[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-1.38-1/sources/1.37.0/gh/howeih/Day-9-Monte-carlo-PI"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/gh/howeih/Day-9-Monte-carlo-PI"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of howeih/Day-9-Monte-carlo-PI on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing howeih/Day-9-Monte-carlo-PI against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 7fd4b434cc7faa8e7f30b29d746b06f5ea364a9274fc9c4157a14ed6a4732b1d
[INFO] running `"docker" "start" "-a" "7fd4b434cc7faa8e7f30b29d746b06f5ea364a9274fc9c4157a14ed6a4732b1d"`
[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 1.00s
[INFO] running `"docker" "inspect" "7fd4b434cc7faa8e7f30b29d746b06f5ea364a9274fc9c4157a14ed6a4732b1d"`
[INFO] running `"docker" "rm" "-f" "7fd4b434cc7faa8e7f30b29d746b06f5ea364a9274fc9c4157a14ed6a4732b1d"`
[INFO] [stdout] 7fd4b434cc7faa8e7f30b29d746b06f5ea364a9274fc9c4157a14ed6a4732b1d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 13d0d69649abe98942d4060e7e19b637334fcc538a26de4da847cdb391db6393
[INFO] running `"docker" "start" "-a" "13d0d69649abe98942d4060e7e19b637334fcc538a26de4da847cdb391db6393"`
[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 0.80s
[INFO] running `"docker" "inspect" "13d0d69649abe98942d4060e7e19b637334fcc538a26de4da847cdb391db6393"`
[INFO] running `"docker" "rm" "-f" "13d0d69649abe98942d4060e7e19b637334fcc538a26de4da847cdb391db6393"`
[INFO] [stdout] 13d0d69649abe98942d4060e7e19b637334fcc538a26de4da847cdb391db6393
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] b8eecf963e640c16361a485e93cda49b7d7a0e0a9c580792cb7d216b32f8a351
[INFO] running `"docker" "start" "-a" "b8eecf963e640c16361a485e93cda49b7d7a0e0a9c580792cb7d216b32f8a351"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/monte_carlo-8752c87793856d12
[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" "b8eecf963e640c16361a485e93cda49b7d7a0e0a9c580792cb7d216b32f8a351"`
[INFO] running `"docker" "rm" "-f" "b8eecf963e640c16361a485e93cda49b7d7a0e0a9c580792cb7d216b32f8a351"`
[INFO] [stdout] b8eecf963e640c16361a485e93cda49b7d7a0e0a9c580792cb7d216b32f8a351