[INFO] fetching crate miniserde-enum 0.1.3...
[INFO] checking miniserde-enum-0.1.3 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] extracting crate miniserde-enum 0.1.3 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate miniserde-enum 0.1.3 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 miniserde-enum 0.1.3
[INFO] finished tweaking crates.io crate miniserde-enum 0.1.3
[INFO] tweaked toml for crates.io crate miniserde-enum 0.1.3 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate miniserde-enum 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mini-internal v0.1.12
[INFO] [stderr]   Downloaded miniserde v0.1.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 9f1b9e16b22ee8cc865d4f063912330ba2d552e98b84f066a95c0c235e346bbe
[INFO] running `Command { std: "docker" "start" "-a" "9f1b9e16b22ee8cc865d4f063912330ba2d552e98b84f066a95c0c235e346bbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9f1b9e16b22ee8cc865d4f063912330ba2d552e98b84f066a95c0c235e346bbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f1b9e16b22ee8cc865d4f063912330ba2d552e98b84f066a95c0c235e346bbe", kill_on_drop: false }`
[INFO] [stdout] 9f1b9e16b22ee8cc865d4f063912330ba2d552e98b84f066a95c0c235e346bbe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 0386808df6c1dd681763de274e2b2e254e8f8979e3ddb9af5dc179060a258b66
[INFO] running `Command { std: "docker" "start" "-a" "0386808df6c1dd681763de274e2b2e254e8f8979e3ddb9af5dc179060a258b66", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling mini-internal v0.1.12
[INFO] [stderr]     Checking miniserde v0.1.12
[INFO] [stderr]     Checking miniserde-enum v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: derive helper attribute is used before it is introduced
[INFO] [stdout]  --> tests/serialize.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 |     #[serde(tag = "type")]
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout] 7 |     #[derive(Serialize_enum)]
[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]   --> tests/serialize.rs:44:7
[INFO] [stdout]    |
[INFO] [stdout] 44 |     #[serde(untagged)]
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 45 |     #[derive(Serialize_enum)]
[INFO] [stdout]    |              -------------- the attribute is introduced here
[INFO] [stdout]    |
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.83s
[INFO] running `Command { std: "docker" "inspect" "0386808df6c1dd681763de274e2b2e254e8f8979e3ddb9af5dc179060a258b66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0386808df6c1dd681763de274e2b2e254e8f8979e3ddb9af5dc179060a258b66", kill_on_drop: false }`
[INFO] [stdout] 0386808df6c1dd681763de274e2b2e254e8f8979e3ddb9af5dc179060a258b66