[INFO] updating cached repository jroesch/mu
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jroesch/mu
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jroesch/mu" "work/ex/beta-1.37-6/sources/1.36.0/gh/jroesch/mu"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/jroesch/mu'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jroesch/mu" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jroesch/mu"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jroesch/mu'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 669e69f9c98ccf8426575404e00ad8290c97d0b1
[INFO] sha for GitHub repo jroesch/mu: 669e69f9c98ccf8426575404e00ad8290c97d0b1
[INFO] validating manifest of jroesch/mu on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jroesch/mu on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jroesch/mu
[INFO] finished frobbing jroesch/mu
[INFO] frobbed toml for jroesch/mu written to work/ex/beta-1.37-6/sources/1.36.0/gh/jroesch/mu/Cargo.toml
[INFO] started frobbing jroesch/mu
[INFO] finished frobbing jroesch/mu
[INFO] frobbed toml for jroesch/mu written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jroesch/mu/Cargo.toml
[INFO] crate jroesch/mu already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing jroesch/mu against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jroesch/mu:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 11e5098638e362255d9721c2fb68332e711408e0a78a22cfbbc2e6c3c6357e26
[INFO] running `"docker" "start" "-a" "11e5098638e362255d9721c2fb68332e711408e0a78a22cfbbc2e6c3c6357e26"`
[INFO] [stderr]    Compiling topological-sort v0.0.7
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling env_logger v0.3.5
[INFO] [stderr]    Compiling docopt v0.6.86
[INFO] [stderr]    Compiling mu v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/mu/lib.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `command`
[INFO] [stderr]   --> src/mu/lib.rs:18:19
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub fn initialize(command: Command) -> Result<(), error::Error> {
[INFO] [stderr]    |                   ^^^^^^^ help: consider prefixing with an underscore: `_command`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.28s
[INFO] running `"docker" "inspect" "11e5098638e362255d9721c2fb68332e711408e0a78a22cfbbc2e6c3c6357e26"`
[INFO] running `"docker" "rm" "-f" "11e5098638e362255d9721c2fb68332e711408e0a78a22cfbbc2e6c3c6357e26"`
[INFO] [stdout] 11e5098638e362255d9721c2fb68332e711408e0a78a22cfbbc2e6c3c6357e26
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jroesch/mu:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 48535b5dbdcfed3fe7e7f1b720cc7dfb1dc27d74a03516a4dffd4f991b49c7cb
[INFO] running `"docker" "start" "-a" "48535b5dbdcfed3fe7e7f1b720cc7dfb1dc27d74a03516a4dffd4f991b49c7cb"`
[INFO] [stderr]    Compiling mu v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/mu/lib.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `command`
[INFO] [stderr]   --> src/mu/lib.rs:18:19
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub fn initialize(command: Command) -> Result<(), error::Error> {
[INFO] [stderr]    |                   ^^^^^^^ help: consider prefixing with an underscore: `_command`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `"docker" "inspect" "48535b5dbdcfed3fe7e7f1b720cc7dfb1dc27d74a03516a4dffd4f991b49c7cb"`
[INFO] running `"docker" "rm" "-f" "48535b5dbdcfed3fe7e7f1b720cc7dfb1dc27d74a03516a4dffd4f991b49c7cb"`
[INFO] [stdout] 48535b5dbdcfed3fe7e7f1b720cc7dfb1dc27d74a03516a4dffd4f991b49c7cb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jroesch/mu:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] b6a6d85f53512ee3a3b515ebeca28de2380b5c3244739f64f84a5735c7ee86a5
[INFO] running `"docker" "start" "-a" "b6a6d85f53512ee3a3b515ebeca28de2380b5c3244739f64f84a5735c7ee86a5"`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mu-efb1adab9560db9d
[INFO] [stderr]    Doc-tests mu
[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" "b6a6d85f53512ee3a3b515ebeca28de2380b5c3244739f64f84a5735c7ee86a5"`
[INFO] running `"docker" "rm" "-f" "b6a6d85f53512ee3a3b515ebeca28de2380b5c3244739f64f84a5735c7ee86a5"`
[INFO] [stdout] b6a6d85f53512ee3a3b515ebeca28de2380b5c3244739f64f84a5735c7ee86a5