[INFO] fetching crate numberer 0.2.0...
[INFO] checking numberer-0.2.0 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] extracting crate numberer 0.2.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate numberer 0.2.0 on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate numberer 0.2.0
[INFO] finished tweaking crates.io crate numberer 0.2.0
[INFO] tweaked toml for crates.io crate numberer 0.2.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3949b82650307b70c86d9df17d50bd0a1577ef81ce76e4a31bb72f6615e92780
[INFO] running `Command { std: "docker" "start" "-a" "3949b82650307b70c86d9df17d50bd0a1577ef81ce76e4a31bb72f6615e92780", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3949b82650307b70c86d9df17d50bd0a1577ef81ce76e4a31bb72f6615e92780", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3949b82650307b70c86d9df17d50bd0a1577ef81ce76e4a31bb72f6615e92780", kill_on_drop: false }`
[INFO] [stdout] 3949b82650307b70c86d9df17d50bd0a1577ef81ce76e4a31bb72f6615e92780
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad9b783ad55135b63dfba23559ae29234564d30960c41f9d949f3b7cc363dcd8
[INFO] running `Command { std: "docker" "start" "-a" "ad9b783ad55135b63dfba23559ae29234564d30960c41f9d949f3b7cc363dcd8", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking numberer v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: derive helper attribute is used before it is introduced
[INFO] [stdout]   --> src/lib.rs:52:3
[INFO] [stdout]    |
[INFO] [stdout] 52 | #[serde(from = "SerializedNumberer<T>", into = "SerializedNumberer<T>")]
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 53 | #[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
[INFO] [stdout]    |                                       --------- the attribute is introduced here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(legacy_derive_helpers)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: derive helper attribute is used before it is introduced
[INFO] [stdout]   --> src/lib.rs:52:3
[INFO] [stdout]    |
[INFO] [stdout] 52 | #[serde(from = "SerializedNumberer<T>", into = "SerializedNumberer<T>")]
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 53 | #[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
[INFO] [stdout]    |                                       --------- the attribute is introduced here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(legacy_derive_helpers)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.64s
[INFO] running `Command { std: "docker" "inspect" "ad9b783ad55135b63dfba23559ae29234564d30960c41f9d949f3b7cc363dcd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad9b783ad55135b63dfba23559ae29234564d30960c41f9d949f3b7cc363dcd8", kill_on_drop: false }`
[INFO] [stdout] ad9b783ad55135b63dfba23559ae29234564d30960c41f9d949f3b7cc363dcd8