[INFO] updating cached repository sscdotopen/recoreco
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sscdotopen/recoreco
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sscdotopen/recoreco" "work/ex/beta-1.37-6/sources/1.36.0/gh/sscdotopen/recoreco"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/sscdotopen/recoreco'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sscdotopen/recoreco" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sscdotopen/recoreco"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sscdotopen/recoreco'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d46fb314219a3039d53f2592f276e3751178e05e
[INFO] sha for GitHub repo sscdotopen/recoreco: d46fb314219a3039d53f2592f276e3751178e05e
[INFO] validating manifest of sscdotopen/recoreco 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 sscdotopen/recoreco 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 sscdotopen/recoreco
[INFO] finished frobbing sscdotopen/recoreco
[INFO] frobbed toml for sscdotopen/recoreco written to work/ex/beta-1.37-6/sources/1.36.0/gh/sscdotopen/recoreco/Cargo.toml
[INFO] started frobbing sscdotopen/recoreco
[INFO] finished frobbing sscdotopen/recoreco
[INFO] frobbed toml for sscdotopen/recoreco written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sscdotopen/recoreco/Cargo.toml
[INFO] crate sscdotopen/recoreco 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing sscdotopen/recoreco 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-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/sscdotopen/recoreco:/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] a2b9262972289ae5b69a3a064f4f579b1d92b137094afef0ca662b1153b54e6f
[INFO] running `"docker" "start" "-a" "a2b9262972289ae5b69a3a064f4f579b1d92b137094afef0ca662b1153b54e6f"`
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling syn v0.14.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling csv-core v0.1.4
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling csv v1.0.1
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.70
[INFO] [stderr]    Compiling recoreco v0.1.9 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:184:17
[INFO] [stderr]     |
[INFO] [stderr] 184 |             let mut user_history = &mut samples_of_a[user_idx];
[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 36.59s
[INFO] running `"docker" "inspect" "a2b9262972289ae5b69a3a064f4f579b1d92b137094afef0ca662b1153b54e6f"`
[INFO] running `"docker" "rm" "-f" "a2b9262972289ae5b69a3a064f4f579b1d92b137094afef0ca662b1153b54e6f"`
[INFO] [stdout] a2b9262972289ae5b69a3a064f4f579b1d92b137094afef0ca662b1153b54e6f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/sscdotopen/recoreco:/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] 21ddde9c67229d971e44eba983c4a7bd00d38183358ce7c19bbcd94d71df55f3
[INFO] running `"docker" "start" "-a" "21ddde9c67229d971e44eba983c4a7bd00d38183358ce7c19bbcd94d71df55f3"`
[INFO] [stderr]    Compiling recoreco v0.1.9 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:184:17
[INFO] [stderr]     |
[INFO] [stderr] 184 |             let mut user_history = &mut samples_of_a[user_idx];
[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 4.88s
[INFO] running `"docker" "inspect" "21ddde9c67229d971e44eba983c4a7bd00d38183358ce7c19bbcd94d71df55f3"`
[INFO] running `"docker" "rm" "-f" "21ddde9c67229d971e44eba983c4a7bd00d38183358ce7c19bbcd94d71df55f3"`
[INFO] [stdout] 21ddde9c67229d971e44eba983c4a7bd00d38183358ce7c19bbcd94d71df55f3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/sscdotopen/recoreco:/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] 50507128106f81a156bdca2a059d90fb9ba15d0901717497fd8e50c7f32a0e2b
[INFO] running `"docker" "start" "-a" "50507128106f81a156bdca2a059d90fb9ba15d0901717497fd8e50c7f32a0e2b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/recoreco-6810099d814a2848
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test llr::tests::scored_item_ordering_reversed ... ok
[INFO] [stdout] test llr::tests::topk ... ok
[INFO] [stdout] test stats::tests::dict_from_owned_tuple_iterator ... ok
[INFO] [stdout] test stats::tests::dict_from_tuple_iterator ... ok
[INFO] [stdout] test stats::tests::renaming_from_dict ... ok
[INFO] [stdout] test llr::tests::llr ... ok
[INFO] [stdout] test usage_tests::tests::programmatic_usage ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/recoreco-488bbe2df27b2337
[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]    Doc-tests recoreco
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - indicators (line 72) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "50507128106f81a156bdca2a059d90fb9ba15d0901717497fd8e50c7f32a0e2b"`
[INFO] running `"docker" "rm" "-f" "50507128106f81a156bdca2a059d90fb9ba15d0901717497fd8e50c7f32a0e2b"`
[INFO] [stdout] 50507128106f81a156bdca2a059d90fb9ba15d0901717497fd8e50c7f32a0e2b