[INFO] cloning repository https://github.com/leefordjudes/idiomatic-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/leefordjudes/idiomatic-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleefordjudes%2Fidiomatic-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleefordjudes%2Fidiomatic-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 55083151d36addb31bbf113238aeb841102d41bd
[INFO] checking leefordjudes/idiomatic-rust against master#b2728d5426bab1d8c39709768c7e22b7f66dde5d for pr-135852
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleefordjudes%2Fidiomatic-rust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leefordjudes/idiomatic-rust on toolchain b2728d5426bab1d8c39709768c7e22b7f66dde5d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b2728d5426bab1d8c39709768c7e22b7f66dde5d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/leefordjudes/idiomatic-rust
[INFO] finished tweaking git repo https://github.com/leefordjudes/idiomatic-rust
[INFO] tweaked toml for git repo https://github.com/leefordjudes/idiomatic-rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/leefordjudes/idiomatic-rust 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" "+b2728d5426bab1d8c39709768c7e22b7f66dde5d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded derive_builder_macro v0.11.1
[INFO] [stderr]   Downloaded derive_builder_core v0.11.1
[INFO] [stderr]   Downloaded derive_builder v0.11.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+b2728d5426bab1d8c39709768c7e22b7f66dde5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 224f6899195f4ae5e5505d784653a27ea6703a2d0b499f2f970fe779c3139cee
[INFO] running `Command { std: "docker" "start" "-a" "224f6899195f4ae5e5505d784653a27ea6703a2d0b499f2f970fe779c3139cee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "224f6899195f4ae5e5505d784653a27ea6703a2d0b499f2f970fe779c3139cee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "224f6899195f4ae5e5505d784653a27ea6703a2d0b499f2f970fe779c3139cee", kill_on_drop: false }`
[INFO] [stdout] 224f6899195f4ae5e5505d784653a27ea6703a2d0b499f2f970fe779c3139cee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+b2728d5426bab1d8c39709768c7e22b7f66dde5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7459841fcf390976d034bb8638bab0f7847182a294ae41959242b966b7dccaec
[INFO] running `Command { std: "docker" "start" "-a" "7459841fcf390976d034bb8638bab0f7847182a294ae41959242b966b7dccaec", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking idmr2-fun-args v0.1.0 (/opt/rustwide/workdir/idmr2-fun-args)
[INFO] [stderr]     Checking idmr5-avoiding-allocations v0.1.0 (/opt/rustwide/workdir/idmr5-avoiding-allocations)
[INFO] [stderr]     Checking idmr4-iterating-over-option v0.1.0 (/opt/rustwide/workdir/idmr4-iterating-over-option)
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> idmr2-fun-args/src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Cat {
[INFO] [stdout]   |        --- field in this struct
[INFO] [stdout] 7 |     name: String
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Cat` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> idmr2-fun-args/src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Dog {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] 18 |     name: String
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Dog` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> idmr2-fun-args/src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Cat {
[INFO] [stdout]   |        --- field in this struct
[INFO] [stdout] 7 |     name: String
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Cat` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> idmr2-fun-args/src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Dog {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] 18 |     name: String
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Dog` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling darling_core v0.12.4
[INFO] [stderr]    Compiling derive-new v0.5.9
[INFO] [stderr]    Compiling typed-builder v0.10.0
[INFO] [stderr]     Checking idmr1-constructor v0.1.0 (/opt/rustwide/workdir/idmr1-constructor)
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> idmr1-constructor/src/lib.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct User {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 14 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> idmr1-constructor/src/lib.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct User {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 14 |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `content`, `tags`, and `likes` are never read
[INFO] [stdout]   --> idmr1-constructor/src/lib.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub struct Post {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 54 |     content: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 55 |     tags: Vec<String>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 56 |     likes: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Post` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `content`, `tags`, and `likes` are never read
[INFO] [stdout]   --> idmr1-constructor/src/lib.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub struct Post {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 54 |     content: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 55 |     tags: Vec<String>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 56 |     likes: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Post` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `status`, `comments`, and `likes` are never read
[INFO] [stdout]   --> idmr1-constructor/src/lib.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct PostStatus {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 63 |     status: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 64 |     #[new(value="vec![\"no comments\".to_owned()]")]
[INFO] [stdout] 65 |     comments: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 66 |     #[new(default)]
[INFO] [stdout] 67 |     likes: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PostStatus` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `status`, `comments`, and `likes` are never read
[INFO] [stdout]   --> idmr1-constructor/src/lib.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct PostStatus {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 63 |     status: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 64 |     #[new(value="vec![\"no comments\".to_owned()]")]
[INFO] [stdout] 65 |     comments: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 66 |     #[new(default)]
[INFO] [stdout] 67 |     likes: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PostStatus` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling darling_macro v0.12.4
[INFO] [stderr]    Compiling darling v0.12.4
[INFO] [stderr]    Compiling derive_builder_core v0.11.1
[INFO] [stderr]    Compiling derive_builder_macro v0.11.1
[INFO] [stderr]     Checking derive_builder v0.11.1
[INFO] [stderr]     Checking idmr3-builder-pattern v0.1.0 (/opt/rustwide/workdir/idmr3-builder-pattern)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.88s
[INFO] running `Command { std: "docker" "inspect" "7459841fcf390976d034bb8638bab0f7847182a294ae41959242b966b7dccaec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7459841fcf390976d034bb8638bab0f7847182a294ae41959242b966b7dccaec", kill_on_drop: false }`
[INFO] [stdout] 7459841fcf390976d034bb8638bab0f7847182a294ae41959242b966b7dccaec