[INFO] fetching crate wping 0.3.0... [INFO] checking wping-0.3.0 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248 [INFO] extracting crate wping 0.3.0 into /workspace/builds/worker-7/source [INFO] validating manifest of crates.io crate wping 0.3.0 on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate wping 0.3.0 [INFO] finished tweaking crates.io crate wping 0.3.0 [INFO] tweaked toml for crates.io crate wping 0.3.0 written to /workspace/builds/worker-7/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded pnet_base v0.28.0 [INFO] [stderr] Downloaded bitflags v0.5.0 [INFO] [stderr] Downloaded pnet_macros_support v0.28.0 [INFO] [stderr] Downloaded syntex v0.42.2 [INFO] [stderr] Downloaded argparse v0.2.2 [INFO] [stderr] Downloaded pnet_macros v0.15.0 [INFO] [stderr] Downloaded syntex_errors v0.42.0 [INFO] [stderr] Downloaded syntex_pos v0.42.0 [INFO] [stderr] Downloaded syntex_syntax v0.42.0 [INFO] [stderr] Downloaded unicode-xid v0.0.3 [INFO] [stderr] Downloaded pnet_macros_support v0.1.1 [INFO] [stderr] Downloaded resolve v0.1.2 [INFO] [stderr] Downloaded pnet v0.16.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 7ee5c1a001d4e58c556a82a4267ad777a4ba996e3737404ec64ea5b453ef9a4b [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "7ee5c1a001d4e58c556a82a4267ad777a4ba996e3737404ec64ea5b453ef9a4b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "7ee5c1a001d4e58c556a82a4267ad777a4ba996e3737404ec64ea5b453ef9a4b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7ee5c1a001d4e58c556a82a4267ad777a4ba996e3737404ec64ea5b453ef9a4b", kill_on_drop: false }` [INFO] [stdout] 7ee5c1a001d4e58c556a82a4267ad777a4ba996e3737404ec64ea5b453ef9a4b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] e94e3dbc29970223de363605925c90d5beeab1b6aed5665c9bdc571dbc40cb26 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "e94e3dbc29970223de363605925c90d5beeab1b6aed5665c9bdc571dbc40cb26", kill_on_drop: false }` [INFO] [stderr] Compiling autocfg v1.0.1 [INFO] [stderr] Compiling ucd-util v0.1.8 [INFO] [stderr] Compiling utf8-ranges v1.0.4 [INFO] [stderr] Checking unicode-xid v0.0.3 [INFO] [stderr] Checking bitflags v0.5.0 [INFO] [stderr] Checking pnet_base v0.28.0 [INFO] [stderr] Checking pnet_macros_support v0.1.1 [INFO] [stderr] Checking argparse v0.2.2 [INFO] [stderr] Compiling thread_local v0.3.6 [INFO] [stderr] Checking syntex_pos v0.42.0 [INFO] [stderr] Compiling ws2_32-sys v0.2.1 [INFO] [stderr] Checking tinyvec v1.3.1 [INFO] [stderr] Checking log v0.4.14 [INFO] [stderr] Compiling memchr v2.4.0 [INFO] [stderr] Compiling log v0.3.9 [INFO] [stderr] Checking rand v0.4.6 [INFO] [stderr] Checking aho-corasick v0.6.10 [INFO] [stderr] Checking pnet_macros_support v0.28.0 [INFO] [stderr] Compiling regex-syntax v0.5.6 [INFO] [stderr] Compiling syntex_errors v0.42.0 [INFO] [stderr] Compiling num-traits v0.2.14 [INFO] [stderr] Compiling num-integer v0.1.44 [INFO] [stderr] Compiling num-iter v0.1.42 [INFO] [stderr] Checking regex v0.2.11 [INFO] [stderr] Checking syntex_syntax v0.42.0 [INFO] [stderr] Checking rand v0.3.23 [INFO] [stderr] Checking unicode-normalization v0.1.19 [INFO] [stderr] Checking num-complex v0.1.43 [INFO] [stderr] Checking idna v0.1.5 [INFO] [stderr] Checking num-bigint v0.1.44 [INFO] [stderr] Checking resolve v0.1.2 [INFO] [stderr] Checking num-rational v0.1.42 [INFO] [stderr] Checking num v0.1.42 [INFO] [stderr] Checking chrono v0.3.0 [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/rustwide/workdir) [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/columnar.rs:67:50 [INFO] [stdout] | [INFO] [stdout] 67 | pub fn format(&'a self, values : Vec>) -> String { [INFO] [stdout] | ^^^^^^^ help: use `dyn`: `dyn Display` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/columnar.rs:72:50 [INFO] [stdout] | [INFO] [stdout] 72 | (col, v) : (&'a Column, Option<&Display>)| { [INFO] [stdout] | ^^^^^^^ help: use `dyn`: `dyn Display` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:155:77 [INFO] [stdout] | [INFO] [stdout] 155 | fn send_ping (mut tx : TransportSender, dst : Ipv4Addr, len : usize) -> Box ()> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(u16) -> ()` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:404:30 [INFO] [stdout] | [INFO] [stdout] 404 | fn do_probe(probe : &mut Box ()>, stats: &mut Stats, [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(u16) -> ()` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/main.rs:437:25 [INFO] [stdout] | [INFO] [stdout] 437 | let addrs = try!