[INFO] crate wping 0.3.0 is already in cache
[INFO] extracting crate wping 0.3.0 into work/ex/clippy-test-run/sources/stable/reg/wping/0.3.0
[INFO] extracting crate wping 0.3.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/wping/0.3.0
[INFO] validating manifest of wping-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 wping-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 wping-0.3.0
[INFO] finished frobbing wping-0.3.0
[INFO] frobbed toml for wping-0.3.0 written to work/ex/clippy-test-run/sources/stable/reg/wping/0.3.0/Cargo.toml
[INFO] started frobbing wping-0.3.0
[INFO] finished frobbing wping-0.3.0
[INFO] frobbed toml for wping-0.3.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/wping/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 wping-0.3.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-3/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/wping/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" "-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] 5083b4440586024897229271255703de7243c44eb66a3f1f921ca0e904c2951e
[INFO] running `"docker" "start" "-a" "5083b4440586024897229271255703de7243c44eb66a3f1f921ca0e904c2951e"`
[INFO] [stderr]     Checking pnet_macros_support v0.1.1
[INFO] [stderr]    Compiling memchr v2.1.3
[INFO] [stderr]    Compiling syntex_errors v0.42.0
[INFO] [stderr]     Checking resolve v0.1.2
[INFO] [stderr]     Checking chrono v0.3.0
[INFO] [stderr]     Checking syntex_syntax v0.42.0
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking syntex v0.42.2
[INFO] [stderr]     Checking pnet_macros v0.15.0
[INFO] [stderr]    Compiling pnet v0.16.0
[INFO] [stderr]     Checking wping v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: lint name `match_bool` is deprecated and may not have an effect in the future. Also `cfg_attr(cargo-clippy)` won't be necessary anymore
[INFO] [stderr]  --> src/main.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![allow(match_bool)]
[INFO] [stderr]   |          ^^^^^^^^^^ help: change it to: `clippy::match_bool`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(renamed_and_removed_lints)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/columnar.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |             fmt_max_width : fmt_max_width,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `fmt_max_width`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/columnar.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |             breathing_whitespace : breathing_whitespace,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `breathing_whitespace`
[INFO] [stderr] warning: lint name `match_bool` is deprecated and may not have an effect in the future. Also `cfg_attr(cargo-clippy)` won't be necessary anymore
[INFO] [stderr]  --> src/main.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![allow(match_bool)]
[INFO] [stderr]   |          ^^^^^^^^^^ help: change it to: `clippy::match_bool`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(renamed_and_removed_lints)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/columnar.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |             fmt_max_width : fmt_max_width,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `fmt_max_width`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/main.rs:83:29
[INFO] [stderr]    |
[INFO] [stderr] 83 |                             addr : addr,
[INFO] [stderr]    |                             ^^^^^^^^^^^ help: replace it with: `addr`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/main.rs:206:13
[INFO] [stderr]     |
[INFO] [stderr] 206 |             seq : seq,
[INFO] [stderr]     |             ^^^^^^^^^ help: replace it with: `seq`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/main.rs:251:17
[INFO] [stderr]     |
[INFO] [stderr] 251 |                 n : n,
[INFO] [stderr]     |                 ^^^^^ help: replace it with: `n`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/columnar.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |             breathing_whitespace : breathing_whitespace,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `breathing_whitespace`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/main.rs:83:29
[INFO] [stderr]    |
[INFO] [stderr] 83 |                             addr : addr,
[INFO] [stderr]    |                             ^^^^^^^^^^^ help: replace it with: `addr`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/main.rs:206:13
[INFO] [stderr]     |
[INFO] [stderr] 206 |             seq : seq,
