[INFO] fetching crate structural-convert-derive 0.3.0...
[INFO] checking structural-convert-derive-0.3.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate structural-convert-derive 0.3.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate structural-convert-derive 0.3.0
[INFO] finished tweaking crates.io crate structural-convert-derive 0.3.0
[INFO] tweaked toml for crates.io crate structural-convert-derive 0.3.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate structural-convert-derive 0.3.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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 10 packages to latest compatible versions
[INFO] [stderr]       Adding darling v0.14.4 (available: v0.20.11)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.104)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6125ad3b36ed62f1ee41a7f54eb7daae588de1ee03cab811bb8ce59278ec355f
[INFO] running `Command { std: "docker" "start" "-a" "6125ad3b36ed62f1ee41a7f54eb7daae588de1ee03cab811bb8ce59278ec355f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6125ad3b36ed62f1ee41a7f54eb7daae588de1ee03cab811bb8ce59278ec355f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6125ad3b36ed62f1ee41a7f54eb7daae588de1ee03cab811bb8ce59278ec355f", kill_on_drop: false }`
[INFO] [stdout] 6125ad3b36ed62f1ee41a7f54eb7daae588de1ee03cab811bb8ce59278ec355f
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97c440c0029e081a452e52d32a0db89445e71a74db811deee45dbfe73e17f7b8
[INFO] running `Command { std: "docker" "start" "-a" "97c440c0029e081a452e52d32a0db89445e71a74db811deee45dbfe73e17f7b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]     Checking proc-macro2 v1.0.95
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking darling_core v0.14.4
[INFO] [stderr]    Compiling darling_macro v0.14.4
[INFO] [stderr]     Checking darling v0.14.4
[INFO] [stderr]     Checking structural-convert-derive v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `default` is never read
[INFO] [stdout]   --> src/structural_convert/attributes/named_field/into_field_named_attributes.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct IntoFieldNamedAttributes {
[INFO] [stdout]    |            ------------------------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub default: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IntoFieldNamedAttributes` 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 `default` is never read
[INFO] [stdout]   --> src/structural_convert/attributes/named_field/into_field_named_attributes.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct IntoFieldNamedAttributes {
[INFO] [stdout]    |            ------------------------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub default: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IntoFieldNamedAttributes` 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.99s
[INFO] running `Command { std: "docker" "inspect" "97c440c0029e081a452e52d32a0db89445e71a74db811deee45dbfe73e17f7b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97c440c0029e081a452e52d32a0db89445e71a74db811deee45dbfe73e17f7b8", kill_on_drop: false }`
[INFO] [stdout] 97c440c0029e081a452e52d32a0db89445e71a74db811deee45dbfe73e17f7b8