[INFO] updating cached repository kellymclaughlin/rust-quickcheck-example
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kellymclaughlin/rust-quickcheck-example
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kellymclaughlin/rust-quickcheck-example" "work/ex/beta-1.38-1/sources/1.37.0/gh/kellymclaughlin/rust-quickcheck-example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/kellymclaughlin/rust-quickcheck-example'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kellymclaughlin/rust-quickcheck-example" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kellymclaughlin/rust-quickcheck-example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kellymclaughlin/rust-quickcheck-example'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 698332504a0d40080773f9128141b18fc163d61c
[INFO] sha for GitHub repo kellymclaughlin/rust-quickcheck-example: 698332504a0d40080773f9128141b18fc163d61c
[INFO] validating manifest of kellymclaughlin/rust-quickcheck-example 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 kellymclaughlin/rust-quickcheck-example 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 kellymclaughlin/rust-quickcheck-example
[INFO] finished frobbing kellymclaughlin/rust-quickcheck-example
[INFO] frobbed toml for kellymclaughlin/rust-quickcheck-example written to work/ex/beta-1.38-1/sources/1.37.0/gh/kellymclaughlin/rust-quickcheck-example/Cargo.toml
[INFO] started frobbing kellymclaughlin/rust-quickcheck-example
[INFO] finished frobbing kellymclaughlin/rust-quickcheck-example
[INFO] frobbed toml for kellymclaughlin/rust-quickcheck-example written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kellymclaughlin/rust-quickcheck-example/Cargo.toml
[INFO] crate kellymclaughlin/rust-quickcheck-example 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 kellymclaughlin/rust-quickcheck-example 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kellymclaughlin/rust-quickcheck-example:/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] 0146b78506ab099522b9f16553d129f24ee530adf654273916c63ae31719d6cc
[INFO] running `"docker" "start" "-a" "0146b78506ab099522b9f16553d129f24ee530adf654273916c63ae31719d6cc"`
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling env_logger v0.6.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling quickcheck v0.8.3
[INFO] [stderr]    Compiling quickcheck-example v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.63s
[INFO] running `"docker" "inspect" "0146b78506ab099522b9f16553d129f24ee530adf654273916c63ae31719d6cc"`
[INFO] running `"docker" "rm" "-f" "0146b78506ab099522b9f16553d129f24ee530adf654273916c63ae31719d6cc"`
[INFO] [stdout] 0146b78506ab099522b9f16553d129f24ee530adf654273916c63ae31719d6cc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kellymclaughlin/rust-quickcheck-example:/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] fbfe0ac78399e1b354b625147d7a17d42a9e9c888c74fbe0a9a40d069c814ee1
[INFO] running `"docker" "start" "-a" "fbfe0ac78399e1b354b625147d7a17d42a9e9c888c74fbe0a9a40d069c814ee1"`
[INFO] [stderr]    Compiling quickcheck-example v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `StdGen`, `quickcheck`
[INFO] [stderr]   --> src/main.rs:17:22
[INFO] [stderr]    |
[INFO] [stderr] 17 |     use quickcheck::{quickcheck, QuickCheck, StdGen, StdThreadGen};
[INFO] [stderr]    |                      ^^^^^^^^^^              ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.65s
[INFO] running `"docker" "inspect" "fbfe0ac78399e1b354b625147d7a17d42a9e9c888c74fbe0a9a40d069c814ee1"`
[INFO] running `"docker" "rm" "-f" "fbfe0ac78399e1b354b625147d7a17d42a9e9c888c74fbe0a9a40d069c814ee1"`
[INFO] [stdout] fbfe0ac78399e1b354b625147d7a17d42a9e9c888c74fbe0a9a40d069c814ee1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kellymclaughlin/rust-quickcheck-example:/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] 59a3134d5b6df39e1c049672ad09393d2cd6193ec487089edb9ac25b6bb9ab6f
[INFO] running `"docker" "start" "-a" "59a3134d5b6df39e1c049672ad09393d2cd6193ec487089edb9ac25b6bb9ab6f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/quickcheck_example-cfde12445a117ff5
[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/quickcheck_example-49dac7ef67ee75dc
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test::test_cases ... ok
[INFO] [stdout] test test::prop_test_add ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests quickcheck-example
[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" "59a3134d5b6df39e1c049672ad09393d2cd6193ec487089edb9ac25b6bb9ab6f"`
[INFO] running `"docker" "rm" "-f" "59a3134d5b6df39e1c049672ad09393d2cd6193ec487089edb9ac25b6bb9ab6f"`
[INFO] [stdout] 59a3134d5b6df39e1c049672ad09393d2cd6193ec487089edb9ac25b6bb9ab6f