Dec 18 14:47:04.877 INFO checking joinkit-0.2.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 14:47:04.877 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/joinkit/0.2.0:/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 14:47:05.289 INFO [stdout] 50a36093db5fb61a2b77455145ce779e1f340cefd87d25ec0f21a1cf305cda72
Dec 18 14:47:05.294 INFO running `"docker" "start" "-a" "50a36093db5fb61a2b77455145ce779e1f340cefd87d25ec0f21a1cf305cda72"`
Dec 18 14:47:07.200 INFO [stderr]     Checking joinkit v0.2.0 (/opt/crater/workdir)
Dec 18 14:47:07.764 INFO [stderr] warning: unused `#[macro_use]` import
Dec 18 14:47:07.764 INFO [stderr]   --> src/lib.rs:27:1
Dec 18 14:47:07.764 INFO [stderr]    |
Dec 18 14:47:07.764 INFO [stderr] 27 | #[macro_use]
Dec 18 14:47:07.764 INFO [stderr]    | ^^^^^^^^^^^^
Dec 18 14:47:07.764 INFO [stderr]    |
Dec 18 14:47:07.764 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 18 14:47:07.764 INFO [stderr] 
Dec 18 14:47:07.860 INFO [stderr] warning: unused `#[macro_use]` import
Dec 18 14:47:07.860 INFO [stderr]   --> src/lib.rs:27:1
Dec 18 14:47:07.860 INFO [stderr]    |
Dec 18 14:47:07.860 INFO [stderr] 27 | #[macro_use]
Dec 18 14:47:07.860 INFO [stderr]    | ^^^^^^^^^^^^
Dec 18 14:47:07.860 INFO [stderr]    |
Dec 18 14:47:07.860 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 18 14:47:07.860 INFO [stderr] 
Dec 18 14:47:08.064 INFO [stderr] warning: unused import: `itertools::Itertools`
Dec 18 14:47:08.064 INFO [stderr]  --> src/util.rs:3:5
Dec 18 14:47:08.064 INFO [stderr]   |
Dec 18 14:47:08.064 INFO [stderr] 3 | use itertools::Itertools;
Dec 18 14:47:08.064 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
Dec 18 14:47:08.064 INFO [stderr] 
Dec 18 14:47:08.064 INFO [stderr] warning: unused import: `BufRead`
Dec 18 14:47:08.064 INFO [stderr]  --> src/util.rs:5:15
Dec 18 14:47:08.064 INFO [stderr]   |
Dec 18 14:47:08.064 INFO [stderr] 5 | use std::io::{BufRead, Write, BufWriter,};
Dec 18 14:47:08.064 INFO [stderr]   |               ^^^^^^^
Dec 18 14:47:08.064 INFO [stderr] 
Dec 18 14:47:08.212 INFO [stderr] warning: unused import: `itertools::Itertools`
Dec 18 14:47:08.212 INFO [stderr]  --> src/util.rs:3:5
Dec 18 14:47:08.212 INFO [stderr]   |
Dec 18 14:47:08.212 INFO [stderr] 3 | use itertools::Itertools;
Dec 18 14:47:08.212 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
Dec 18 14:47:08.212 INFO [stderr] 
Dec 18 14:47:08.212 INFO [stderr] warning: unused import: `BufRead`
Dec 18 14:47:08.212 INFO [stderr]  --> src/util.rs:5:15
Dec 18 14:47:08.212 INFO [stderr]   |
Dec 18 14:47:08.212 INFO [stderr] 5 | use std::io::{BufRead, Write, BufWriter,};
Dec 18 14:47:08.212 INFO [stderr]   |               ^^^^^^^
Dec 18 14:47:08.212 INFO [stderr] 
Dec 18 14:47:11.884 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.75s
Dec 18 14:47:12.424 INFO running `"docker" "inspect" "50a36093db5fb61a2b77455145ce779e1f340cefd87d25ec0f21a1cf305cda72"`
Dec 18 14:47:12.621 INFO running `"docker" "rm" "-f" "50a36093db5fb61a2b77455145ce779e1f340cefd87d25ec0f21a1cf305cda72"`
Dec 18 14:47:12.853 INFO [stdout] 50a36093db5fb61a2b77455145ce779e1f340cefd87d25ec0f21a1cf305cda72