[INFO] updating cached repository steveklabnik/optexample
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/steveklabnik/optexample
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/steveklabnik/optexample" "work/ex/beta-1.37-6/sources/1.36.0/gh/steveklabnik/optexample"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/steveklabnik/optexample'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/steveklabnik/optexample" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/steveklabnik/optexample"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/steveklabnik/optexample'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 268ab93748c9ee8aea4562337038caa1d678e6f1
[INFO] sha for GitHub repo steveklabnik/optexample: 268ab93748c9ee8aea4562337038caa1d678e6f1
[INFO] validating manifest of steveklabnik/optexample 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 steveklabnik/optexample 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 steveklabnik/optexample
[INFO] finished frobbing steveklabnik/optexample
[INFO] frobbed toml for steveklabnik/optexample written to work/ex/beta-1.37-6/sources/1.36.0/gh/steveklabnik/optexample/Cargo.toml
[INFO] started frobbing steveklabnik/optexample
[INFO] finished frobbing steveklabnik/optexample
[INFO] frobbed toml for steveklabnik/optexample written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/steveklabnik/optexample/Cargo.toml
[INFO] crate steveklabnik/optexample 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/steveklabnik/optexample/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[INFO] the lockfile is outdated, regenerating it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 steveklabnik/optexample 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-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/steveklabnik/optexample:/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] eeae0905cea73a835f9ecf808efbd84f6850ffb88033914452c59831883d63e7
[INFO] running `"docker" "start" "-a" "eeae0905cea73a835f9ecf808efbd84f6850ffb88033914452c59831883d63e7"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]    Compiling optexample v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::slice::SliceConcatExt::connect': renamed to join
[INFO] [stderr]   --> src/main.rs:55:35
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let string = matches.free.connect(" ");
[INFO] [stderr]    |                                   ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `"docker" "inspect" "eeae0905cea73a835f9ecf808efbd84f6850ffb88033914452c59831883d63e7"`
[INFO] running `"docker" "rm" "-f" "eeae0905cea73a835f9ecf808efbd84f6850ffb88033914452c59831883d63e7"`
[INFO] [stdout] eeae0905cea73a835f9ecf808efbd84f6850ffb88033914452c59831883d63e7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/steveklabnik/optexample:/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] 494a694dff5f11ee7d5c862b637484060480584caf9e764391d1f42d462edf9c
[INFO] running `"docker" "start" "-a" "494a694dff5f11ee7d5c862b637484060480584caf9e764391d1f42d462edf9c"`
[INFO] [stderr]    Compiling optexample v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::slice::SliceConcatExt::connect': renamed to join
[INFO] [stderr]   --> src/main.rs:55:35
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let string = matches.free.connect(" ");
[INFO] [stderr]    |                                   ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `"docker" "inspect" "494a694dff5f11ee7d5c862b637484060480584caf9e764391d1f42d462edf9c"`
[INFO] running `"docker" "rm" "-f" "494a694dff5f11ee7d5c862b637484060480584caf9e764391d1f42d462edf9c"`
[INFO] [stdout] 494a694dff5f11ee7d5c862b637484060480584caf9e764391d1f42d462edf9c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/steveklabnik/optexample:/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] fd69a606a2bd0d95d896c59356a01e083dbb1f97b922e6ab9fd0f4e43ec3768d
[INFO] running `"docker" "start" "-a" "fd69a606a2bd0d95d896c59356a01e083dbb1f97b922e6ab9fd0f4e43ec3768d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/optexample-2eeb3ad5ee7a9376
[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" "fd69a606a2bd0d95d896c59356a01e083dbb1f97b922e6ab9fd0f4e43ec3768d"`
[INFO] running `"docker" "rm" "-f" "fd69a606a2bd0d95d896c59356a01e083dbb1f97b922e6ab9fd0f4e43ec3768d"`
[INFO] [stdout] fd69a606a2bd0d95d896c59356a01e083dbb1f97b922e6ab9fd0f4e43ec3768d