[INFO] updating cached repository Shuternay/factorization_machine
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Shuternay/factorization_machine
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Shuternay/factorization_machine" "work/ex/beta-1.37-6/sources/1.36.0/gh/Shuternay/factorization_machine"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Shuternay/factorization_machine'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Shuternay/factorization_machine" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Shuternay/factorization_machine"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Shuternay/factorization_machine'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f935feb6948591d30df2136b16576348f5c69c9b
[INFO] sha for GitHub repo Shuternay/factorization_machine: f935feb6948591d30df2136b16576348f5c69c9b
[INFO] validating manifest of Shuternay/factorization_machine 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 Shuternay/factorization_machine 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 Shuternay/factorization_machine
[INFO] finished frobbing Shuternay/factorization_machine
[INFO] frobbed toml for Shuternay/factorization_machine written to work/ex/beta-1.37-6/sources/1.36.0/gh/Shuternay/factorization_machine/Cargo.toml
[INFO] started frobbing Shuternay/factorization_machine
[INFO] finished frobbing Shuternay/factorization_machine
[INFO] frobbed toml for Shuternay/factorization_machine written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Shuternay/factorization_machine/Cargo.toml
[INFO] crate Shuternay/factorization_machine 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 Shuternay/factorization_machine 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-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/Shuternay/factorization_machine:/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] dcf5f3500661e3f0695ea9f6a562577eda957b720aa8443eab7f0e7de772bf25
[INFO] running `"docker" "start" "-a" "dcf5f3500661e3f0695ea9f6a562577eda957b720aa8443eab7f0e7de772bf25"`
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling serde_json v1.0.17
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling csv-core v0.1.4
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling csv v1.0.0-beta.5
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling factorization_machine v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/model.rs:265:33
[INFO] [stderr]     |
[INFO] [stderr] 265 |                             let mut h = record.value * 
[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 18.35s
[INFO] running `"docker" "inspect" "dcf5f3500661e3f0695ea9f6a562577eda957b720aa8443eab7f0e7de772bf25"`
[INFO] running `"docker" "rm" "-f" "dcf5f3500661e3f0695ea9f6a562577eda957b720aa8443eab7f0e7de772bf25"`
[INFO] [stdout] dcf5f3500661e3f0695ea9f6a562577eda957b720aa8443eab7f0e7de772bf25
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/Shuternay/factorization_machine:/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] 2cedea360e0cc28c82d14a5da6fd2d4332ff56a39ee940ebed518fe1abb278da
[INFO] running `"docker" "start" "-a" "2cedea360e0cc28c82d14a5da6fd2d4332ff56a39ee940ebed518fe1abb278da"`
[INFO] [stderr]    Compiling factorization_machine v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/model.rs:265:33
[INFO] [stderr]     |
[INFO] [stderr] 265 |                             let mut h = record.value * 
[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 2.20s
[INFO] running `"docker" "inspect" "2cedea360e0cc28c82d14a5da6fd2d4332ff56a39ee940ebed518fe1abb278da"`
[INFO] running `"docker" "rm" "-f" "2cedea360e0cc28c82d14a5da6fd2d4332ff56a39ee940ebed518fe1abb278da"`
[INFO] [stdout] 2cedea360e0cc28c82d14a5da6fd2d4332ff56a39ee940ebed518fe1abb278da
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/Shuternay/factorization_machine:/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] d35794b74097ede1ef2877f9f17b9afa76936a85d98df943f80a6b3f2a2e9a60
[INFO] running `"docker" "start" "-a" "d35794b74097ede1ef2877f9f17b9afa76936a85d98df943f80a6b3f2a2e9a60"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/factorization_machine-9fb8a57d1d386fac
[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/factorization_machine-cca0b5a7b5030671
[INFO] [stderr]    Doc-tests factorization_machine
[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] [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" "d35794b74097ede1ef2877f9f17b9afa76936a85d98df943f80a6b3f2a2e9a60"`
[INFO] running `"docker" "rm" "-f" "d35794b74097ede1ef2877f9f17b9afa76936a85d98df943f80a6b3f2a2e9a60"`
[INFO] [stdout] d35794b74097ede1ef2877f9f17b9afa76936a85d98df943f80a6b3f2a2e9a60