[INFO] updating cached repository RockyTV/rust-nbr6023
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/RockyTV/rust-nbr6023
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/RockyTV/rust-nbr6023" "work/ex/beta-1.37-6/sources/1.36.0/gh/RockyTV/rust-nbr6023"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/RockyTV/rust-nbr6023'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/RockyTV/rust-nbr6023" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/RockyTV/rust-nbr6023"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/RockyTV/rust-nbr6023'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9125571df28e8e940e03fc2f1d05482af0937e36
[INFO] sha for GitHub repo RockyTV/rust-nbr6023: 9125571df28e8e940e03fc2f1d05482af0937e36
[INFO] validating manifest of RockyTV/rust-nbr6023 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 RockyTV/rust-nbr6023 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 RockyTV/rust-nbr6023
[INFO] finished frobbing RockyTV/rust-nbr6023
[INFO] frobbed toml for RockyTV/rust-nbr6023 written to work/ex/beta-1.37-6/sources/1.36.0/gh/RockyTV/rust-nbr6023/Cargo.toml
[INFO] started frobbing RockyTV/rust-nbr6023
[INFO] finished frobbing RockyTV/rust-nbr6023
[INFO] frobbed toml for RockyTV/rust-nbr6023 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/RockyTV/rust-nbr6023/Cargo.toml
[INFO] crate RockyTV/rust-nbr6023 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 RockyTV/rust-nbr6023 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/RockyTV/rust-nbr6023:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 0b9fb47086f2d9723355a915c156f6199d2076d4b52bf732090a9f0f8f3fd3c9
[INFO] running `"docker" "start" "-a" "0b9fb47086f2d9723355a915c156f6199d2076d4b52bf732090a9f0f8f3fd3c9"`
[INFO] [stderr]    Compiling rust-nbr6023 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `title`
[INFO] [stderr]   --> src/main.rs:10:37
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn generate_reference(author: &str, title: &str, year: &str, link: &str) -> String {
[INFO] [stderr]    |                                     ^^^^^ help: consider prefixing with an underscore: `_title`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `year`
[INFO] [stderr]   --> src/main.rs:10:50
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn generate_reference(author: &str, title: &str, year: &str, link: &str) -> String {
[INFO] [stderr]    |                                                  ^^^^ help: consider prefixing with an underscore: `_year`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `link`
[INFO] [stderr]   --> src/main.rs:10:62
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn generate_reference(author: &str, title: &str, year: &str, link: &str) -> String {
[INFO] [stderr]    |                                                              ^^^^ help: consider prefixing with an underscore: `_link`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut author_surname: &str = match author_parts.pop() {
[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 0.57s
[INFO] running `"docker" "inspect" "0b9fb47086f2d9723355a915c156f6199d2076d4b52bf732090a9f0f8f3fd3c9"`
[INFO] running `"docker" "rm" "-f" "0b9fb47086f2d9723355a915c156f6199d2076d4b52bf732090a9f0f8f3fd3c9"`
[INFO] [stdout] 0b9fb47086f2d9723355a915c156f6199d2076d4b52bf732090a9f0f8f3fd3c9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/RockyTV/rust-nbr6023:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] edc7b4d1cd953d42c6b70844aa3177428d0779910d0653832ecb8e64a7c7f998
[INFO] running `"docker" "start" "-a" "edc7b4d1cd953d42c6b70844aa3177428d0779910d0653832ecb8e64a7c7f998"`
[INFO] [stderr]    Compiling rust-nbr6023 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `title`
[INFO] [stderr]   --> src/main.rs:10:37
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn generate_reference(author: &str, title: &str, year: &str, link: &str) -> String {
[INFO] [stderr]    |                                     ^^^^^ help: consider prefixing with an underscore: `_title`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `year`
[INFO] [stderr]   --> src/main.rs:10:50
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn generate_reference(author: &str, title: &str, year: &str, link: &str) -> String {
[INFO] [stderr]    |                                                  ^^^^ help: consider prefixing with an underscore: `_year`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `link`
[INFO] [stderr]   --> src/main.rs:10:62
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn generate_reference(author: &str, title: &str, year: &str, link: &str) -> String {
[INFO] [stderr]    |                                                              ^^^^ help: consider prefixing with an underscore: `_link`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut author_surname: &str = match author_parts.pop() {
[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 0.40s
[INFO] running `"docker" "inspect" "edc7b4d1cd953d42c6b70844aa3177428d0779910d0653832ecb8e64a7c7f998"`
[INFO] running `"docker" "rm" "-f" "edc7b4d1cd953d42c6b70844aa3177428d0779910d0653832ecb8e64a7c7f998"`
[INFO] [stdout] edc7b4d1cd953d42c6b70844aa3177428d0779910d0653832ecb8e64a7c7f998
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/RockyTV/rust-nbr6023:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 20d836629eb371e8ed803d1afdfc70eed8f89a7cc262c4fa4ce2b77861f7d93a
[INFO] running `"docker" "start" "-a" "20d836629eb371e8ed803d1afdfc70eed8f89a7cc262c4fa4ce2b77861f7d93a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_nbr6023-61d4eff0951dab81
[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" "20d836629eb371e8ed803d1afdfc70eed8f89a7cc262c4fa4ce2b77861f7d93a"`
[INFO] running `"docker" "rm" "-f" "20d836629eb371e8ed803d1afdfc70eed8f89a7cc262c4fa4ce2b77861f7d93a"`
[INFO] [stdout] 20d836629eb371e8ed803d1afdfc70eed8f89a7cc262c4fa4ce2b77861f7d93a