[INFO] cloning repository https://github.com/tomasz-klak/layout [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tomasz-klak/layout" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomasz-klak%2Flayout", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomasz-klak%2Flayout'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] bdf8227613c37edca51321b6411e9b25b1723e6a [INFO] checking tomasz-klak/layout against try#654bc80249a2b2ba8bd16392b5829d87ed96c92d for pr-136458 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomasz-klak%2Flayout" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/tomasz-klak/layout on toolchain 654bc80249a2b2ba8bd16392b5829d87ed96c92d [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+654bc80249a2b2ba8bd16392b5829d87ed96c92d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/tomasz-klak/layout [INFO] finished tweaking git repo https://github.com/tomasz-klak/layout [INFO] tweaked toml for git repo https://github.com/tomasz-klak/layout written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/tomasz-klak/layout already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+654bc80249a2b2ba8bd16392b5829d87ed96c92d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+654bc80249a2b2ba8bd16392b5829d87ed96c92d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 5977ea1694fbe4f14162f578f5fa597346a58eb9e0b2f53633c26e5d5b24c20e [INFO] running `Command { std: "docker" "start" "-a" "5977ea1694fbe4f14162f578f5fa597346a58eb9e0b2f53633c26e5d5b24c20e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "5977ea1694fbe4f14162f578f5fa597346a58eb9e0b2f53633c26e5d5b24c20e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5977ea1694fbe4f14162f578f5fa597346a58eb9e0b2f53633c26e5d5b24c20e", kill_on_drop: false }` [INFO] [stdout] 5977ea1694fbe4f14162f578f5fa597346a58eb9e0b2f53633c26e5d5b24c20e [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+654bc80249a2b2ba8bd16392b5829d87ed96c92d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b3a7d95a02d95175e43bf3b98d3ded4c8dfa3f0bd1756cecedb889b94e0edc49 [INFO] running `Command { std: "docker" "start" "-a" "b3a7d95a02d95175e43bf3b98d3ded4c8dfa3f0bd1756cecedb889b94e0edc49", kill_on_drop: false }` [INFO] [stderr] Compiling autocfg v1.1.0 [INFO] [stderr] Checking smallvec v1.8.0 [INFO] [stderr] Compiling memoffset v0.6.5 [INFO] [stderr] Checking layout v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::mem::size_of` [INFO] [stdout] --> src/simple.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::mem::size_of; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::mem::size_of` [INFO] [stdout] --> src/simple_structs.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::mem::size_of; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `memoffset::offset_of` [INFO] [stdout] --> src/structs.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use memoffset::offset_of; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `align_of` and `size_of` [INFO] [stdout] --> src/structs.rs:2:16 [INFO] [stdout] | [INFO] [stdout] 2 | use std::mem::{align_of, size_of}; [INFO] [stdout] | ^^^^^^^^ ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::mem::size_of` [INFO] [stdout] --> src/pointers.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::mem::size_of; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::rc::Rc` [INFO] [stdout] --> src/pointers.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::rc::Rc; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::sync::Arc` [INFO] [stdout] --> src/pointers.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::sync::Arc; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::mem::size_of` [INFO] [stdout] --> src/sequences.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::mem::size_of; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `smallvec::SmallVec` [INFO] [stdout] --> src/sequences.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use smallvec::SmallVec; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `align_of` and `size_of` [INFO] [stdout] --> src/enums.rs:1:16 [INFO] [stdout] | [INFO] [stdout] 1 | use std::mem::{align_of, size_of}; [INFO] [stdout] | ^^^^^^^^ ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::marker::PhantomData` [INFO] [stdout] --> src/unit.