Dec 18 13:58:19.460 INFO checking mio-utun-0.6.19 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 13:58:19.460 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/mio-utun/0.6.19:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 13:58:19.782 INFO [stdout] 872c8b4d3dc0bf423a7e0bdd6f6e18b035ffa02948b0a5649af7d1bc5c1e1df8
Dec 18 13:58:19.788 INFO running `"docker" "start" "-a" "872c8b4d3dc0bf423a7e0bdd6f6e18b035ffa02948b0a5649af7d1bc5c1e1df8"`
Dec 18 13:58:20.689 INFO [stderr]     Checking mio-utun v0.6.19 (/opt/crater/workdir)
Dec 18 13:58:21.940 INFO [stderr] warning: unused import: `Write`
Dec 18 13:58:21.940 INFO [stderr]  --> tests/echo.rs:4:21
Dec 18 13:58:21.940 INFO [stderr]   |
Dec 18 13:58:21.940 INFO [stderr] 4 | use std::io::{self, Write, Read};
Dec 18 13:58:21.940 INFO [stderr]   |                     ^^^^^
Dec 18 13:58:21.940 INFO [stderr]   |
Dec 18 13:58:21.940 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 13:58:21.940 INFO [stderr] 
Dec 18 13:58:21.940 INFO [stderr] warning: unused import: `std::io::ErrorKind::WouldBlock`
Dec 18 13:58:21.940 INFO [stderr]  --> tests/echo.rs:5:5
Dec 18 13:58:21.940 INFO [stderr]   |
Dec 18 13:58:21.940 INFO [stderr] 5 | use std::io::ErrorKind::WouldBlock;
Dec 18 13:58:21.940 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 13:58:21.940 INFO [stderr] 
Dec 18 13:58:21.940 INFO [stderr] warning: unused macro definition
Dec 18 13:58:21.940 INFO [stderr]   --> tests/echo.rs:10:1
Dec 18 13:58:21.940 INFO [stderr]    |
Dec 18 13:58:21.940 INFO [stderr] 10 | / macro_rules! t {
Dec 18 13:58:21.940 INFO [stderr] 11 | |     ($e:expr) => (match $e {
Dec 18 13:58:21.940 INFO [stderr] 12 | |         Ok(e) => e,
Dec 18 13:58:21.940 INFO [stderr] 13 | |         Err(e) => panic!("{} failed with {}", stringify!($e), e),
Dec 18 13:58:21.940 INFO [stderr] 14 | |     })
Dec 18 13:58:21.940 INFO [stderr] 15 | | }
Dec 18 13:58:21.940 INFO [stderr]    | |_^
Dec 18 13:58:21.940 INFO [stderr]    |
Dec 18 13:58:21.940 INFO [stderr]    = note: #[warn(unused_macros)] on by default
Dec 18 13:58:21.940 INFO [stderr] 
Dec 18 13:58:21.992 INFO [stderr] warning: constant item is never used: `SERVER`
Dec 18 13:58:21.992 INFO [stderr]   --> tests/echo.rs:19:5
Dec 18 13:58:21.992 INFO [stderr]    |
Dec 18 13:58:21.992 INFO [stderr] 19 |     const SERVER: Token = Token(0);
Dec 18 13:58:21.992 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 13:58:21.992 INFO [stderr]    |
Dec 18 13:58:21.992 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 13:58:21.992 INFO [stderr] 
Dec 18 13:58:22.040 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.39s
Dec 18 13:58:22.481 INFO running `"docker" "inspect" "872c8b4d3dc0bf423a7e0bdd6f6e18b035ffa02948b0a5649af7d1bc5c1e1df8"`
Dec 18 13:58:22.827 INFO running `"docker" "rm" "-f" "872c8b4d3dc0bf423a7e0bdd6f6e18b035ffa02948b0a5649af7d1bc5c1e1df8"`
Dec 18 13:58:23.216 INFO [stdout] 872c8b4d3dc0bf423a7e0bdd6f6e18b035ffa02948b0a5649af7d1bc5c1e1df8