[INFO] updating cached repository cowang4/rusty_primes
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cowang4/rusty_primes
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cowang4/rusty_primes" "work/ex/beta-1.38-1/sources/1.37.0/gh/cowang4/rusty_primes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/cowang4/rusty_primes'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cowang4/rusty_primes" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cowang4/rusty_primes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cowang4/rusty_primes'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 46fb5675b79a855986e1a69094d78689c1557b62
[INFO] sha for GitHub repo cowang4/rusty_primes: 46fb5675b79a855986e1a69094d78689c1557b62
[INFO] validating manifest of cowang4/rusty_primes 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 cowang4/rusty_primes 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 cowang4/rusty_primes
[INFO] finished frobbing cowang4/rusty_primes
[INFO] frobbed toml for cowang4/rusty_primes written to work/ex/beta-1.38-1/sources/1.37.0/gh/cowang4/rusty_primes/Cargo.toml
[INFO] started frobbing cowang4/rusty_primes
[INFO] finished frobbing cowang4/rusty_primes
[INFO] frobbed toml for cowang4/rusty_primes written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cowang4/rusty_primes/Cargo.toml
[INFO] crate cowang4/rusty_primes 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 cowang4/rusty_primes against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cowang4/rusty_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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 79e02b7df60f1fa7fadb7336767a86cb47e1d8b3475ce4399106f65b4ade8eb1
[INFO] running `"docker" "start" "-a" "79e02b7df60f1fa7fadb7336767a86cb47e1d8b3475ce4399106f65b4ade8eb1"`
[INFO] [stderr]    Compiling rusty_primes v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
[INFO] [stderr]   --> src/main.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 | /         ((i*i)..n)
[INFO] [stderr] 15 | |             .step_by(i)
[INFO] [stderr] 16 | |             .map(|i| primes[i] = false)
[INFO] [stderr] 17 | |             .collect::<()>();
[INFO] [stderr]    | |_____________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
[INFO] [stderr]   --> src/main.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 | /     primes
[INFO] [stderr] 31 | |         .iter()
[INFO] [stderr] 32 | |         .map(|i| println!("{}", i))
[INFO] [stderr] 33 | |         .collect::<()>();
[INFO] [stderr]    | |_________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `"docker" "inspect" "79e02b7df60f1fa7fadb7336767a86cb47e1d8b3475ce4399106f65b4ade8eb1"`
[INFO] running `"docker" "rm" "-f" "79e02b7df60f1fa7fadb7336767a86cb47e1d8b3475ce4399106f65b4ade8eb1"`
[INFO] [stdout] 79e02b7df60f1fa7fadb7336767a86cb47e1d8b3475ce4399106f65b4ade8eb1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cowang4/rusty_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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9a03497e4c657ae0e5319f75cc2d83584a811473b267097753091a8970b95ab9
[INFO] running `"docker" "start" "-a" "9a03497e4c657ae0e5319f75cc2d83584a811473b267097753091a8970b95ab9"`
[INFO] [stderr]    Compiling rusty_primes v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
[INFO] [stderr]   --> src/main.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 | /         ((i*i)..n)
[INFO] [stderr] 15 | |             .step_by(i)
[INFO] [stderr] 16 | |             .map(|i| primes[i] = false)
[INFO] [stderr] 17 | |             .collect::<()>();
[INFO] [stderr]    | |_____________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
[INFO] [stderr]   --> src/main.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 | /     primes
[INFO] [stderr] 31 | |         .iter()
[INFO] [stderr] 32 | |         .map(|i| println!("{}", i))
[INFO] [stderr] 33 | |         .collect::<()>();
[INFO] [stderr]    | |_________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "9a03497e4c657ae0e5319f75cc2d83584a811473b267097753091a8970b95ab9"`
[INFO] running `"docker" "rm" "-f" "9a03497e4c657ae0e5319f75cc2d83584a811473b267097753091a8970b95ab9"`
[INFO] [stdout] 9a03497e4c657ae0e5319f75cc2d83584a811473b267097753091a8970b95ab9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cowang4/rusty_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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] cfc7e1e7f66f78436614aa71c61549f39fba48a8d2a0fc32b1a4cca180432518
[INFO] running `"docker" "start" "-a" "cfc7e1e7f66f78436614aa71c61549f39fba48a8d2a0fc32b1a4cca180432518"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rusty_primes-d0b9abb357e341e4
[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" "cfc7e1e7f66f78436614aa71c61549f39fba48a8d2a0fc32b1a4cca180432518"`
[INFO] running `"docker" "rm" "-f" "cfc7e1e7f66f78436614aa71c61549f39fba48a8d2a0fc32b1a4cca180432518"`
[INFO] [stdout] cfc7e1e7f66f78436614aa71c61549f39fba48a8d2a0fc32b1a4cca180432518