[INFO] updating cached repository prevy/prevy-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/prevy/prevy-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/prevy/prevy-rust" "work/ex/beta-1.37-6/sources/1.36.0/gh/prevy/prevy-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/prevy/prevy-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/prevy/prevy-rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/prevy/prevy-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/prevy/prevy-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b8e392dc545f284440a4ddda2bdf23e78ec83cc4
[INFO] sha for GitHub repo prevy/prevy-rust: b8e392dc545f284440a4ddda2bdf23e78ec83cc4
[INFO] validating manifest of prevy/prevy-rust 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 prevy/prevy-rust 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 prevy/prevy-rust
[INFO] finished frobbing prevy/prevy-rust
[INFO] frobbed toml for prevy/prevy-rust written to work/ex/beta-1.37-6/sources/1.36.0/gh/prevy/prevy-rust/Cargo.toml
[INFO] started frobbing prevy/prevy-rust
[INFO] finished frobbing prevy/prevy-rust
[INFO] frobbed toml for prevy/prevy-rust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/prevy/prevy-rust/Cargo.toml
[INFO] crate prevy/prevy-rust 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] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/prevy/prevy-rust/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing prevy/prevy-rust 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-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/prevy/prevy-rust:/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] decb6350e0aaad8f430574dd6748f77e43215c338c3d89f89a4248524f56d87c
[INFO] running `"docker" "start" "-a" "decb6350e0aaad8f430574dd6748f77e43215c338c3d89f89a4248524f56d87c"`
[INFO] [stderr]    Compiling xdg-basedir v1.0.0
[INFO] [stderr]    Compiling ansi_term v0.7.5
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling atty v0.1.2
[INFO] [stderr]    Compiling prevy v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]   --> src/core/constants.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     var.trim_left_matches(VAR_PREFIX).to_lowercase().to_string()
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_start_matches`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rx`
[INFO] [stderr]   --> src/commands/update.rs:13:18
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let (tx, rx) = channel();
[INFO] [stderr]    |                  ^^ help: consider prefixing with an underscore: `_rx`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Update`
[INFO] [stderr]  --> src/commands/update.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub struct Update;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.31s
[INFO] running `"docker" "inspect" "decb6350e0aaad8f430574dd6748f77e43215c338c3d89f89a4248524f56d87c"`
[INFO] running `"docker" "rm" "-f" "decb6350e0aaad8f430574dd6748f77e43215c338c3d89f89a4248524f56d87c"`
[INFO] [stdout] decb6350e0aaad8f430574dd6748f77e43215c338c3d89f89a4248524f56d87c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/prevy/prevy-rust:/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] 47a48490b7aaf6f64e87586db335300bd0614affc48636864eb53a7436b7d567
[INFO] running `"docker" "start" "-a" "47a48490b7aaf6f64e87586db335300bd0614affc48636864eb53a7436b7d567"`
[INFO] [stderr]    Compiling prevy v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]   --> src/core/constants.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     var.trim_left_matches(VAR_PREFIX).to_lowercase().to_string()
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_start_matches`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rx`
[INFO] [stderr]   --> src/commands/update.rs:13:18
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let (tx, rx) = channel();
[INFO] [stderr]    |                  ^^ help: consider prefixing with an underscore: `_rx`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Update`
[INFO] [stderr]  --> src/commands/update.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub struct Update;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "47a48490b7aaf6f64e87586db335300bd0614affc48636864eb53a7436b7d567"`
[INFO] running `"docker" "rm" "-f" "47a48490b7aaf6f64e87586db335300bd0614affc48636864eb53a7436b7d567"`
[INFO] [stdout] 47a48490b7aaf6f64e87586db335300bd0614affc48636864eb53a7436b7d567
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/prevy/prevy-rust:/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] 0e57c4d16fad88face10041805624a9c7a666ddf3010bbcce9734940b80108e2
[INFO] running `"docker" "start" "-a" "0e57c4d16fad88face10041805624a9c7a666ddf3010bbcce9734940b80108e2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/prevy-8ab1bef50766fc8e
[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" "0e57c4d16fad88face10041805624a9c7a666ddf3010bbcce9734940b80108e2"`
[INFO] running `"docker" "rm" "-f" "0e57c4d16fad88face10041805624a9c7a666ddf3010bbcce9734940b80108e2"`
[INFO] [stdout] 0e57c4d16fad88face10041805624a9c7a666ddf3010bbcce9734940b80108e2