[INFO] updating cached repository sscdotopen/puppies
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sscdotopen/puppies
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sscdotopen/puppies" "work/ex/beta-1.38-1/sources/1.37.0/gh/sscdotopen/puppies"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/sscdotopen/puppies'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sscdotopen/puppies" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sscdotopen/puppies"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sscdotopen/puppies'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c51e6a702c8cdbe4d8d271cce9687174af290b8f
[INFO] sha for GitHub repo sscdotopen/puppies: c51e6a702c8cdbe4d8d271cce9687174af290b8f
[INFO] validating manifest of sscdotopen/puppies 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 sscdotopen/puppies 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 sscdotopen/puppies
[INFO] finished frobbing sscdotopen/puppies
[INFO] frobbed toml for sscdotopen/puppies written to work/ex/beta-1.38-1/sources/1.37.0/gh/sscdotopen/puppies/Cargo.toml
[INFO] started frobbing sscdotopen/puppies
[INFO] finished frobbing sscdotopen/puppies
[INFO] frobbed toml for sscdotopen/puppies written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sscdotopen/puppies/Cargo.toml
[INFO] crate sscdotopen/puppies 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 sscdotopen/puppies 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-3/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/sscdotopen/puppies:/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] e4247b32fe17220a53931dd323d5d3c7d6a0ea6ea21bf99f2914f2773764ba90
[INFO] running `"docker" "start" "-a" "e4247b32fe17220a53931dd323d5d3c7d6a0ea6ea21bf99f2914f2773764ba90"`
[INFO] [stderr]    Compiling bencher v0.1.3
[INFO] [stderr]    Compiling csv v0.15.0
[INFO] [stderr]    Compiling puppies v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:83:21
[INFO] [stderr]    |
[INFO] [stderr] 83 |                 let mut user_history = samples_of_a.get_mut(user_idx).unwrap();
[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 6.65s
[INFO] running `"docker" "inspect" "e4247b32fe17220a53931dd323d5d3c7d6a0ea6ea21bf99f2914f2773764ba90"`
[INFO] running `"docker" "rm" "-f" "e4247b32fe17220a53931dd323d5d3c7d6a0ea6ea21bf99f2914f2773764ba90"`
[INFO] [stdout] e4247b32fe17220a53931dd323d5d3c7d6a0ea6ea21bf99f2914f2773764ba90
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/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/sscdotopen/puppies:/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] 5a525b5567a7b84c3dda82f2db00394a47e4b90b09867c12141a0c729289ff80
[INFO] running `"docker" "start" "-a" "5a525b5567a7b84c3dda82f2db00394a47e4b90b09867c12141a0c729289ff80"`
[INFO] [stderr]    Compiling puppies v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:83:21
[INFO] [stderr]    |
[INFO] [stderr] 83 |                 let mut user_history = samples_of_a.get_mut(user_idx).unwrap();
[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 2.15s
[INFO] running `"docker" "inspect" "5a525b5567a7b84c3dda82f2db00394a47e4b90b09867c12141a0c729289ff80"`
[INFO] running `"docker" "rm" "-f" "5a525b5567a7b84c3dda82f2db00394a47e4b90b09867c12141a0c729289ff80"`
[INFO] [stdout] 5a525b5567a7b84c3dda82f2db00394a47e4b90b09867c12141a0c729289ff80
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/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/sscdotopen/puppies:/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] 08cd5b23afa651d36b6735e8dd21091b6f69e5c74b62527ff9ca0309830a01b7
[INFO] running `"docker" "start" "-a" "08cd5b23afa651d36b6735e8dd21091b6f69e5c74b62527ff9ca0309830a01b7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/puppies-b3ff7c6e199c3fad
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test llr::tests::topk ... ok
[INFO] [stdout] test llr::tests::llr ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/main-98be6c9c6ef1aaaf
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests puppies
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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" "08cd5b23afa651d36b6735e8dd21091b6f69e5c74b62527ff9ca0309830a01b7"`
[INFO] running `"docker" "rm" "-f" "08cd5b23afa651d36b6735e8dd21091b6f69e5c74b62527ff9ca0309830a01b7"`
[INFO] [stdout] 08cd5b23afa651d36b6735e8dd21091b6f69e5c74b62527ff9ca0309830a01b7