[INFO] fetching crate variantly 0.4.0...
[INFO] checking variantly-0.4.0 against try#0edd13c68435d50367c79cef43ac2768d2ec4f3d for pr-129422
[INFO] extracting crate variantly 0.4.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate variantly 0.4.0 on toolchain 0edd13c68435d50367c79cef43ac2768d2ec4f3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate variantly 0.4.0
[INFO] finished tweaking crates.io crate variantly 0.4.0
[INFO] tweaked toml for crates.io crate variantly 0.4.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 23 packages to latest compatible versions
[INFO] [stderr]       Adding darling v0.11.0 (latest: v0.20.10)
[INFO] [stderr]       Adding darling_core v0.11.0 (latest: v0.20.10)
[INFO] [stderr]       Adding darling_macro v0.11.0 (latest: v0.20.10)
[INFO] [stderr]       Adding strsim v0.10.0 (latest: v0.11.1)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.77)
[INFO] [stderr]       Adding uuid v0.8.2 (latest: v1.10.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.2+wasi-0.2.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8decdbee869715b45f56ed4b64a3b290d092e775b8cf804f23e7028642e23068
[INFO] running `Command { std: "docker" "start" "-a" "8decdbee869715b45f56ed4b64a3b290d092e775b8cf804f23e7028642e23068", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8decdbee869715b45f56ed4b64a3b290d092e775b8cf804f23e7028642e23068", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8decdbee869715b45f56ed4b64a3b290d092e775b8cf804f23e7028642e23068", kill_on_drop: false }`
[INFO] [stdout] 8decdbee869715b45f56ed4b64a3b290d092e775b8cf804f23e7028642e23068
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+0edd13c68435d50367c79cef43ac2768d2ec4f3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77fb8afcebdde0369bf6200e31e1327aff0c51316308bc7ffea772d00076083b
[INFO] running `Command { std: "docker" "start" "-a" "77fb8afcebdde0369bf6200e31e1327aff0c51316308bc7ffea772d00076083b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]     Checking quote v1.0.37
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]     Checking regex v1.10.6
[INFO] [stderr]     Checking darling_core v0.11.0
[INFO] [stderr]     Checking Inflector v0.11.4
[INFO] [stderr]    Compiling darling_macro v0.11.0
[INFO] [stderr]     Checking darling v0.11.0
[INFO] [stderr]     Checking variantly v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `ident`, `attrs`, and `vis` are never read
[INFO] [stdout]   --> src/input.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct FieldParsed {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 21 |     pub ident: Option<Ident>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 22 |     pub ty: Type,
[INFO] [stdout] 23 |     pub attrs: Vec<Attribute>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 24 |     pub vis: Visibility,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FieldParsed` 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 `ident`, `attrs`, and `vis` are never read
[INFO] [stdout]   --> src/input.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct FieldParsed {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 21 |     pub ident: Option<Ident>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 22 |     pub ty: Type,
[INFO] [stdout] 23 |     pub attrs: Vec<Attribute>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 24 |     pub vis: Visibility,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FieldParsed` 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `ident`, `attrs`, and `vis` are never read
[INFO] [stdout]   --> src/input.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct FieldParsed {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 21 |     pub ident: Option<Ident>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 22 |     pub ty: Type,
[INFO] [stdout] 23 |     pub attrs: Vec<Attribute>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 24 |     pub vis: Visibility,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FieldParsed` 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.00s
[INFO] running `Command { std: "docker" "inspect" "77fb8afcebdde0369bf6200e31e1327aff0c51316308bc7ffea772d00076083b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77fb8afcebdde0369bf6200e31e1327aff0c51316308bc7ffea772d00076083b", kill_on_drop: false }`
[INFO] [stdout] 77fb8afcebdde0369bf6200e31e1327aff0c51316308bc7ffea772d00076083b