[INFO] updating cached repository ScottONeal/ensync
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ScottONeal/ensync
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ScottONeal/ensync" "work/ex/beta-1.38-1/sources/1.37.0/gh/ScottONeal/ensync"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ScottONeal/ensync'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ScottONeal/ensync" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ScottONeal/ensync"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ScottONeal/ensync'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 708fe6a60b3c7836449173fde5a744ccdd9f0809
[INFO] sha for GitHub repo ScottONeal/ensync: 708fe6a60b3c7836449173fde5a744ccdd9f0809
[INFO] validating manifest of ScottONeal/ensync 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 ScottONeal/ensync 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 ScottONeal/ensync
[INFO] finished frobbing ScottONeal/ensync
[INFO] frobbed toml for ScottONeal/ensync written to work/ex/beta-1.38-1/sources/1.37.0/gh/ScottONeal/ensync/Cargo.toml
[INFO] started frobbing ScottONeal/ensync
[INFO] finished frobbing ScottONeal/ensync
[INFO] frobbed toml for ScottONeal/ensync written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ScottONeal/ensync/Cargo.toml
[INFO] crate ScottONeal/ensync 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 ScottONeal/ensync against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ScottONeal/ensync:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 47b0e9a95254c0cd644826b66694fda93cd946d830dce2bc7bce19c6f51eb66e
[INFO] running `"docker" "start" "-a" "47b0e9a95254c0cd644826b66694fda93cd946d830dce2bc7bce19c6f51eb66e"`
[INFO] [stderr]    Compiling ensync v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut options;
[INFO] [stderr]   |         ----^^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `"docker" "inspect" "47b0e9a95254c0cd644826b66694fda93cd946d830dce2bc7bce19c6f51eb66e"`
[INFO] running `"docker" "rm" "-f" "47b0e9a95254c0cd644826b66694fda93cd946d830dce2bc7bce19c6f51eb66e"`
[INFO] [stdout] 47b0e9a95254c0cd644826b66694fda93cd946d830dce2bc7bce19c6f51eb66e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ScottONeal/ensync:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 2a341bdc5c49d2ef47aaabe7137226238aa9c1452dc20d6231803a5c958f86ff
[INFO] running `"docker" "start" "-a" "2a341bdc5c49d2ef47aaabe7137226238aa9c1452dc20d6231803a5c958f86ff"`
[INFO] [stderr]    Compiling ensync v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut options;
[INFO] [stderr]   |         ----^^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "2a341bdc5c49d2ef47aaabe7137226238aa9c1452dc20d6231803a5c958f86ff"`
[INFO] running `"docker" "rm" "-f" "2a341bdc5c49d2ef47aaabe7137226238aa9c1452dc20d6231803a5c958f86ff"`
[INFO] [stdout] 2a341bdc5c49d2ef47aaabe7137226238aa9c1452dc20d6231803a5c958f86ff
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ScottONeal/ensync:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 868ca1ccf1da2ee67ee1bbc6547ea036636d592e0c1b016a7a4efd147c31406f
[INFO] running `"docker" "start" "-a" "868ca1ccf1da2ee67ee1bbc6547ea036636d592e0c1b016a7a4efd147c31406f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ensync-24223c5719480640
[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" "868ca1ccf1da2ee67ee1bbc6547ea036636d592e0c1b016a7a4efd147c31406f"`
[INFO] running `"docker" "rm" "-f" "868ca1ccf1da2ee67ee1bbc6547ea036636d592e0c1b016a7a4efd147c31406f"`
[INFO] [stdout] 868ca1ccf1da2ee67ee1bbc6547ea036636d592e0c1b016a7a4efd147c31406f