[INFO] crate backoff 0.1.5 is already in cache
[INFO] extracting crate backoff 0.1.5 into work/ex/beta-1.38-1/sources/1.37.0/reg/backoff/0.1.5
[INFO] extracting crate backoff 0.1.5 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/backoff/0.1.5
[INFO] validating manifest of backoff-0.1.5 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 backoff-0.1.5 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 backoff-0.1.5
[INFO] finished frobbing backoff-0.1.5
[INFO] frobbed toml for backoff-0.1.5 written to work/ex/beta-1.38-1/sources/1.37.0/reg/backoff/0.1.5/Cargo.toml
[INFO] started frobbing backoff-0.1.5
[INFO] finished frobbing backoff-0.1.5
[INFO] frobbed toml for backoff-0.1.5 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/backoff/0.1.5/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 backoff-0.1.5 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-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/backoff/0.1.5:/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] 4a12e9bf166738ffb58a65dfd453efba5a10f2b3bda1c01ec234d05d0cefecf2
[INFO] running `"docker" "start" "-a" "4a12e9bf166738ffb58a65dfd453efba5a10f2b3bda1c01ec234d05d0cefecf2"`
[INFO] [stderr]    Compiling backoff v0.1.5 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:34:64
[INFO] [stderr]    |
[INFO] [stderr] 34 |             Error::Permanent(ref err) => ("Permanent", err as &fmt::Debug),
[INFO] [stderr]    |                                                                ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:35:64
[INFO] [stderr]    |
[INFO] [stderr] 35 |             Error::Transient(ref err) => ("Transient", err as &fmt::Debug),
[INFO] [stderr]    |                                                                ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:51:32
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/error.rs:54:46
[INFO] [stderr]    |
[INFO] [stderr] 54 |             Error::Transient(ref err) => err.cause(),
[INFO] [stderr]    |                                              ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `"docker" "inspect" "4a12e9bf166738ffb58a65dfd453efba5a10f2b3bda1c01ec234d05d0cefecf2"`
[INFO] running `"docker" "rm" "-f" "4a12e9bf166738ffb58a65dfd453efba5a10f2b3bda1c01ec234d05d0cefecf2"`
[INFO] [stdout] 4a12e9bf166738ffb58a65dfd453efba5a10f2b3bda1c01ec234d05d0cefecf2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/backoff/0.1.5:/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] 3d29291e418d1a9af96348711c191af54d5c144c476e67903f3ab5bf0190b8da
[INFO] running `"docker" "start" "-a" "3d29291e418d1a9af96348711c191af54d5c144c476e67903f3ab5bf0190b8da"`
[INFO] [stderr]    Compiling backoff v0.1.5 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:34:64
[INFO] [stderr]    |
[INFO] [stderr] 34 |             Error::Permanent(ref err) => ("Permanent", err as &fmt::Debug),
[INFO] [stderr]    |                                                                ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:35:64
[INFO] [stderr]    |
[INFO] [stderr] 35 |             Error::Transient(ref err) => ("Transient", err as &fmt::Debug),
[INFO] [stderr]    |                                                                ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:51:32
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/error.rs:54:46
[INFO] [stderr]    |
[INFO] [stderr] 54 |             Error::Transient(ref err) => err.cause(),
[INFO] [stderr]    |                                              ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.62s
[INFO] running `"docker" "inspect" "3d29291e418d1a9af96348711c191af54d5c144c476e67903f3ab5bf0190b8da"`
[INFO] running `"docker" "rm" "-f" "3d29291e418d1a9af96348711c191af54d5c144c476e67903f3ab5bf0190b8da"`
[INFO] [stdout] 3d29291e418d1a9af96348711c191af54d5c144c476e67903f3ab5bf0190b8da
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/backoff/0.1.5:/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] bd75f93908d32d3d169e586747fa2eaad55c91315e40d45351a94a0bc9610f83
[INFO] running `"docker" "start" "-a" "bd75f93908d32d3d169e586747fa2eaad55c91315e40d45351a94a0bc9610f83"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.19s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/backoff-61b663b6abd3cdee
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test exponential::get_randomized_interval ... ok
[INFO] [stderr]      Running /opt/crater/target/debug/deps/exponential-0e6b457d34ea49a2
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/retry-1f189f42f87d7e1e
[INFO] [stdout] running 3 tests
[INFO] [stdout] test get_elapsed_time ... ok
[INFO] [stdout] test max_elapsed_time ... ok
[INFO] [stdout] test backoff ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test permanent_error_immediately_returned ... ok
[INFO] [stderr]    Doc-tests backoff
[INFO] [stdout] test retry ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/lib.rs -  (line 19) ... ignored
[INFO] [stdout] test src/lib.rs -  (line 9) ... ignored
[INFO] [stdout] test src/retry.rs - retry::Operation::retry_notify (line 47) ... ok
[INFO] [stdout] test src/retry.rs - retry::Operation::retry (line 23) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 2 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "bd75f93908d32d3d169e586747fa2eaad55c91315e40d45351a94a0bc9610f83"`
[INFO] running `"docker" "rm" "-f" "bd75f93908d32d3d169e586747fa2eaad55c91315e40d45351a94a0bc9610f83"`
[INFO] [stdout] bd75f93908d32d3d169e586747fa2eaad55c91315e40d45351a94a0bc9610f83