[INFO] updating cached repository Hand-of-Cthulhu/quiz_file_creator
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Hand-of-Cthulhu/quiz_file_creator
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Hand-of-Cthulhu/quiz_file_creator" "work/ex/clippy-test-run/sources/stable/gh/Hand-of-Cthulhu/quiz_file_creator"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/Hand-of-Cthulhu/quiz_file_creator'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Hand-of-Cthulhu/quiz_file_creator" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/Hand-of-Cthulhu/quiz_file_creator"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/Hand-of-Cthulhu/quiz_file_creator'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b157581b3c5d4314f1bf8afacd4951ba3f10cf78
[INFO] sha for GitHub repo Hand-of-Cthulhu/quiz_file_creator: b157581b3c5d4314f1bf8afacd4951ba3f10cf78
[INFO] validating manifest of Hand-of-Cthulhu/quiz_file_creator 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 Hand-of-Cthulhu/quiz_file_creator 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 Hand-of-Cthulhu/quiz_file_creator
[INFO] finished frobbing Hand-of-Cthulhu/quiz_file_creator
[INFO] frobbed toml for Hand-of-Cthulhu/quiz_file_creator written to work/ex/clippy-test-run/sources/stable/gh/Hand-of-Cthulhu/quiz_file_creator/Cargo.toml
[INFO] started frobbing Hand-of-Cthulhu/quiz_file_creator
[INFO] finished frobbing Hand-of-Cthulhu/quiz_file_creator
[INFO] frobbed toml for Hand-of-Cthulhu/quiz_file_creator written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/Hand-of-Cthulhu/quiz_file_creator/Cargo.toml
[INFO] crate Hand-of-Cthulhu/quiz_file_creator 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 Hand-of-Cthulhu/quiz_file_creator 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/Hand-of-Cthulhu/quiz_file_creator:/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] 5ff7e4932735c2d36dca2b49bd29eb38fe712ce42c5ac016665ccdb4306f8209
[INFO] running `"docker" "start" "-a" "5ff7e4932735c2d36dca2b49bd29eb38fe712ce42c5ac016665ccdb4306f8209"`
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking rustyline v1.0.0
[INFO] [stderr]     Checking quiz_file_creator v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `regex::Regex`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use regex::Regex;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `regex::Regex`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use regex::Regex;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/main.rs:11:52
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn print_default_screen(question_num: usize, data: &Vec<Vec<String>>, status: &str, prev_cmd: &str) {
[INFO] [stderr]    |                                                    ^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<String>]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/main.rs:35:42
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn print_list(question_num: usize, data: &Vec<Vec<String>>, status: &str, prev_cmd: &str) {
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<String>]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/main.rs:60:61
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn save_file<P: AsRef<std::path::Path>>(file_path: P, data: &Vec<Vec<String>>) {
[INFO] [stderr]    |                                                             ^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<String>]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fs::copy(&file_path, file_path.as_ref().to_str().unwrap().to_owned() + ".bak");//.expect("File backup failed");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/main.rs:71:55
[INFO] [stderr]    |
[INFO] [stderr] 71 |     let quiz_data_file_path = std::env::args().nth(1).unwrap_or("QuizData.dat".to_owned());
[INFO] [stderr]    |                                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| "QuizData.dat".to_owned())`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/main.rs:73:57
[INFO] [stderr]    |
[INFO] [stderr] 73 |     let data = fs::read_to_string(&quiz_data_file_path).unwrap_or("1+1\n5\n9\n1337\n2".to_owned())
[INFO] [stderr]    |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|_| "1+1\n5\n9\n1337\n2".to_owned())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/main.rs:159:30
[INFO] [stderr]     |
[INFO] [stderr] 159 |                     status = format!("Can't remove last question");
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Can't remove last question".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] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/main.rs:11:52
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn print_default_screen(question_num: usize, data: &Vec<Vec<String>>, status: &str, prev_cmd: &str) {
[INFO] [stderr]    |                                                    ^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<String>]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/main.rs:35:42
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn print_list(question_num: usize, data: &Vec<Vec<String>>, status: &str, prev_cmd: &str) {
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<String>]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/main.rs:60:61
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn save_file<P: AsRef<std::path::Path>>(file_path: P, data: &Vec<Vec<String>>) {
[INFO] [stderr]    |                                                             ^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<String>]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fs::copy(&file_path, file_path.as_ref().to_str().unwrap().to_owned() + ".bak");//.expect("File backup failed");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/main.rs:71:55
[INFO] [stderr]    |
[INFO] [stderr] 71 |     let quiz_data_file_path = std::env::args().nth(1).unwrap_or("QuizData.dat".to_owned());
[INFO] [stderr]    |                                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| "QuizData.dat".to_owned())`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/main.rs:73:57
[INFO] [stderr]    |
[INFO] [stderr] 73 |     let data = fs::read_to_string(&quiz_data_file_path).unwrap_or("1+1\n5\n9\n1337\n2".to_owned())
[INFO] [stderr]    |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|_| "1+1\n5\n9\n1337\n2".to_owned())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/main.rs:159:30
[INFO] [stderr]     |
[INFO] [stderr] 159 |                     status = format!("Can't remove last question");
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Can't remove last question".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] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.63s
[INFO] running `"docker" "inspect" "5ff7e4932735c2d36dca2b49bd29eb38fe712ce42c5ac016665ccdb4306f8209"`
[INFO] running `"docker" "rm" "-f" "5ff7e4932735c2d36dca2b49bd29eb38fe712ce42c5ac016665ccdb4306f8209"`
[INFO] [stdout] 5ff7e4932735c2d36dca2b49bd29eb38fe712ce42c5ac016665ccdb4306f8209