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::marker::PhantomData; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `align_of` and `size_of` [INFO] [stdout] --> src/unit.rs:2:16 [INFO] [stdout] | [INFO] [stdout] 2 | use std::mem::{align_of, size_of}; [INFO] [stdout] | ^^^^^^^^ ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `S` is never constructed [INFO] [stdout] --> src/simple_structs.rs:3:8 [INFO] [stdout] | [INFO] [stdout] 3 | struct S(T); [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `U8_and_U64` should have an upper camel case name [INFO] [stdout] --> src/structs.rs:6:12 [INFO] [stdout] | [INFO] [stdout] 6 | struct U8_and_U64 { [INFO] [stdout] | ^^^^^^^^^^ help: convert the identifier to upper camel case: `U8AndU64` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `U64_and_U8` should have an upper camel case name [INFO] [stdout] --> src/structs.rs:10:12 [INFO] [stdout] | [INFO] [stdout] 10 | struct U64_and_U8 { [INFO] [stdout] | ^^^^^^^^^^ help: convert the identifier to upper camel case: `U64AndU8` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `U8_U8_U8` should have an upper camel case name [INFO] [stdout] --> src/structs.rs:14:12 [INFO] [stdout] | [INFO] [stdout] 14 | struct U8_U8_U8(u8, u8, u8); [INFO] [stdout] | ^^^^^^^^ help: convert the identifier to upper camel case: `U8U8U8` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `U8_and_U64` should have an upper camel case name [INFO] [stdout] --> src/structs.rs:33:12 [INFO] [stdout] | [INFO] [stdout] 33 | struct U8_and_U64 { [INFO] [stdout] | ^^^^^^^^^^ help: convert the identifier to upper camel case: `U8AndU64` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `U64_and_U8` should have an upper camel case name [INFO] [stdout] --> src/structs.rs:38:12 [INFO] [stdout] | [INFO] [stdout] 38 | struct U64_and_U8 { [INFO] [stdout] | ^^^^^^^^^^ help: convert the identifier to upper camel case: `U64AndU8` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `U8_U8_U8` should have an upper camel case name [INFO] [stdout] --> src/structs.rs:43:12 [INFO] [stdout] | [INFO] [stdout] 43 | struct U8_U8_U8(u8, u8, u8); [INFO] [stdout] | ^^^^^^^^ help: convert the identifier to upper camel case: `U8U8U8` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary trailing semicolon [INFO] [stdout] --> src/pointers.rs:136:20 [INFO] [stdout] | [INFO] [stdout] 136 | trait Marker {}; [INFO] [stdout] | ^ help: remove this semicolon [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(redundant_semicolons)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `U64_and_U64` should have an upper camel case name [INFO] [stdout] --> src/enums.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | U64_and_U64(u64, u64), [INFO] [stdout] | ^^^^^^^^^^^ help: convert the identifier to upper camel case: `U64AndU64` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `U32_and_U64` should have an upper camel case name [INFO] [stdout] --> src/enums.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 18 | U32_and_U64(u32, u64), [INFO] [stdout] | ^^^^^^^^^^^ help: convert the identifier to upper camel case: `U32AndU64` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `U32_and_U64` should have an upper camel case name [INFO] [stdout] --> src/enums.rs:32:9 [INFO] [stdout] | [INFO] [stdout] 32 | U32_and_U64(Inner), [INFO] [stdout] | ^^^^^^^^^^^ help: convert the identifier to upper camel case: `U32AndU64` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `U32_and_U64` should have an upper camel case name [INFO] [stdout] --> src/enums.rs:57:9 [INFO] [stdout] | [INFO] [stdout] 57 | U32_and_U64(Inner), [INFO] [stdout] | ^^^^^^^^^^^ help: convert the identifier to upper camel case: `U32AndU64` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `U32_and_U64` should have an upper camel case name [INFO] [stdout] --> src/enums.rs:69:9 [INFO] [stdout] | [INFO] [stdout] 69 | U32_and_U64(NonZeroU64, u64), [INFO] [stdout] | ^^^^^^^^^^^ help: convert the identifier to upper camel case: `U32AndU64` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `U32_and_U64` should have an upper camel case name [INFO] [stdout] --> src/enums.rs:82:9 [INFO] [stdout] | [INFO] [stdout] 82 | U32_and_U64(NonZeroU64, u64), [INFO] [stdout] | ^^^^^^^^^^^ help: convert the identifier to upper camel case: `U32AndU64` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `U32_and_U64` should have an upper camel case name [INFO] [stdout] --> src/enums.rs:91:9 [INFO] [stdout] | [INFO] [stdout] 91 | U32_and_U64(u32, u64), [INFO] [stdout] | ^^^^^^^^^^^ help: convert the identifier to upper camel case: `U32AndU64` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `0`, `1`, and `2` are never read [INFO] [stdout] --> src/structs.rs:14:21 [INFO] [stdout] | [INFO] [stdout] 14 | struct U8_U8_U8(u8, u8, u8); [INFO] [stdout] | -------- ^^ ^^ ^^ [INFO] [stdout] | | [INFO] [stdout] | fields in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing these fields [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `small` and `big` are never read [INFO] [stdout] --> src/structs.rs:34:9 [INFO] [stdout] | [INFO] [stdout] 33 | struct U8_and_U64 { [INFO] [stdout] | ---------- fields in this struct [INFO] [stdout] 34 | small: u8, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 35 | big: u64, [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `big` and `small` are never read [INFO] [stdout] --> src/structs.rs:39:9 [INFO] [stdout] | [INFO] [stdout] 38 | struct U64_and_U8 { [INFO] [stdout] | ---------- fields in this struct [INFO] [stdout] 39 | big: u64, [INFO] [stdout] | ^^^ [INFO] [stdout] 40 | small: u8, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `0`, `1`, and `2` are never read [INFO] [stdout] --> src/structs.rs:43:21 [INFO] [stdout] | [INFO] [stdout] 43 | struct U8_U8_U8(u8, u8, u8); [INFO] [stdout] | -------- ^^ ^^ ^^ [INFO] [stdout] | | [INFO] [stdout] | fields in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing these fields [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `None` and `U64_and_U64` are never constructed [INFO] [stdout] --> src/enums.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 5 | enum E { [INFO] [stdout] | - variants in this enum [INFO] [stdout] 6 | None, [INFO] [stdout] | ^^^^ [INFO] [stdout] 7 | U64_and_U64(u64, u64), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `None` and `U32_and_U64` are never constructed [INFO] [stdout] --> src/enums.rs:17:9 [INFO] [stdout] | [INFO] [stdout] 16 | enum E { [INFO] [stdout] | - variants in this enum [INFO] [stdout] 17 | None, [INFO] [stdout] | ^^^^ [INFO] [stdout] 18 | U32_and_U64(u32, u64), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `0` and `1` are never read [INFO] [stdout] --> src/enums.rs:27:18 [INFO] [stdout] | [INFO] [stdout] 27 | struct Inner(u32, u64); [INFO] [stdout] | ----- ^^^ ^^^ [INFO] [stdout] | | [INFO] [stdout] | fields in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing these fields [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `None` and `U32_and_U64` are never constructed [INFO] [stdout] --> src/enums.rs:31:9 [INFO] [stdout] | [INFO] [stdout] 30 | enum E { [INFO] [stdout] | - variants in this enum [INFO] [stdout] 31 | None, [INFO] [stdout] | ^^^^ [INFO] [stdout] 32 | U32_and_U64(Inner), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `0` and `1` are never read [INFO] [stdout] --> src/enums.rs:52:18 [INFO] [stdout] | [INFO] [stdout] 52 | struct Inner(u32, u64); [INFO] [stdout] | ----- ^^^ ^^^ [INFO] [stdout] | | [INFO] [stdout] | fields in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing these fields [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `None` and `U32_and_U64` are never constructed [INFO] [stdout] --> src/enums.rs:56:9 [INFO] [stdout] | [INFO] [stdout] 55 | enum E { [INFO] [stdout] | - variants in this enum [INFO] [stdout] 56 | None, [INFO] [stdout] | ^^^^ [INFO] [stdout] 57 | U32_and_U64(Inner), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `None` and `U32_and_U64` are never constructed [INFO] [stdout] --> src/enums.rs:68:9 [INFO] [stdout] | [INFO] [stdout] 67 | enum E { [INFO] [stdout] | - variants in this enum [INFO] [stdout] 68 | None, [INFO] [stdout] | ^^^^ [INFO] [stdout] 69 | U32_and_U64(NonZeroU64, u64), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `A`, `B`, and `U32_and_U64` are never constructed [INFO] [stdout] --> src/enums.rs:80:9 [INFO] [stdout] | [INFO] [stdout] 79 | enum E { [INFO] [stdout] | - variants in this enum [INFO] [stdout] 80 | A, [INFO] [stdout] | ^ [INFO] [stdout] 81 | B, [INFO] [stdout] | ^ [INFO] [stdout] 82 | U32_and_U64(NonZeroU64, u64), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `A`, `B`, and `U32_and_U64` are never constructed [INFO] [stdout] --> src/enums.rs:89:9 [INFO] [stdout] | [INFO] [stdout] 88 | enum E2 { [INFO] [stdout] | -- variants in this enum [INFO] [stdout] 89 | A, [INFO] [stdout] | ^ [INFO] [stdout] 90 | B, [INFO] [stdout] | ^ [INFO] [stdout] 91 | U32_and_U64(u32, u64), [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/unit.rs:22:15 [INFO] [stdout] | [INFO] [stdout] 22 | struct S2(u64, (), PhantomData, (), PhantomData); [INFO] [stdout] | -- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 22 | struct S2((), (), PhantomData, (), PhantomData); [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/unit.rs:46:15 [INFO] [stdout] | [INFO] [stdout] 46 | struct S2(u64, (), PhantomData, (), PhantomData); [INFO] [stdout] | -- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 46 | struct S2((), (), PhantomData, (), PhantomData); [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s [INFO] running `Command { std: "docker" "inspect" "b3a7d95a02d95175e43bf3b98d3ded4c8dfa3f0bd1756cecedb889b94e0edc49", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b3a7d95a02d95175e43bf3b98d3ded4c8dfa3f0bd1756cecedb889b94e0edc49", kill_on_drop: false }` [INFO] [stdout] b3a7d95a02d95175e43bf3b98d3ded4c8dfa3f0bd1756cecedb889b94e0edc49