[INFO] updating cached repository yoshuawuyts/exponential-backoff
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/yoshuawuyts/exponential-backoff
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/yoshuawuyts/exponential-backoff" "work/ex/beta-1.38-1/sources/1.37.0/gh/yoshuawuyts/exponential-backoff"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/yoshuawuyts/exponential-backoff'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/yoshuawuyts/exponential-backoff" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yoshuawuyts/exponential-backoff"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yoshuawuyts/exponential-backoff'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 17eede65ff722fe65e8c0ccaa96bc1a0594fcc9f
[INFO] sha for GitHub repo yoshuawuyts/exponential-backoff: 17eede65ff722fe65e8c0ccaa96bc1a0594fcc9f
[INFO] validating manifest of yoshuawuyts/exponential-backoff 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 yoshuawuyts/exponential-backoff 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 yoshuawuyts/exponential-backoff
[INFO] finished frobbing yoshuawuyts/exponential-backoff
[INFO] frobbed toml for yoshuawuyts/exponential-backoff written to work/ex/beta-1.38-1/sources/1.37.0/gh/yoshuawuyts/exponential-backoff/Cargo.toml
[INFO] started frobbing yoshuawuyts/exponential-backoff
[INFO] finished frobbing yoshuawuyts/exponential-backoff
[INFO] frobbed toml for yoshuawuyts/exponential-backoff written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yoshuawuyts/exponential-backoff/Cargo.toml
[INFO] crate yoshuawuyts/exponential-backoff 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 yoshuawuyts/exponential-backoff 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/yoshuawuyts/exponential-backoff:/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] 38b6789a27309b17aa27fd92544177619fc96a599919ddc9b76ba662df7c2fe3
[INFO] running `"docker" "start" "-a" "38b6789a27309b17aa27fd92544177619fc96a599919ddc9b76ba662df7c2fe3"`
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling rand v0.5.3
[INFO] [stderr]    Compiling exponential-backoff v0.2.3-alpha.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.54s
[INFO] running `"docker" "inspect" "38b6789a27309b17aa27fd92544177619fc96a599919ddc9b76ba662df7c2fe3"`
[INFO] running `"docker" "rm" "-f" "38b6789a27309b17aa27fd92544177619fc96a599919ddc9b76ba662df7c2fe3"`
[INFO] [stdout] 38b6789a27309b17aa27fd92544177619fc96a599919ddc9b76ba662df7c2fe3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/yoshuawuyts/exponential-backoff:/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] 7bd3ac816023b25fceaa094dbb372acedfe3f878a6dd937586c8ced7bd66ec7f
[INFO] running `"docker" "start" "-a" "7bd3ac816023b25fceaa094dbb372acedfe3f878a6dd937586c8ced7bd66ec7f"`
[INFO] [stderr]    Compiling exponential-backoff v0.2.3-alpha.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.41s
[INFO] running `"docker" "inspect" "7bd3ac816023b25fceaa094dbb372acedfe3f878a6dd937586c8ced7bd66ec7f"`
[INFO] running `"docker" "rm" "-f" "7bd3ac816023b25fceaa094dbb372acedfe3f878a6dd937586c8ced7bd66ec7f"`
[INFO] [stdout] 7bd3ac816023b25fceaa094dbb372acedfe3f878a6dd937586c8ced7bd66ec7f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/yoshuawuyts/exponential-backoff:/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] 9c0967d9b9c212b76873b7b888a83d919c61a89d367f47408ddd983bff25d2e8
[INFO] running `"docker" "start" "-a" "9c0967d9b9c212b76873b7b888a83d919c61a89d367f47408ddd983bff25d2e8"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/exponential_backoff-1b060a23825f0953
[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]      Running /opt/crater/target/debug/deps/test-344f88bc32fd0dc8
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test doesnt_crash ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests exponential-backoff
[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" "9c0967d9b9c212b76873b7b888a83d919c61a89d367f47408ddd983bff25d2e8"`
[INFO] running `"docker" "rm" "-f" "9c0967d9b9c212b76873b7b888a83d919c61a89d367f47408ddd983bff25d2e8"`
[INFO] [stdout] 9c0967d9b9c212b76873b7b888a83d919c61a89d367f47408ddd983bff25d2e8