21d79cb30a92622ce213f49517ffe8d754cf141778d8c7f2cdfba453f00abf