[INFO] crate zz 0.1.0 is already in cache
[INFO] extracting crate zz 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/zz/0.1.0
[INFO] extracting crate zz 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/zz/0.1.0
[INFO] validating manifest of zz-0.1.0 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 zz-0.1.0 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 zz-0.1.0
[INFO] finished frobbing zz-0.1.0
[INFO] frobbed toml for zz-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/zz/0.1.0/Cargo.toml
[INFO] started frobbing zz-0.1.0
[INFO] finished frobbing zz-0.1.0
[INFO] frobbed toml for zz-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/zz/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing zz-0.1.0 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/zz/0.1.0:/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] 0c0d9e25396c85138364f10ccdf7bbeb5e67bfe9363abb5ae667ff1a9cbd89c7
[INFO] running `"docker" "start" "-a" "0c0d9e25396c85138364f10ccdf7bbeb5e67bfe9363abb5ae667ff1a9cbd89c7"`
[INFO] [stderr]    Compiling fasthash-sys v0.3.2
[INFO] [stderr]    Compiling xoroshiro128 v0.3.0
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling toml v0.5.3
[INFO] [stderr]    Compiling fasthash v0.4.0
[INFO] [stderr]    Compiling zz v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `artifact_namespace`
[INFO] [stderr]   --> src/resolver.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     artifact_namespace:         &Vec<String>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_artifact_namespace`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.18s
[INFO] running `"docker" "inspect" "0c0d9e25396c85138364f10ccdf7bbeb5e67bfe9363abb5ae667ff1a9cbd89c7"`
[INFO] running `"docker" "rm" "-f" "0c0d9e25396c85138364f10ccdf7bbeb5e67bfe9363abb5ae667ff1a9cbd89c7"`
[INFO] [stdout] 0c0d9e25396c85138364f10ccdf7bbeb5e67bfe9363abb5ae667ff1a9cbd89c7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/zz/0.1.0:/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] b0a4f6c95a4b4b5c7a5eea7113e9b43eede5d5dbde780e1a6797376d5798d441
[INFO] running `"docker" "start" "-a" "b0a4f6c95a4b4b5c7a5eea7113e9b43eede5d5dbde780e1a6797376d5798d441"`
[INFO] [stderr]    Compiling zz v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `artifact_namespace`
[INFO] [stderr]   --> src/resolver.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     artifact_namespace:         &Vec<String>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_artifact_namespace`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.57s
[INFO] running `"docker" "inspect" "b0a4f6c95a4b4b5c7a5eea7113e9b43eede5d5dbde780e1a6797376d5798d441"`
[INFO] running `"docker" "rm" "-f" "b0a4f6c95a4b4b5c7a5eea7113e9b43eede5d5dbde780e1a6797376d5798d441"`
[INFO] [stdout] b0a4f6c95a4b4b5c7a5eea7113e9b43eede5d5dbde780e1a6797376d5798d441
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/zz/0.1.0:/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] ca7f2ffd9913214733c30a4fc50d5c3821d4121b808297bd517938801660b936
[INFO] running `"docker" "start" "-a" "ca7f2ffd9913214733c30a4fc50d5c3821d4121b808297bd517938801660b936"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/zz-b9b8ef2e96a06476
[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" "ca7f2ffd9913214733c30a4fc50d5c3821d4121b808297bd517938801660b936"`
[INFO] running `"docker" "rm" "-f" "ca7f2ffd9913214733c30a4fc50d5c3821d4121b808297bd517938801660b936"`
[INFO] [stdout] ca7f2ffd9913214733c30a4fc50d5c3821d4121b808297bd517938801660b936