[INFO] [stderr]     |             ^^^^^^^^^ help: replace it with: `seq`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/main.rs:251:17
[INFO] [stderr]     |
[INFO] [stderr] 251 |                 n : n,
[INFO] [stderr]     |                 ^^^^^ help: replace it with: `n`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: lint name `match_bool` is deprecated and may not have an effect in the future. Also `cfg_attr(cargo-clippy)` won't be necessary anymore
[INFO] [stderr]  --> src/main.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![allow(match_bool)]
[INFO] [stderr]   |          ^^^^^^^^^^ help: change it to: `clippy::match_bool`
[INFO] [stderr] 
[INFO] [stderr] warning: lint name `match_bool` is deprecated and may not have an effect in the future. Also `cfg_attr(cargo-clippy)` won't be necessary anymore
[INFO] [stderr]  --> src/main.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![allow(match_bool)]
[INFO] [stderr]   |          ^^^^^^^^^^ help: change it to: `clippy::match_bool`
[INFO] [stderr] 
[INFO] [stderr] warning: digits grouped inconsistently by underscores
[INFO] [stderr]    --> src/main.rs:244:9
[INFO] [stderr]     |
[INFO] [stderr] 244 |         1000_000_000
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: consider: `1_000_000_000`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::inconsistent_digit_grouping)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inconsistent_digit_grouping
[INFO] [stderr] 
[INFO] [stderr] warning: digits grouped inconsistently by underscores
[INFO] [stderr]    --> src/main.rs:372:26
[INFO] [stderr]     |
[INFO] [stderr] 372 |         Ns(d.as_secs() * 1000_000_000 + (d.subsec_nanos() as u64))
[INFO] [stderr]     |                          ^^^^^^^^^^^^ help: consider: `1_000_000_000`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inconsistent_digit_grouping
[INFO] [stderr] 
[INFO] [stderr] warning: digits grouped inconsistently by underscores
[INFO] [stderr]    --> src/main.rs:613:17
[INFO] [stderr]     |
[INFO] [stderr] 613 |         None => 1000_000_000,
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: consider: `1_000_000_000`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inconsistent_digit_grouping
[INFO] [stderr] 
[INFO] [stderr] warning: digits grouped inconsistently by underscores
[INFO] [stderr]    --> src/main.rs:614:44
[INFO] [stderr]     |
[INFO] [stderr] 614 |         Some (s) => (parse_cli_float(&s) * 1000_000_000.0) as u64
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^ help: consider: `1_000_000_000.0`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inconsistent_digit_grouping
[INFO] [stderr] 
[INFO] [stderr] warning: digits grouped inconsistently by underscores
[INFO] [stderr]    --> src/main.rs:244:9
[INFO] [stderr]     |
[INFO] [stderr] 244 |         1000_000_000
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: consider: `1_000_000_000`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::inconsistent_digit_grouping)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inconsistent_digit_grouping
[INFO] [stderr] 
[INFO] [stderr] warning: digits grouped inconsistently by underscores
[INFO] [stderr]    --> src/main.rs:372:26
[INFO] [stderr]     |
[INFO] [stderr] 372 |         Ns(d.as_secs() * 1000_000_000 + (d.subsec_nanos() as u64))
[INFO] [stderr]     |                          ^^^^^^^^^^^^ help: consider: `1_000_000_000`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inconsistent_digit_grouping
[INFO] [stderr] 
[INFO] [stderr] warning: digits grouped inconsistently by underscores
[INFO] [stderr]    --> src/main.rs:613:17
[INFO] [stderr]     |
[INFO] [stderr] 613 |         None => 1000_000_000,
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: consider: `1_000_000_000`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inconsistent_digit_grouping
[INFO] [stderr] 
[INFO] [stderr] warning: digits grouped inconsistently by underscores
[INFO] [stderr]    --> src/main.rs:614:44
[INFO] [stderr]     |
[INFO] [stderr] 614 |         Some (s) => (parse_cli_float(&s) * 1000_000_000.0) as u64
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^ help: consider: `1_000_000_000.0`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inconsistent_digit_grouping
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 115 |     let mut ipv4_payload = ipv4.payload_mut();
[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] warning: this .into_iter() call is equivalent to .iter() and will not move the Vec
[INFO] [stderr]   --> src/columnar.rs:59:25
[INFO] [stderr]    |
[INFO] [stderr] 59 |         (&self.columns).into_iter().
