[INFO] crate frontmatter 0.3.0 is already in cache
[INFO] extracting crate frontmatter 0.3.0 into work/ex/clippy-test-run/sources/stable/reg/frontmatter/0.3.0
[INFO] extracting crate frontmatter 0.3.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/frontmatter/0.3.0
[INFO] validating manifest of frontmatter-0.3.0 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 frontmatter-0.3.0 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 frontmatter-0.3.0
[INFO] finished frobbing frontmatter-0.3.0
[INFO] frobbed toml for frontmatter-0.3.0 written to work/ex/clippy-test-run/sources/stable/reg/frontmatter/0.3.0/Cargo.toml
[INFO] started frobbing frontmatter-0.3.0
[INFO] finished frobbing frontmatter-0.3.0
[INFO] frobbed toml for frontmatter-0.3.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/frontmatter/0.3.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 frontmatter-0.3.0 against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/frontmatter/0.3.0:/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 -Dclippy::into_iter_on_array" "-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] 514fce174cd5c7264d3a2f75601a99db21c8efe848de7ba92bc12c7f37faae18
[INFO] running `"docker" "start" "-a" "514fce174cd5c7264d3a2f75601a99db21c8efe848de7ba92bc12c7f37faae18"`
[INFO] [stderr]     Checking frontmatter v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]   --> src/lib.rs:8:5
[INFO] [stderr]    |
[INFO] [stderr] 8  | /     match text.starts_with("---\n") {
[INFO] [stderr] 9  | |         true => {
[INFO] [stderr] 10 | |             let slice_after_marker = &text[4..];
[INFO] [stderr] 11 | |             let fm_end = slice_after_marker.find("---\n");
[INFO] [stderr] ...  |
[INFO] [stderr] 19 | |         false => None
[INFO] [stderr] 20 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_bool)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]    |
[INFO] [stderr] 8  |     if text.starts_with("---\n") {
[INFO] [stderr] 9  |     let slice_after_marker = &text[4..];
[INFO] [stderr] 10 |     let fm_end = slice_after_marker.find("---\n");
[INFO] [stderr] 11 |     if fm_end.is_none() {
[INFO] [stderr] 12 |         return None
[INFO] [stderr] 13 |     };
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: this block may be rewritten with the `?` operator
[INFO] [stderr]   --> src/lib.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 | /             if fm_end.is_none() {
[INFO] [stderr] 13 | |                 return None
[INFO] [stderr] 14 | |             };
[INFO] [stderr]    | |_____________^ help: replace_it_with: `fm_end?;`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::question_mark)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#question_mark
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]   --> src/lib.rs:8:5
[INFO] [stderr]    |
[INFO] [stderr] 8  | /     match text.starts_with("---\n") {
[INFO] [stderr] 9  | |         true => {
[INFO] [stderr] 10 | |             let slice_after_marker = &text[4..];
[INFO] [stderr] 11 | |             let fm_end = slice_after_marker.find("---\n");
[INFO] [stderr] ...  |
[INFO] [stderr] 19 | |         false => None
[INFO] [stderr] 20 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_bool)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]    |
[INFO] [stderr] 8  |     if text.starts_with("---\n") {
[INFO] [stderr] 9  |     let slice_after_marker = &text[4..];
[INFO] [stderr] 10 |     let fm_end = slice_after_marker.find("---\n");
[INFO] [stderr] 11 |     if fm_end.is_none() {
[INFO] [stderr] 12 |         return None
[INFO] [stderr] 13 |     };
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: this block may be rewritten with the `?` operator
[INFO] [stderr]   --> src/lib.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 | /             if fm_end.is_none() {
[INFO] [stderr] 13 | |                 return None
[INFO] [stderr] 14 | |             };
[INFO] [stderr]    | |_____________^ help: replace_it_with: `fm_end?;`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::question_mark)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#question_mark
[INFO] [stderr] 
[INFO] [stderr] warning: this creates an owned instance just for comparison
[INFO] [stderr]   --> src/lib.rs:69:13
[INFO] [stderr]    |
[INFO] [stderr] 69 |     assert!(stripped_string.to_string() == test_string[31..].to_string());
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `stripped_string`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cmp_owned)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cmp_owned
[INFO] [stderr] 
[INFO] [stderr] warning: this creates an owned instance just for comparison
[INFO] [stderr]   --> src/lib.rs:69:44
[INFO] [stderr]    |
[INFO] [stderr] 69 |     assert!(stripped_string.to_string() == test_string[31..].to_string());
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `test_string[31..]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cmp_owned
[INFO] [stderr] 
[INFO] [stderr] warning: this creates an owned instance just for comparison
[INFO] [stderr]   --> src/lib.rs:95:13
[INFO] [stderr]    |
[INFO] [stderr] 95 |     assert!(stripped_string.to_string() == test_string);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `stripped_string`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cmp_owned
[INFO] [stderr] 
[INFO] [stderr] warning: this creates an owned instance just for comparison
[INFO] [stderr]    --> src/lib.rs:123:13
[INFO] [stderr]     |
[INFO] [stderr] 123 |     assert!(stripped_string.to_string() == test_string[8..]);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `stripped_string`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cmp_owned
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "514fce174cd5c7264d3a2f75601a99db21c8efe848de7ba92bc12c7f37faae18"`
[INFO] running `"docker" "rm" "-f" "514fce174cd5c7264d3a2f75601a99db21c8efe848de7ba92bc12c7f37faae18"`
[INFO] [stdout] 514fce174cd5c7264d3a2f75601a99db21c8efe848de7ba92bc12c7f37faae18