[INFO] updating cached repository howeih/Day-9-Monte-carlo-PI
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/howeih/Day-9-Monte-carlo-PI
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/howeih/Day-9-Monte-carlo-PI" "work/ex/beta-1.37-6/sources/1.36.0/gh/howeih/Day-9-Monte-carlo-PI"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/howeih/Day-9-Monte-carlo-PI'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/howeih/Day-9-Monte-carlo-PI" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/howeih/Day-9-Monte-carlo-PI"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/howeih/Day-9-Monte-carlo-PI'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a7937015291ea5913375582edd0d9669ad423623
[INFO] sha for GitHub repo howeih/Day-9-Monte-carlo-PI: a7937015291ea5913375582edd0d9669ad423623
[INFO] validating manifest of howeih/Day-9-Monte-carlo-PI 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 howeih/Day-9-Monte-carlo-PI 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 howeih/Day-9-Monte-carlo-PI
[INFO] finished frobbing howeih/Day-9-Monte-carlo-PI
[INFO] frobbed toml for howeih/Day-9-Monte-carlo-PI written to work/ex/beta-1.37-6/sources/1.36.0/gh/howeih/Day-9-Monte-carlo-PI/Cargo.toml
[INFO] started frobbing howeih/Day-9-Monte-carlo-PI
[INFO] finished frobbing howeih/Day-9-Monte-carlo-PI
[INFO] frobbed toml for howeih/Day-9-Monte-carlo-PI written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/howeih/Day-9-Monte-carlo-PI/Cargo.toml
[INFO] crate howeih/Day-9-Monte-carlo-PI 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 howeih/Day-9-Monte-carlo-PI against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/howeih/Day-9-Monte-carlo-PI:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] a6ad2a98799f6956ea25d8182347968cbbd6c2707eed46e5618d60c03223062d
[INFO] running `"docker" "start" "-a" "a6ad2a98799f6956ea25d8182347968cbbd6c2707eed46e5618d60c03223062d"`
[INFO] [stderr]    Compiling monte_carlo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `thread_rng`
[INFO] [stderr]  --> src/main.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | use rand::{thread_rng, Rng};
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "a6ad2a98799f6956ea25d8182347968cbbd6c2707eed46e5618d60c03223062d"`
[INFO] running `"docker" "rm" "-f" "a6ad2a98799f6956ea25d8182347968cbbd6c2707eed46e5618d60c03223062d"`
[INFO] [stdout] a6ad2a98799f6956ea25d8182347968cbbd6c2707eed46e5618d60c03223062d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/howeih/Day-9-Monte-carlo-PI:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] ade887b6c6321ba6f50950fb59f9292ab6781d152fb4a889987c05d1ba2858ee
[INFO] running `"docker" "start" "-a" "ade887b6c6321ba6f50950fb59f9292ab6781d152fb4a889987c05d1ba2858ee"`
[INFO] [stderr]    Compiling monte_carlo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `thread_rng`
[INFO] [stderr]  --> src/main.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | use rand::{thread_rng, Rng};
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::num;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `"docker" "inspect" "ade887b6c6321ba6f50950fb59f9292ab6781d152fb4a889987c05d1ba2858ee"`
[INFO] running `"docker" "rm" "-f" "ade887b6c6321ba6f50950fb59f9292ab6781d152fb4a889987c05d1ba2858ee"`
[INFO] [stdout] ade887b6c6321ba6f50950fb59f9292ab6781d152fb4a889987c05d1ba2858ee
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/howeih/Day-9-Monte-carlo-PI:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] bad91ed8bc1488b025c2c8f6264dbe745b4310a84e5885a76cae6f36cf0c6294
[INFO] running `"docker" "start" "-a" "bad91ed8bc1488b025c2c8f6264dbe745b4310a84e5885a76cae6f36cf0c6294"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/monte_carlo-c5d0082eb16de9f2
[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" "bad91ed8bc1488b025c2c8f6264dbe745b4310a84e5885a76cae6f36cf0c6294"`
[INFO] running `"docker" "rm" "-f" "bad91ed8bc1488b025c2c8f6264dbe745b4310a84e5885a76cae6f36cf0c6294"`
[INFO] [stdout] bad91ed8bc1488b025c2c8f6264dbe745b4310a84e5885a76cae6f36cf0c6294