[INFO] updating cached repository wspeirs/jump-consistent-hashing
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/wspeirs/jump-consistent-hashing
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/wspeirs/jump-consistent-hashing" "work/ex/beta-1.38-1/sources/1.37.0/gh/wspeirs/jump-consistent-hashing"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/wspeirs/jump-consistent-hashing'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/wspeirs/jump-consistent-hashing" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wspeirs/jump-consistent-hashing"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wspeirs/jump-consistent-hashing'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c00759bb94789fe7dcd35622e35e3491af12e42e
[INFO] sha for GitHub repo wspeirs/jump-consistent-hashing: c00759bb94789fe7dcd35622e35e3491af12e42e
[INFO] validating manifest of wspeirs/jump-consistent-hashing 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 wspeirs/jump-consistent-hashing 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 wspeirs/jump-consistent-hashing
[INFO] finished frobbing wspeirs/jump-consistent-hashing
[INFO] frobbed toml for wspeirs/jump-consistent-hashing written to work/ex/beta-1.38-1/sources/1.37.0/gh/wspeirs/jump-consistent-hashing/Cargo.toml
[INFO] started frobbing wspeirs/jump-consistent-hashing
[INFO] finished frobbing wspeirs/jump-consistent-hashing
[INFO] frobbed toml for wspeirs/jump-consistent-hashing written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wspeirs/jump-consistent-hashing/Cargo.toml
[INFO] crate wspeirs/jump-consistent-hashing 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 wspeirs/jump-consistent-hashing 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-1/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/wspeirs/jump-consistent-hashing:/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] bc2e037895acc1f3e82fad62ccda3fd98f8d2167b74e459485363ec5d7ea5f7c
[INFO] running `"docker" "start" "-a" "bc2e037895acc1f3e82fad62ccda3fd98f8d2167b74e459485363ec5d7ea5f7c"`
[INFO] [stderr]    Compiling jump-consistent-hashing v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/main.rs:4:86
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn assign_servers(key: u64, num_servers: u64, copies: usize) -> Result<Vec<u64>, Box<Error>> {
[INFO] [stderr]   |                                                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `"docker" "inspect" "bc2e037895acc1f3e82fad62ccda3fd98f8d2167b74e459485363ec5d7ea5f7c"`
[INFO] running `"docker" "rm" "-f" "bc2e037895acc1f3e82fad62ccda3fd98f8d2167b74e459485363ec5d7ea5f7c"`
[INFO] [stdout] bc2e037895acc1f3e82fad62ccda3fd98f8d2167b74e459485363ec5d7ea5f7c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/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/wspeirs/jump-consistent-hashing:/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] 0614c63323c66e8c8c44cb6293811e1cdaac2d80074b0b0ce4feca4b78d090e3
[INFO] running `"docker" "start" "-a" "0614c63323c66e8c8c44cb6293811e1cdaac2d80074b0b0ce4feca4b78d090e3"`
[INFO] [stderr]    Compiling jump-consistent-hashing v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/main.rs:4:86
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn assign_servers(key: u64, num_servers: u64, copies: usize) -> Result<Vec<u64>, Box<Error>> {
[INFO] [stderr]   |                                                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `"docker" "inspect" "0614c63323c66e8c8c44cb6293811e1cdaac2d80074b0b0ce4feca4b78d090e3"`
[INFO] running `"docker" "rm" "-f" "0614c63323c66e8c8c44cb6293811e1cdaac2d80074b0b0ce4feca4b78d090e3"`
[INFO] [stdout] 0614c63323c66e8c8c44cb6293811e1cdaac2d80074b0b0ce4feca4b78d090e3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/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/wspeirs/jump-consistent-hashing:/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] 0ce4c6b53ada51ae360e7dc69557edf431280a5c6e1c249994db3c30f00996cb
[INFO] running `"docker" "start" "-a" "0ce4c6b53ada51ae360e7dc69557edf431280a5c6e1c249994db3c30f00996cb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/jump_consistent_hashing-8eda40b152a3f260
[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" "0ce4c6b53ada51ae360e7dc69557edf431280a5c6e1c249994db3c30f00996cb"`
[INFO] running `"docker" "rm" "-f" "0ce4c6b53ada51ae360e7dc69557edf431280a5c6e1c249994db3c30f00996cb"`
[INFO] [stdout] 0ce4c6b53ada51ae360e7dc69557edf431280a5c6e1c249994db3c30f00996cb