Dec 19 19:15:18.941 INFO checking ccqpein/random_choice against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 19:15:18.941 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 19:15:19.300 INFO [stdout] f383cbe7534246b017a9e448b3a36cdb488bf9d810fa1e1d6191f0a355b0675b
Dec 19 19:15:19.306 INFO running `"docker" "start" "-a" "f383cbe7534246b017a9e448b3a36cdb488bf9d810fa1e1d6191f0a355b0675b"`
Dec 19 19:15:20.780 INFO [stderr]    Compiling serde v1.0.56
Dec 19 19:15:20.784 INFO [stderr]    Compiling serde_derive v1.0.56
Dec 19 19:15:36.276 INFO [stderr]     Checking serde_json v1.0.17
Dec 19 19:15:38.368 INFO [stderr]     Checking random_choice v0.1.0 (/opt/crater/workdir)
Dec 19 19:15:38.968 INFO [stderr] warning: unused import: `std::collections::HashMap`
Dec 19 19:15:38.968 INFO [stderr]   --> src/lib.rs:10:5
Dec 19 19:15:38.968 INFO [stderr]    |
Dec 19 19:15:38.968 INFO [stderr] 10 | use std::collections::HashMap;
Dec 19 19:15:38.968 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:15:38.968 INFO [stderr]    |
Dec 19 19:15:38.968 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 19 19:15:38.968 INFO [stderr] 
Dec 19 19:15:39.064 INFO [stderr] warning: unused import: `std::collections::HashMap`
Dec 19 19:15:39.064 INFO [stderr]   --> src/lib.rs:10:5
Dec 19 19:15:39.064 INFO [stderr]    |
Dec 19 19:15:39.064 INFO [stderr] 10 | use std::collections::HashMap;
Dec 19 19:15:39.064 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:15:39.064 INFO [stderr]    |
Dec 19 19:15:39.064 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 19 19:15:39.064 INFO [stderr] 
Dec 19 19:15:40.908 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.25s
Dec 19 19:15:41.817 INFO running `"docker" "inspect" "f383cbe7534246b017a9e448b3a36cdb488bf9d810fa1e1d6191f0a355b0675b"`
Dec 19 19:15:42.136 INFO running `"docker" "rm" "-f" "f383cbe7534246b017a9e448b3a36cdb488bf9d810fa1e1d6191f0a355b0675b"`
Dec 19 19:15:42.376 INFO [stdout] f383cbe7534246b017a9e448b3a36cdb488bf9d810fa1e1d6191f0a355b0675b