[INFO] updating cached repository mjl152/rust-euler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mjl152/rust-euler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mjl152/rust-euler" "work/ex/beta-1.38-1/sources/1.37.0/gh/mjl152/rust-euler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mjl152/rust-euler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mjl152/rust-euler" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mjl152/rust-euler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mjl152/rust-euler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cf3eed55ee1ace81d88f24764707341ef0df4aa7
[INFO] sha for GitHub repo mjl152/rust-euler: cf3eed55ee1ace81d88f24764707341ef0df4aa7
[INFO] validating manifest of mjl152/rust-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 mjl152/rust-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 mjl152/rust-euler
[INFO] finished frobbing mjl152/rust-euler
[INFO] frobbed toml for mjl152/rust-euler written to work/ex/beta-1.38-1/sources/1.37.0/gh/mjl152/rust-euler/Cargo.toml
[INFO] started frobbing mjl152/rust-euler
[INFO] finished frobbing mjl152/rust-euler
[INFO] frobbed toml for mjl152/rust-euler written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mjl152/rust-euler/Cargo.toml
[INFO] crate mjl152/rust-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/mjl152/rust-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[INFO] the lockfile is outdated, regenerating it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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing mjl152/rust-euler 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-2/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/mjl152/rust-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 6229e5c1195b6ae859be39ebb7146f5b47de566702a2de1736ffb8a6125b782a
[INFO] running `"docker" "start" "-a" "6229e5c1195b6ae859be39ebb7146f5b47de566702a2de1736ffb8a6125b782a"`
[INFO] [stderr]    Compiling rust_euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/main.rs:47:6
[INFO] [stderr]    |
[INFO] [stderr] 47 |     for i in 0..iterations {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:33:6
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let mut problem : fn() -> Option<u64>;
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.48s
[INFO] running `"docker" "inspect" "6229e5c1195b6ae859be39ebb7146f5b47de566702a2de1736ffb8a6125b782a"`
[INFO] running `"docker" "rm" "-f" "6229e5c1195b6ae859be39ebb7146f5b47de566702a2de1736ffb8a6125b782a"`
[INFO] [stdout] 6229e5c1195b6ae859be39ebb7146f5b47de566702a2de1736ffb8a6125b782a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/mjl152/rust-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 649139a5b8ed97f7506fa9c45f82f7a3fc39a769fdd57275eacf1905dba6d96b
[INFO] running `"docker" "start" "-a" "649139a5b8ed97f7506fa9c45f82f7a3fc39a769fdd57275eacf1905dba6d96b"`
[INFO] [stderr]    Compiling rust_euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/main.rs:47:6
[INFO] [stderr]    |
[INFO] [stderr] 47 |     for i in 0..iterations {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:33:6
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let mut problem : fn() -> Option<u64>;
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.24s
[INFO] running `"docker" "inspect" "649139a5b8ed97f7506fa9c45f82f7a3fc39a769fdd57275eacf1905dba6d96b"`
[INFO] running `"docker" "rm" "-f" "649139a5b8ed97f7506fa9c45f82f7a3fc39a769fdd57275eacf1905dba6d96b"`
[INFO] [stdout] 649139a5b8ed97f7506fa9c45f82f7a3fc39a769fdd57275eacf1905dba6d96b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/mjl152/rust-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] c9e1201bfa5cccf1cc1b318b5d066a94d91f197ecd2c3cb6c21ebdc9156a0728
[INFO] running `"docker" "start" "-a" "c9e1201bfa5cccf1cc1b318b5d066a94d91f197ecd2c3cb6c21ebdc9156a0728"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_euler-cbe45a5b3e7cca66
[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] [stderr]      Running /opt/crater/target/debug/deps/rust_euler_bin-f286204f28eb5fed
[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] [stderr]      Running /opt/crater/target/debug/deps/lib-73a2b951c861bdb9
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::function_1 ... ok
[INFO] [stdout] test tests::function_2 ... ok
[INFO] [stdout] test tests::function_3 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust_euler
[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" "c9e1201bfa5cccf1cc1b318b5d066a94d91f197ecd2c3cb6c21ebdc9156a0728"`
[INFO] running `"docker" "rm" "-f" "c9e1201bfa5cccf1cc1b318b5d066a94d91f197ecd2c3cb6c21ebdc9156a0728"`
[INFO] [stdout] c9e1201bfa5cccf1cc1b318b5d066a94d91f197ecd2c3cb6c21ebdc9156a0728