[INFO] updating cached repository ccqpein/random_choice
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ccqpein/random_choice
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ccqpein/random_choice" "work/ex/beta-1.37-6/sources/1.36.0/gh/ccqpein/random_choice"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/ccqpein/random_choice'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ccqpein/random_choice" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ccqpein/random_choice"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ccqpein/random_choice'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8b223064ca792feed5217b86dc4d3281a05ba75c
[INFO] sha for GitHub repo ccqpein/random_choice: 8b223064ca792feed5217b86dc4d3281a05ba75c
[INFO] validating manifest of ccqpein/random_choice on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ccqpein/random_choice on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ccqpein/random_choice
[INFO] finished frobbing ccqpein/random_choice
[INFO] frobbed toml for ccqpein/random_choice written to work/ex/beta-1.37-6/sources/1.36.0/gh/ccqpein/random_choice/Cargo.toml
[INFO] started frobbing ccqpein/random_choice
[INFO] finished frobbing ccqpein/random_choice
[INFO] frobbed toml for ccqpein/random_choice written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ccqpein/random_choice/Cargo.toml
[INFO] crate ccqpein/random_choice already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ccqpein/random_choice against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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=warn" "-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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 972ac82ce559fc658f9e67ed9d264a348c5c3d4142556cb0b063ac335eac1ee2
[INFO] running `"docker" "start" "-a" "972ac82ce559fc658f9e67ed9d264a348c5c3d4142556cb0b063ac335eac1ee2"`
[INFO] [stderr]    Compiling serde v1.0.56
[INFO] [stderr]    Compiling serde_derive v1.0.56
[INFO] [stderr]    Compiling serde_json v1.0.17
[INFO] [stderr]    Compiling random_choice v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]   --> src/lib.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::collections::HashMap;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.23s
[INFO] running `"docker" "inspect" "972ac82ce559fc658f9e67ed9d264a348c5c3d4142556cb0b063ac335eac1ee2"`
[INFO] running `"docker" "rm" "-f" "972ac82ce559fc658f9e67ed9d264a348c5c3d4142556cb0b063ac335eac1ee2"`
[INFO] [stdout] 972ac82ce559fc658f9e67ed9d264a348c5c3d4142556cb0b063ac335eac1ee2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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=warn" "-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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 31b35841d5d3a05805299f47f175d990c431f08fd92f381679a948f8f36d1ac7
[INFO] running `"docker" "start" "-a" "31b35841d5d3a05805299f47f175d990c431f08fd92f381679a948f8f36d1ac7"`
[INFO] [stderr]    Compiling random_choice v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]   --> src/lib.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::collections::HashMap;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.64s
[INFO] running `"docker" "inspect" "31b35841d5d3a05805299f47f175d990c431f08fd92f381679a948f8f36d1ac7"`
[INFO] running `"docker" "rm" "-f" "31b35841d5d3a05805299f47f175d990c431f08fd92f381679a948f8f36d1ac7"`
[INFO] [stdout] 31b35841d5d3a05805299f47f175d990c431f08fd92f381679a948f8f36d1ac7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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=warn" "-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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 166104ccf62d20ac3171d77bafdbb38eb4c3001fae76253aba3cf74e9b151a1c
[INFO] running `"docker" "start" "-a" "166104ccf62d20ac3171d77bafdbb38eb4c3001fae76253aba3cf74e9b151a1c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/random_choice-c6c11a374f24da46
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/random_choice-6a0fe0c32d789184
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests random_choice
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "166104ccf62d20ac3171d77bafdbb38eb4c3001fae76253aba3cf74e9b151a1c"`
[INFO] running `"docker" "rm" "-f" "166104ccf62d20ac3171d77bafdbb38eb4c3001fae76253aba3cf74e9b151a1c"`
[INFO] [stdout] 166104ccf62d20ac3171d77bafdbb38eb4c3001fae76253aba3cf74e9b151a1c