[INFO] updating cached repository daniel-e/primes
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/daniel-e/primes
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/daniel-e/primes" "work/ex/beta-1.37-6/sources/1.36.0/gh/daniel-e/primes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/daniel-e/primes'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/daniel-e/primes" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/daniel-e/primes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/daniel-e/primes'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 099f47eafa278768fe98630d3c14f753c437120c
[INFO] sha for GitHub repo daniel-e/primes: 099f47eafa278768fe98630d3c14f753c437120c
[INFO] validating manifest of daniel-e/primes 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 daniel-e/primes 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 daniel-e/primes
[INFO] finished frobbing daniel-e/primes
[INFO] frobbed toml for daniel-e/primes written to work/ex/beta-1.37-6/sources/1.36.0/gh/daniel-e/primes/Cargo.toml
[INFO] started frobbing daniel-e/primes
[INFO] finished frobbing daniel-e/primes
[INFO] frobbed toml for daniel-e/primes written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/daniel-e/primes/Cargo.toml
[INFO] crate daniel-e/primes already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/daniel-e/primes/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[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 daniel-e/primes 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-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/daniel-e/primes:/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] 116125b891f739601a001ad8a8ca55e658e02c1c9c4a867658dba141f55180fd
[INFO] running `"docker" "start" "-a" "116125b891f739601a001ad8a8ca55e658e02c1c9c4a867658dba141f55180fd"`
[INFO] [stderr]    Compiling palindrom v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `SieveIterator`
[INFO] [stderr]   --> src/main.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct SieveIterator<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `iter`
[INFO] [stderr]   --> src/main.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn iter(&self) -> SieveIterator {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `"docker" "inspect" "116125b891f739601a001ad8a8ca55e658e02c1c9c4a867658dba141f55180fd"`
[INFO] running `"docker" "rm" "-f" "116125b891f739601a001ad8a8ca55e658e02c1c9c4a867658dba141f55180fd"`
[INFO] [stdout] 116125b891f739601a001ad8a8ca55e658e02c1c9c4a867658dba141f55180fd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/daniel-e/primes:/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] e2bcb2d345d964733112684e182b50de83b0f2667b9f705b876635264ff6f6db
[INFO] running `"docker" "start" "-a" "e2bcb2d345d964733112684e182b50de83b0f2667b9f705b876635264ff6f6db"`
[INFO] [stderr]    Compiling palindrom v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `SieveIterator`
[INFO] [stderr]   --> src/main.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct SieveIterator<'a> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `iter`
[INFO] [stderr]   --> src/main.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn iter(&self) -> SieveIterator {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `"docker" "inspect" "e2bcb2d345d964733112684e182b50de83b0f2667b9f705b876635264ff6f6db"`
[INFO] running `"docker" "rm" "-f" "e2bcb2d345d964733112684e182b50de83b0f2667b9f705b876635264ff6f6db"`
[INFO] [stdout] e2bcb2d345d964733112684e182b50de83b0f2667b9f705b876635264ff6f6db
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/daniel-e/primes:/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] 71b0fbb840a0b4e5ef43fce98bfd9be91188bab0af5b5cb7a7fe0721c7fa0d29
[INFO] running `"docker" "start" "-a" "71b0fbb840a0b4e5ef43fce98bfd9be91188bab0af5b5cb7a7fe0721c7fa0d29"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/palindrom-8b3105add9b9b620
[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" "71b0fbb840a0b4e5ef43fce98bfd9be91188bab0af5b5cb7a7fe0721c7fa0d29"`
[INFO] running `"docker" "rm" "-f" "71b0fbb840a0b4e5ef43fce98bfd9be91188bab0af5b5cb7a7fe0721c7fa0d29"`
[INFO] [stdout] 71b0fbb840a0b4e5ef43fce98bfd9be91188bab0af5b5cb7a7fe0721c7fa0d29