[INFO] [stderr]    |                         ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::into_iter_on_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/main.rs:136:47
[INFO] [stderr]     |
[INFO] [stderr] 136 | fn populate_packet(pkt_buf : &mut [u8], dst : &Ipv4Addr, icmp_payload : &[u8]) {
[INFO] [stderr]     |                                               ^^^^^^^^^ help: consider passing by value instead: `Ipv4Addr`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] error: this .into_iter() call is equivalent to .iter() and will not move the array
[INFO] [stderr]    --> src/main.rs:339:44
[INFO] [stderr]     |
[INFO] [stderr] 339 |         for (i, unit) in ["s", "ms", "us"].into_iter().enumerate() {
[INFO] [stderr]     |                                            ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::into_iter_on_array)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_array
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 115 |     let mut ipv4_payload = ipv4.payload_mut();
[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] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:372:41
[INFO] [stderr]     |
[INFO] [stderr] 372 |         Ns(d.as_secs() * 1000_000_000 + (d.subsec_nanos() as u64))
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u64::from(d.subsec_nanos())`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]    --> src/main.rs:404:21
[INFO] [stderr]     |
[INFO] [stderr] 404 | fn do_probe(probe : &mut Box<FnMut(u16) -> ()>, stats: &mut Stats,
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut FnMut(u16) -> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::borrowed_box)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/main.rs:459:49
[INFO] [stderr]     |
[INFO] [stderr] 459 | fn print_resolved_addrs(dest : &str, selected : &Ipv4Addr, addrs: &[IpAddr]) {
[INFO] [stderr]     |                                                 ^^^^^^^^^ help: consider passing by value instead: `Ipv4Addr`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `wping`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the Vec
[INFO] [stderr]   --> src/columnar.rs:59:25
[INFO] [stderr]    |
[INFO] [stderr] 59 |         (&self.columns).into_iter().
[INFO] [stderr]    |                         ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::into_iter_on_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/main.rs:136:47
[INFO] [stderr]     |
[INFO] [stderr] 136 | fn populate_packet(pkt_buf : &mut [u8], dst : &Ipv4Addr, icmp_payload : &[u8]) {
[INFO] [stderr]     |                                               ^^^^^^^^^ help: consider passing by value instead: `Ipv4Addr`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] error: this .into_iter() call is equivalent to .iter() and will not move the array
[INFO] [stderr]    --> src/main.rs:339:44
[INFO] [stderr]     |
[INFO] [stderr] 339 |         for (i, unit) in ["s", "ms", "us"].into_iter().enumerate() {
[INFO] [stderr]     |                                            ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::into_iter_on_array)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_array
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:372:41
[INFO] [stderr]     |
[INFO] [stderr] 372 |         Ns(d.as_secs() * 1000_000_000 + (d.subsec_nanos() as u64))
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u64::from(d.subsec_nanos())`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]    --> src/main.rs:404:21
[INFO] [stderr]     |
[INFO] [stderr] 404 | fn do_probe(probe : &mut Box<FnMut(u16) -> ()>, stats: &mut Stats,
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&mut FnMut(u16) -> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::borrowed_box)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/main.rs:459:49
[INFO] [stderr]     |
[INFO] [stderr] 459 | fn print_resolved_addrs(dest : &str, selected : &Ipv4Addr, addrs: &[IpAddr]) {
[INFO] [stderr]     |                                                 ^^^^^^^^^ help: consider passing by value instead: `Ipv4Addr`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `wping`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "5083b4440586024897229271255703de7243c44eb66a3f1f921ca0e904c2951e"`
[INFO] running `"docker" "rm" "-f" "5083b4440586024897229271255703de7243c44eb66a3f1f921ca0e904c2951e"`
[INFO] [stdout] 5083b4440586024897229271255703de7243c44eb66a3f1f921ca0e904c2951e