[INFO] updating cached repository stepchowfun/tagref
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/stepchowfun/tagref
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/stepchowfun/tagref" "work/ex/clippy-test-run/sources/stable/gh/stepchowfun/tagref"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/stepchowfun/tagref'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/stepchowfun/tagref" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/stepchowfun/tagref"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/stepchowfun/tagref'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 07351e39f9fd9d1ef38d89c926ced4de9f2f0a49
[INFO] sha for GitHub repo stepchowfun/tagref: 07351e39f9fd9d1ef38d89c926ced4de9f2f0a49
[INFO] validating manifest of stepchowfun/tagref on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of stepchowfun/tagref on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing stepchowfun/tagref
[INFO] finished frobbing stepchowfun/tagref
[INFO] frobbed toml for stepchowfun/tagref written to work/ex/clippy-test-run/sources/stable/gh/stepchowfun/tagref/Cargo.toml
[INFO] started frobbing stepchowfun/tagref
[INFO] finished frobbing stepchowfun/tagref
[INFO] frobbed toml for stepchowfun/tagref written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/stepchowfun/tagref/Cargo.toml
[INFO] crate stepchowfun/tagref has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting stepchowfun/tagref against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/stepchowfun/tagref:/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=forbid" "-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" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f7443c90a0abdbfb54dbde30f25287cf32dbf876888955793282ba6bb9cd9d6e
[INFO] running `"docker" "start" "-a" "f7443c90a0abdbfb54dbde30f25287cf32dbf876888955793282ba6bb9cd9d6e"`
[INFO] [stderr]     Checking crossbeam v0.3.2
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking regex v1.0.0
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking clap v2.31.2
[INFO] [stderr]     Checking globset v0.4.0
[INFO] [stderr]     Checking ignore v0.4.2
[INFO] [stderr]     Checking tagref v0.0.5 (/opt/crater/workdir)
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/citations.rs:108:33
[INFO] [stderr]     |
[INFO] [stderr] 108 |         assert!(error.contains(&format!("{}", references[1].label)));
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `references[1].label.to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.75s
[INFO] running `"docker" "inspect" "f7443c90a0abdbfb54dbde30f25287cf32dbf876888955793282ba6bb9cd9d6e"`
[INFO] running `"docker" "rm" "-f" "f7443c90a0abdbfb54dbde30f25287cf32dbf876888955793282ba6bb9cd9d6e"`
[INFO] [stdout] f7443c90a0abdbfb54dbde30f25287cf32dbf876888955793282ba6bb9cd9d6e