[INFO] crate futures-backoff 0.1.0 is already in cache
[INFO] extracting crate futures-backoff 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/futures-backoff/0.1.0
[INFO] extracting crate futures-backoff 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/futures-backoff/0.1.0
[INFO] validating manifest of futures-backoff-0.1.0 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 futures-backoff-0.1.0 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 futures-backoff-0.1.0
[INFO] finished frobbing futures-backoff-0.1.0
[INFO] frobbed toml for futures-backoff-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/futures-backoff/0.1.0/Cargo.toml
[INFO] started frobbing futures-backoff-0.1.0
[INFO] finished frobbing futures-backoff-0.1.0
[INFO] frobbed toml for futures-backoff-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/futures-backoff/0.1.0/Cargo.toml
[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 futures-backoff-0.1.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/futures-backoff/0.1.0:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 6ee1f1510a4d723971c479b1f42d3f04deec7c41fbc162286c8a80b2a99b7567
[INFO] running `"docker" "start" "-a" "6ee1f1510a4d723971c479b1f42d3f04deec7c41fbc162286c8a80b2a99b7567"`
[INFO] [stderr]    Compiling futures-timer v0.1.1
[INFO] [stderr]    Compiling futures-backoff v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.40s
[INFO] running `"docker" "inspect" "6ee1f1510a4d723971c479b1f42d3f04deec7c41fbc162286c8a80b2a99b7567"`
[INFO] running `"docker" "rm" "-f" "6ee1f1510a4d723971c479b1f42d3f04deec7c41fbc162286c8a80b2a99b7567"`
[INFO] [stdout] 6ee1f1510a4d723971c479b1f42d3f04deec7c41fbc162286c8a80b2a99b7567
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/futures-backoff/0.1.0:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] d7f73c1f8130d96fdc225e10e86d93882dfcc8cd6b86c7644763a7a52d635d84
[INFO] running `"docker" "start" "-a" "d7f73c1f8130d96fdc225e10e86d93882dfcc8cd6b86c7644763a7a52d635d84"`
[INFO] [stderr]    Compiling futures-backoff v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.62s
[INFO] running `"docker" "inspect" "d7f73c1f8130d96fdc225e10e86d93882dfcc8cd6b86c7644763a7a52d635d84"`
[INFO] running `"docker" "rm" "-f" "d7f73c1f8130d96fdc225e10e86d93882dfcc8cd6b86c7644763a7a52d635d84"`
[INFO] [stdout] d7f73c1f8130d96fdc225e10e86d93882dfcc8cd6b86c7644763a7a52d635d84
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/futures-backoff/0.1.0:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 7552df595c7c37a80b4bda85c7e4cc5392d377ee6f1d9d3fdc4b55107f562de7
[INFO] running `"docker" "start" "-a" "7552df595c7c37a80b4bda85c7e4cc5392d377ee6f1d9d3fdc4b55107f562de7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/futures_backoff-b49cdd021b78a392
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test strategy::exponential_returns_multiples_of_100ms ... ok
[INFO] [stdout] test strategy::exponential_returns_multiples_of_10ms ... ok
[INFO] [stdout] test strategy::exponential_stops_increasing_at_max_delay ... ok
[INFO] [stdout] test strategy::exponential_returns_max_when_max_less_than_base ... ok
[INFO] [stdout] test strategy::fibonacci_returns_max_when_max_less_than_base ... ok
[INFO] [stdout] test strategy::fibonacci_returns_the_fibonacci_series_starting_at_10 ... ok
[INFO] [stdout] test strategy::fibonacci_stops_increasing_at_max_delay ... ok
[INFO] [stdout] test strategy::fixed_returns_delay ... ok
[INFO] [stdout] test future::tests::attempts_just_once ... ok
[INFO] [stdout] test strategy::jitter::apply_jitter_quickcheck ... ok
[INFO] [stdout] test future::tests::attempts_until_max_retries_exceeded ... ok
[INFO] [stdout] test future::tests::attempts_retry_only_if_given_condition_is_true ... ok
[INFO] [stdout] test future::tests::attempts_until_success ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests futures-backoff
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/lib.rs -  (line 19) ... ok
[INFO] [stdout] test src/strategy/mod.rs - strategy::Strategy (line 29) ... ok
[INFO] [stdout] test src/lib.rs - retry (line 60) ... ok
[INFO] [stdout] test src/lib.rs - retry_if (line 87) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "7552df595c7c37a80b4bda85c7e4cc5392d377ee6f1d9d3fdc4b55107f562de7"`
[INFO] running `"docker" "rm" "-f" "7552df595c7c37a80b4bda85c7e4cc5392d377ee6f1d9d3fdc4b55107f562de7"`
[INFO] [stdout] 7552df595c7c37a80b4bda85c7e4cc5392d377ee6f1d9d3fdc4b55107f562de7