Dec 18 14:45:29.696 INFO checking json_flex-0.3.2 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 14:45:29.696 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/json_flex/0.3.2:/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 14:45:29.887 INFO [stdout] 7394b963dafb003b1411158449fece5ccdc555da0104a5d7274b00a20a371c1d
Dec 18 14:45:29.890 INFO running `"docker" "start" "-a" "7394b963dafb003b1411158449fece5ccdc555da0104a5d7274b00a20a371c1d"`
Dec 18 14:45:30.342 INFO [stderr]     Checking json_flex v0.3.2 (/opt/crater/workdir)
Dec 18 14:45:30.731 INFO [stderr] warning: unused import: `std::fs::File`
Dec 18 14:45:30.731 INFO [stderr]  --> src/test.rs:4:5
Dec 18 14:45:30.731 INFO [stderr]   |
Dec 18 14:45:30.731 INFO [stderr] 4 | use std::fs::File;
Dec 18 14:45:30.731 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 18 14:45:30.731 INFO [stderr]   |
Dec 18 14:45:30.731 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 14:45:30.731 INFO [stderr] 
Dec 18 14:45:30.731 INFO [stderr] warning: unused import: `std::io::prelude::*`
Dec 18 14:45:30.731 INFO [stderr]  --> src/test.rs:5:5
Dec 18 14:45:30.731 INFO [stderr]   |
Dec 18 14:45:30.731 INFO [stderr] 5 | use std::io::prelude::*;
Dec 18 14:45:30.731 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 18 14:45:30.731 INFO [stderr] 
Dec 18 14:45:31.757 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.43s
Dec 18 14:45:32.876 INFO running `"docker" "inspect" "7394b963dafb003b1411158449fece5ccdc555da0104a5d7274b00a20a371c1d"`
Dec 18 14:45:33.154 INFO running `"docker" "rm" "-f" "7394b963dafb003b1411158449fece5ccdc555da0104a5d7274b00a20a371c1d"`
Dec 18 14:45:33.380 INFO [stdout] 7394b963dafb003b1411158449fece5ccdc555da0104a5d7274b00a20a371c1d