[INFO] fetching crate macon_derive 1.2.0...
[INFO] checking macon_derive-1.2.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate macon_derive 1.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate macon_derive 1.2.0 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate macon_derive 1.2.0
[INFO] finished tweaking crates.io crate macon_derive 1.2.0
[INFO] tweaked toml for crates.io crate macon_derive 1.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c62e723b7bb0d718cd13b5638a1c57983e90e2883a886e15891d1c9fdb0f73e
[INFO] running `Command { std: "docker" "start" "-a" "8c62e723b7bb0d718cd13b5638a1c57983e90e2883a886e15891d1c9fdb0f73e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c62e723b7bb0d718cd13b5638a1c57983e90e2883a886e15891d1c9fdb0f73e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c62e723b7bb0d718cd13b5638a1c57983e90e2883a886e15891d1c9fdb0f73e", kill_on_drop: false }`
[INFO] [stdout] 8c62e723b7bb0d718cd13b5638a1c57983e90e2883a886e15891d1c9fdb0f73e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 386371fcd34ff1fd9528fe1fdc9f695e4bf7b77ab742ad73a76f669613746a4d
[INFO] running `Command { std: "docker" "start" "-a" "386371fcd34ff1fd9528fe1fdc9f695e4bf7b77ab742ad73a76f669613746a4d", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-ident v1.0.13
[INFO] [stderr]     Checking proc-macro2 v1.0.86
[INFO] [stderr]     Checking quote v1.0.37
[INFO] [stderr]     Checking syn v2.0.77
[INFO] [stderr]     Checking macon_derive v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `option`, `default`, and `into` are never read
[INFO] [stdout]   --> src/model.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub struct PropertySettings {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] 71 |     pub option: Setting<Type>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 72 |     pub default: Setting<()>,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 73 |     pub into: Setting<()>,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PropertySettings` 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: fields `option`, `default`, and `into` are never read
[INFO] [stdout]   --> src/model.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub struct PropertySettings {
[INFO] [stdout]    |            ---------------- fields in this struct
[INFO] [stdout] 71 |     pub option: Setting<Type>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 72 |     pub default: Setting<()>,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 73 |     pub into: Setting<()>,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PropertySettings` 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 3.11s
[INFO] running `Command { std: "docker" "inspect" "386371fcd34ff1fd9528fe1fdc9f695e4bf7b77ab742ad73a76f669613746a4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "386371fcd34ff1fd9528fe1fdc9f695e4bf7b77ab742ad73a76f669613746a4d", kill_on_drop: false }`
[INFO] [stdout] 386371fcd34ff1fd9528fe1fdc9f695e4bf7b77ab742ad73a76f669613746a4d