(resolve_host(&s).map_err(|e| String::from(e.description()))); [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:500:60 [INFO] [stdout] | [INFO] [stdout] 500 | fn to_display(v : Option<&T>) -> Option<&fmt::Display> { [INFO] [stdout] | ^^^^^^^^^^^^ help: use `dyn`: `dyn fmt::Display` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:501:22 [INFO] [stdout] | [INFO] [stdout] 501 | v.map (|v| v as &fmt::Display) [INFO] [stdout] | ^^^^^^^^^^^^ help: use `dyn`: `dyn fmt::Display` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:508:39 [INFO] [stdout] | [INFO] [stdout] 508 | let seq = resp.map(|r| &r.seq as &fmt::Display); [INFO] [stdout] | ^^^^^^^^^^^^ help: use `dyn`: `dyn fmt::Display` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:509:46 [INFO] [stdout] | [INFO] [stdout] 509 | let nbytes = resp.map (|r| &r.nbytes as &fmt::Display); [INFO] [stdout] | ^^^^^^^^^^^^ help: use `dyn`: `dyn fmt::Display` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:510:39 [INFO] [stdout] | [INFO] [stdout] 510 | let ttl = resp.map(|r| &r.ttl as &fmt::Display); [INFO] [stdout] | ^^^^^^^^^^^^ help: use `dyn`: `dyn fmt::Display` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/columnar.rs:67:50 [INFO] [stdout] | [INFO] [stdout] 67 | pub fn format(&'a self, values : Vec>) -> String { [INFO] [stdout] | ^^^^^^^ help: use `dyn`: `dyn Display` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/columnar.rs:72:50 [INFO] [stdout] | [INFO] [stdout] 72 | (col, v) : (&'a Column, Option<&Display>)| { [INFO] [stdout] | ^^^^^^^ help: use `dyn`: `dyn Display` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:155:77 [INFO] [stdout] | [INFO] [stdout] 155 | fn send_ping (mut tx : TransportSender, dst : Ipv4Addr, len : usize) -> Box ()> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(u16) -> ()` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:404:30 [INFO] [stdout] | [INFO] [stdout] 404 | fn do_probe(probe : &mut Box ()>, stats: &mut Stats, [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(u16) -> ()` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/main.rs:437:25 [INFO] [stdout] | [INFO] [stdout] 437 | let addrs = try!(resolve_host(&s).map_err(|e| String::from(e.description()))); [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:500:60 [INFO] [stdout] | [INFO] [stdout] 500 | fn to_display(v : Option<&T>) -> Option<&fmt::Display> { [INFO] [stdout] | ^^^^^^^^^^^^ help: use `dyn`: `dyn fmt::Display` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:501:22 [INFO] [stdout] | [INFO] [stdout] 501 | v.map (|v| v as &fmt::Display) [INFO] [stdout] | ^^^^^^^^^^^^ help: use `dyn`: `dyn fmt::Display` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:508:39 [INFO] [stdout] | [INFO] [stdout] 508 | let seq = resp.map(|r| &r.seq as &fmt::Display); [INFO] [stdout] | ^^^^^^^^^^^^ help: use `dyn`: `dyn fmt::Display` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:509:46 [INFO] [stdout] | [INFO] [stdout] 509 | let nbytes = resp.map (|r| &r.nbytes as &fmt::Display); [INFO] [stdout] | ^^^^^^^^^^^^ help: use `dyn`: `dyn fmt::Display` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:510:39 [INFO] [stdout] | [INFO] [stdout] 510 | let ttl = resp.map(|r| &r.ttl as &fmt::Display); [INFO] [stdout] | ^^^^^^^^^^^^ help: use `dyn`: `dyn fmt::Display` [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see issue #80165 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> src/main.rs:437:74 [INFO] [stdout] | [INFO] [stdout] 437 | let addrs = try!(resolve_host(&s).map_err(|e| String::from(e.description()))); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> src/main.rs:437:74 [INFO] [stdout] | [INFO] [stdout] 437 | let addrs = try!(resolve_host(&s).map_err(|e| String::from(e.description()))); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:115:9 [INFO] [stdout] | [INFO] [stdout] 115 | let mut ipv4_payload = ipv4.payload_mut(); [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:115:9 [INFO] [stdout] | [INFO] [stdout] 115 | let mut ipv4_payload = ipv4.payload_mut(); [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021. [INFO] [stdout] --> src/main.rs:339:44 [INFO] [stdout] | [INFO] [stdout] 339 | for (i, unit) in ["s", "ms", "us"].into_iter().enumerate() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(array_into_iter)]` on by default [INFO] [stdout] = warning: this changes meaning in Rust 2021 [INFO] [stdout] = note: for more information, see issue #66145 [INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity [INFO] [stdout] | [INFO] [stdout] 339 | for (i, unit) in ["s", "ms", "us"].iter().enumerate() { [INFO] [stdout] | ^^^^ [INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value [INFO] [stdout] | [INFO] [stdout] 339 | for (i, unit) in IntoIterator::into_iter(["s", "ms", "us"]).enumerate() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021. [INFO] [stdout] --> src/main.rs:339:44 [INFO] [stdout] | [INFO] [stdout] 339 | for (i, unit) in ["s", "ms", "us"].into_iter().enumerate() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(array_into_iter)]` on by default [INFO] [stdout] = warning: this changes meaning in Rust 2021 [INFO] [stdout] = note: for more information, see issue #66145 [INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity [INFO] [stdout] | [INFO] [stdout] 339 | for (i, unit) in ["s", "ms", "us"].iter().enumerate() { [INFO] [stdout] | ^^^^ [INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value [INFO] [stdout] | [INFO] [stdout] 339 | for (i, unit) in IntoIterator::into_iter(["s", "ms", "us"]).enumerate() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 13 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 13 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1m 15s [INFO] running `Command { std: "docker" "inspect" "e94e3dbc29970223de363605925c90d5beeab1b6aed5665c9bdc571dbc40cb26", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e94e3dbc29970223de363605925c90d5beeab1b6aed5665c9bdc571dbc40cb26", kill_on_drop: false }` [INFO] [stdout] e94e3dbc29970223de363605925c90d5beeab1b6aed5665c9bdc571dbc40cb26