[INFO] updating cached repository harrydevnull/cassandra-rust-test
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/harrydevnull/cassandra-rust-test
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/harrydevnull/cassandra-rust-test" "work/ex/beta-1.38-1/sources/1.37.0/gh/harrydevnull/cassandra-rust-test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/harrydevnull/cassandra-rust-test'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/harrydevnull/cassandra-rust-test" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/harrydevnull/cassandra-rust-test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/harrydevnull/cassandra-rust-test'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 393ec43dab8fd0c1635447a0b77abf26b7c6240d
[INFO] sha for GitHub repo harrydevnull/cassandra-rust-test: 393ec43dab8fd0c1635447a0b77abf26b7c6240d
[INFO] validating manifest of harrydevnull/cassandra-rust-test 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 harrydevnull/cassandra-rust-test 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 harrydevnull/cassandra-rust-test
[INFO] finished frobbing harrydevnull/cassandra-rust-test
[INFO] frobbed toml for harrydevnull/cassandra-rust-test written to work/ex/beta-1.38-1/sources/1.37.0/gh/harrydevnull/cassandra-rust-test/Cargo.toml
[INFO] started frobbing harrydevnull/cassandra-rust-test
[INFO] finished frobbing harrydevnull/cassandra-rust-test
[INFO] frobbed toml for harrydevnull/cassandra-rust-test written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/harrydevnull/cassandra-rust-test/Cargo.toml
[INFO] crate harrydevnull/cassandra-rust-test 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 harrydevnull/cassandra-rust-test 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/harrydevnull/cassandra-rust-test:/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] e169d8ebbac2a04551701d337c07a5f0ee51aea8463f6b37e71ca7a9877b3ff7
[INFO] running `"docker" "start" "-a" "e169d8ebbac2a04551701d337c07a5f0ee51aea8463f6b37e71ca7a9877b3ff7"`
[INFO] [stderr]    Compiling uuid v0.2.3
[INFO] [stderr]    Compiling snap v0.1.2
[INFO] [stderr]    Compiling cdrs v0.2.0
[INFO] [stderr]    Compiling cassandraaccess v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `response_frame`
[INFO] [stderr]   --> src/main.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let response_frame = client.start(compression::Compression::Snappy).unwrap();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_response_frame`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.56s
[INFO] running `"docker" "inspect" "e169d8ebbac2a04551701d337c07a5f0ee51aea8463f6b37e71ca7a9877b3ff7"`
[INFO] running `"docker" "rm" "-f" "e169d8ebbac2a04551701d337c07a5f0ee51aea8463f6b37e71ca7a9877b3ff7"`
[INFO] [stdout] e169d8ebbac2a04551701d337c07a5f0ee51aea8463f6b37e71ca7a9877b3ff7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/harrydevnull/cassandra-rust-test:/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] 7d5af17eb6d754e4e0853bd1b24e76908f3592578bd5b5ee401f0cda29273f26
[INFO] running `"docker" "start" "-a" "7d5af17eb6d754e4e0853bd1b24e76908f3592578bd5b5ee401f0cda29273f26"`
[INFO] [stderr]    Compiling cassandraaccess v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `response_frame`
[INFO] [stderr]   --> src/main.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let response_frame = client.start(compression::Compression::Snappy).unwrap();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_response_frame`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "7d5af17eb6d754e4e0853bd1b24e76908f3592578bd5b5ee401f0cda29273f26"`
[INFO] running `"docker" "rm" "-f" "7d5af17eb6d754e4e0853bd1b24e76908f3592578bd5b5ee401f0cda29273f26"`
[INFO] [stdout] 7d5af17eb6d754e4e0853bd1b24e76908f3592578bd5b5ee401f0cda29273f26
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/harrydevnull/cassandra-rust-test:/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] 066cdfe49c33cdb844b3cab7aabb6a3c9285b0361fabafd50799f99af623ea3f
[INFO] running `"docker" "start" "-a" "066cdfe49c33cdb844b3cab7aabb6a3c9285b0361fabafd50799f99af623ea3f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cassandraaccess-12605e7be18594a8
[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" "066cdfe49c33cdb844b3cab7aabb6a3c9285b0361fabafd50799f99af623ea3f"`
[INFO] running `"docker" "rm" "-f" "066cdfe49c33cdb844b3cab7aabb6a3c9285b0361fabafd50799f99af623ea3f"`
[INFO] [stdout] 066cdfe49c33cdb844b3cab7aabb6a3c9285b0361fabafd50799f99af623ea3f