[INFO] updating cached repository benschulz/acid
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/benschulz/acid
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/benschulz/acid" "work/ex/beta-1.38-1/sources/1.37.0/gh/benschulz/acid"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/benschulz/acid'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/benschulz/acid" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/benschulz/acid"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/benschulz/acid'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ec1bd69980497694fbeb4bfef0d0506078924a0e
[INFO] sha for GitHub repo benschulz/acid: ec1bd69980497694fbeb4bfef0d0506078924a0e
[INFO] validating manifest of benschulz/acid 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 benschulz/acid 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 benschulz/acid
[INFO] finished frobbing benschulz/acid
[INFO] frobbed toml for benschulz/acid written to work/ex/beta-1.38-1/sources/1.37.0/gh/benschulz/acid/Cargo.toml
[INFO] started frobbing benschulz/acid
[INFO] finished frobbing benschulz/acid
[INFO] frobbed toml for benschulz/acid written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/benschulz/acid/Cargo.toml
[INFO] crate benschulz/acid 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 benschulz/acid against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/benschulz/acid:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 2d869f0badeeb2bfd6095e7794b9cea22b7e920c18267c7c981257c0050b52c1
[INFO] running `"docker" "start" "-a" "2d869f0badeeb2bfd6095e7794b9cea22b7e920c18267c7c981257c0050b52c1"`
[INFO] [stderr]    Compiling acid v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `"docker" "inspect" "2d869f0badeeb2bfd6095e7794b9cea22b7e920c18267c7c981257c0050b52c1"`
[INFO] running `"docker" "rm" "-f" "2d869f0badeeb2bfd6095e7794b9cea22b7e920c18267c7c981257c0050b52c1"`
[INFO] [stdout] 2d869f0badeeb2bfd6095e7794b9cea22b7e920c18267c7c981257c0050b52c1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/benschulz/acid:/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] e180653db00d3abaa257ab178bc399c55a1f826781cfe54d775326e44ab1be79
[INFO] running `"docker" "start" "-a" "e180653db00d3abaa257ab178bc399c55a1f826781cfe54d775326e44ab1be79"`
[INFO] [stderr]    Compiling acid v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
[INFO] [stderr]   --> src/lib.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     acid.clone();
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: cloning is often expensive and is not expected to have side effects
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
[INFO] [stderr]   --> src/lib.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     acid.clone();
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: cloning is often expensive and is not expected to have side effects
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.28s
[INFO] running `"docker" "inspect" "e180653db00d3abaa257ab178bc399c55a1f826781cfe54d775326e44ab1be79"`
[INFO] running `"docker" "rm" "-f" "e180653db00d3abaa257ab178bc399c55a1f826781cfe54d775326e44ab1be79"`
[INFO] [stdout] e180653db00d3abaa257ab178bc399c55a1f826781cfe54d775326e44ab1be79
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/benschulz/acid:/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 722726e8b7c4c489633c3a014dda76690916147583a1b02b150044b277a93482
[INFO] running `"docker" "start" "-a" "722726e8b7c4c489633c3a014dda76690916147583a1b02b150044b277a93482"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/acid-33941ce4ee607d56
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test it_should_panic_when_running_out_of_ids ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/test-01fa529eaded2be5
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test ids_for_two_clones_should_differ ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests acid
[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" "722726e8b7c4c489633c3a014dda76690916147583a1b02b150044b277a93482"`
[INFO] running `"docker" "rm" "-f" "722726e8b7c4c489633c3a014dda76690916147583a1b02b150044b277a93482"`
[INFO] [stdout] 722726e8b7c4c489633c3a014dda76690916147583a1b02b150044b277a93482