[INFO] crate recoreco 0.1.9 is already in cache
[INFO] testing recoreco-0.1.9 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate recoreco 0.1.9 into work/builds/worker-9/source
[INFO] validating manifest of crates.io crate recoreco 0.1.9 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate recoreco 0.1.9
[INFO] finished tweaking crates.io crate recoreco 0.1.9
[INFO] tweaked toml for crates.io crate recoreco 0.1.9 written to work/builds/worker-9/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 4dc634aeb3c3b7bd1ff3ce91d3db27db83c9bb7663a4148f0cba595091dfa212
[INFO] running `"docker" "start" "-a" "4dc634aeb3c3b7bd1ff3ce91d3db27db83c9bb7663a4148f0cba595091dfa212"`
[INFO] [stderr]    Compiling recoreco v0.1.9 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/io.rs:133:10
[INFO] [stderr]     |
[INFO] [stderr] 133 | ) -> Box<Write>
[INFO] [stderr]     |          ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[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] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/bin/indicators.rs:97:21
[INFO] [stderr]    |
[INFO] [stderr] 97 | ) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.55s
[INFO] running `"docker" "inspect" "4dc634aeb3c3b7bd1ff3ce91d3db27db83c9bb7663a4148f0cba595091dfa212"`
[INFO] running `"docker" "rm" "-f" "4dc634aeb3c3b7bd1ff3ce91d3db27db83c9bb7663a4148f0cba595091dfa212"`
[INFO] [stdout] 4dc634aeb3c3b7bd1ff3ce91d3db27db83c9bb7663a4148f0cba595091dfa212
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 095e03fca2122587db4075f3db8c21c7dde18f34d91bf55c7eafda82a67912e5
[INFO] running `"docker" "start" "-a" "095e03fca2122587db4075f3db8c21c7dde18f34d91bf55c7eafda82a67912e5"`
[INFO] [stderr]    Compiling recoreco v0.1.9 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/io.rs:133:10
[INFO] [stderr]     |
[INFO] [stderr] 133 | ) -> Box<Write>
[INFO] [stderr]     |          ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/bin/indicators.rs:97:21
[INFO] [stderr]    |
[INFO] [stderr] 97 | ) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                     ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[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 3.42s
[INFO] running `"docker" "inspect" "095e03fca2122587db4075f3db8c21c7dde18f34d91bf55c7eafda82a67912e5"`
[INFO] running `"docker" "rm" "-f" "095e03fca2122587db4075f3db8c21c7dde18f34d91bf55c7eafda82a67912e5"`
[INFO] [stdout] 095e03fca2122587db4075f3db8c21c7dde18f34d91bf55c7eafda82a67912e5
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] 2092f11aec57cb188a5f5be77a2df0f489e8e7b56b06a958c2aba0a151af91bc
[INFO] running `"docker" "start" "-a" "2092f11aec57cb188a5f5be77a2df0f489e8e7b56b06a958c2aba0a151af91bc"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.18s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/recoreco-93f71d7f04db781e
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test stats::tests::renaming_from_dict ... ok
[INFO] [stdout] test llr::tests::scored_item_ordering_reversed ... ok
[INFO] [stdout] test stats::tests::dict_from_tuple_iterator ... ok
[INFO] [stdout] test llr::tests::topk ... ok
[INFO] [stdout] test stats::tests::dict_from_owned_tuple_iterator ... ok
[INFO] [stdout] test usage_tests::tests::programmatic_usage ... ok
[INFO] [stdout] test llr::tests::llr ... 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/rustwide/target/debug/deps/recoreco-715e476c2c0b9c2c
[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" "2092f11aec57cb188a5f5be77a2df0f489e8e7b56b06a958c2aba0a151af91bc"`
[INFO] running `"docker" "rm" "-f" "2092f11aec57cb188a5f5be77a2df0f489e8e7b56b06a958c2aba0a151af91bc"`
[INFO] [stdout] 2092f11aec57cb188a5f5be77a2df0f489e8e7b56b06a958c2aba0a151af91bc