[INFO] updating cached repository dulynoted/project_euler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dulynoted/project_euler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dulynoted/project_euler" "work/ex/beta-1.38-1/sources/1.37.0/gh/dulynoted/project_euler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/dulynoted/project_euler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dulynoted/project_euler" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dulynoted/project_euler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dulynoted/project_euler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f5eb02fafc2fda6db75a3a7227644e6ed993d099
[INFO] sha for GitHub repo dulynoted/project_euler: f5eb02fafc2fda6db75a3a7227644e6ed993d099
[INFO] validating manifest of dulynoted/project_euler 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 dulynoted/project_euler 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 dulynoted/project_euler
[INFO] finished frobbing dulynoted/project_euler
[INFO] frobbed toml for dulynoted/project_euler written to work/ex/beta-1.38-1/sources/1.37.0/gh/dulynoted/project_euler/Cargo.toml
[INFO] started frobbing dulynoted/project_euler
[INFO] finished frobbing dulynoted/project_euler
[INFO] frobbed toml for dulynoted/project_euler written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dulynoted/project_euler/Cargo.toml
[INFO] crate dulynoted/project_euler 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/dulynoted/project_euler/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[INFO] the lockfile is outdated, regenerating it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" "+1.37.0" "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 dulynoted/project_euler 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/dulynoted/project_euler:/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] 6ccc6a7b043b76720a765f2e1af1c99613dc3b75f32d5ec61c7af94bc1a6fc97
[INFO] running `"docker" "start" "-a" "6ccc6a7b043b76720a765f2e1af1c99613dc3b75f32d5ec61c7af94bc1a6fc97"`
[INFO] [stderr]    Compiling hamming v0.1.3
[INFO] [stderr]    Compiling primal-estimate v0.2.1
[INFO] [stderr]    Compiling bit-vec v0.6.1
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling primal-bit v0.2.4
[INFO] [stderr]    Compiling primal-sieve v0.2.9
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling primal-check v0.2.3
[INFO] [stderr]    Compiling primal v0.2.3
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling project_euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `num::pow`
[INFO] [stderr]  --> src/common.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use num::pow;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.65s
[INFO] running `"docker" "inspect" "6ccc6a7b043b76720a765f2e1af1c99613dc3b75f32d5ec61c7af94bc1a6fc97"`
[INFO] running `"docker" "rm" "-f" "6ccc6a7b043b76720a765f2e1af1c99613dc3b75f32d5ec61c7af94bc1a6fc97"`
[INFO] [stdout] 6ccc6a7b043b76720a765f2e1af1c99613dc3b75f32d5ec61c7af94bc1a6fc97
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/dulynoted/project_euler:/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] 8f39e611696faf6453d28450d7060eeadff02e38a962f251cb44e8c881aa27d8
[INFO] running `"docker" "start" "-a" "8f39e611696faf6453d28450d7060eeadff02e38a962f251cb44e8c881aa27d8"`
[INFO] [stderr]    Compiling project_euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `num::pow`
[INFO] [stderr]  --> src/common.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use num::pow;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `"docker" "inspect" "8f39e611696faf6453d28450d7060eeadff02e38a962f251cb44e8c881aa27d8"`
[INFO] running `"docker" "rm" "-f" "8f39e611696faf6453d28450d7060eeadff02e38a962f251cb44e8c881aa27d8"`
[INFO] [stdout] 8f39e611696faf6453d28450d7060eeadff02e38a962f251cb44e8c881aa27d8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/dulynoted/project_euler:/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] 22bf8e47bf72cd46859f81f93b8712dbeba03133c2b963a3869ae5b9cbc2a5b5
[INFO] running `"docker" "start" "-a" "22bf8e47bf72cd46859f81f93b8712dbeba03133c2b963a3869ae5b9cbc2a5b5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/project_euler-86f0ae9ade6febd0
[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" "22bf8e47bf72cd46859f81f93b8712dbeba03133c2b963a3869ae5b9cbc2a5b5"`
[INFO] running `"docker" "rm" "-f" "22bf8e47bf72cd46859f81f93b8712dbeba03133c2b963a3869ae5b9cbc2a5b5"`
[INFO] [stdout] 22bf8e47bf72cd46859f81f93b8712dbeba03133c2b963a3869ae5b9cbc2a5b5