[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[INFO] the lockfile is outdated, regenerating it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 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 42e5f793ef01b80a64b593e03b03ea266b6213d641b5c80f5c4cb9973e56e506
[INFO] running `"docker" "start" "-a" "42e5f793ef01b80a64b593e03b03ea266b6213d641b5c80f5c4cb9973e56e506"`
[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 0.98s
[INFO] running `"docker" "inspect" "42e5f793ef01b80a64b593e03b03ea266b6213d641b5c80f5c4cb9973e56e506"`
[INFO] running `"docker" "rm" "-f" "42e5f793ef01b80a64b593e03b03ea266b6213d641b5c80f5c4cb9973e56e506"`
[INFO] [stdout] 42e5f793ef01b80a64b593e03b03ea266b6213d641b5c80f5c4cb9973e56e506
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 25fed2547450ccee374d233ab450cc37144a62d4ea899cfc6299637306c01b40
[INFO] running `"docker" "start" "-a" "25fed2547450ccee374d233ab450cc37144a62d4ea899cfc6299637306c01b40"`
[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 0.83s
[INFO] running `"docker" "inspect" "25fed2547450ccee374d233ab450cc37144a62d4ea899cfc6299637306c01b40"`
[INFO] running `"docker" "rm" "-f" "25fed2547450ccee374d233ab450cc37144a62d4ea899cfc6299637306c01b40"`
[INFO] [stdout] 25fed2547450ccee374d233ab450cc37144a62d4ea899cfc6299637306c01b40
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 02ff7a75fbf5c15dd778d500822ec41fd5914b5d1fb814c5f0ebafe1cd310bd2
[INFO] running `"docker" "start" "-a" "02ff7a75fbf5c15dd778d500822ec41fd5914b5d1fb814c5f0ebafe1cd310bd2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/palindrom-9fa40690788e98c6
[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" "02ff7a75fbf5c15dd778d500822ec41fd5914b5d1fb814c5f0ebafe1cd310bd2"`
[INFO] running `"docker" "rm" "-f" "02ff7a75fbf5c15dd778d500822ec41fd5914b5d1fb814c5f0ebafe1cd310bd2"`
[INFO] [stdout] 02ff7a75fbf5c15dd778d500822ec41fd5914b5d1fb814c5f0ebafe1cd310bd2