Dec 18 02:39:58.299 INFO checking ccqpein/random_choice against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 02:39:58.299 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/ccqpein/random_choice:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 02:39:58.796 INFO [stdout] 48e49dc1188aa2e95026193c8fb71cbf0bb5218ae22f9df3f49d39ed6a62670e
Dec 18 02:39:58.798 INFO running `"docker" "start" "-a" "48e49dc1188aa2e95026193c8fb71cbf0bb5218ae22f9df3f49d39ed6a62670e"`
Dec 18 02:40:00.447 INFO [stderr]    Compiling serde v1.0.56
Dec 18 02:40:00.463 INFO [stderr]    Compiling serde_derive v1.0.56
Dec 18 02:40:14.279 INFO [stderr]     Checking serde_json v1.0.17
Dec 18 02:40:16.662 INFO [stderr]     Checking random_choice v0.1.0 (/opt/crater/workdir)
Dec 18 02:40:17.320 INFO [stderr] warning: unused import: `std::collections::HashMap`
Dec 18 02:40:17.321 INFO [stderr]   --> src/lib.rs:10:5
Dec 18 02:40:17.321 INFO [stderr]    |
Dec 18 02:40:17.321 INFO [stderr] 10 | use std::collections::HashMap;
Dec 18 02:40:17.321 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:40:17.321 INFO [stderr]    |
Dec 18 02:40:17.321 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 18 02:40:17.321 INFO [stderr] 
Dec 18 02:40:17.372 INFO [stderr] warning: unused import: `std::collections::HashMap`
Dec 18 02:40:17.373 INFO [stderr]   --> src/lib.rs:10:5
Dec 18 02:40:17.373 INFO [stderr]    |
Dec 18 02:40:17.373 INFO [stderr] 10 | use std::collections::HashMap;
Dec 18 02:40:17.373 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:40:17.373 INFO [stderr]    |
Dec 18 02:40:17.373 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 18 02:40:17.380 INFO [stderr] 
Dec 18 02:40:20.088 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.73s
Dec 18 02:40:21.299 INFO running `"docker" "inspect" "48e49dc1188aa2e95026193c8fb71cbf0bb5218ae22f9df3f49d39ed6a62670e"`
Dec 18 02:40:21.562 INFO running `"docker" "rm" "-f" "48e49dc1188aa2e95026193c8fb71cbf0bb5218ae22f9df3f49d39ed6a62670e"`
Dec 18 02:40:21.944 INFO [stdout] 48e49dc1188aa2e95026193c8fb71cbf0bb5218ae22f9df3f49d39ed6a62670e