[INFO] fetching crate miniserde-enum 0.1.3...
[INFO] checking miniserde-enum-0.1.3 against master#f82664191d0e8764b7435b9d72eb0e366b8b1464 for pr-83354
[INFO] extracting crate miniserde-enum 0.1.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate miniserde-enum 0.1.3 on toolchain f82664191d0e8764b7435b9d72eb0e366b8b1464
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "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-4/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" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 05b741f5f2d8e6a1dbc9a2bd8f1d7f5a617d21d5c81bc00da472591d2eee5c9b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "05b741f5f2d8e6a1dbc9a2bd8f1d7f5a617d21d5c81bc00da472591d2eee5c9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05b741f5f2d8e6a1dbc9a2bd8f1d7f5a617d21d5c81bc00da472591d2eee5c9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05b741f5f2d8e6a1dbc9a2bd8f1d7f5a617d21d5c81bc00da472591d2eee5c9b", kill_on_drop: false }`
[INFO] [stdout] 05b741f5f2d8e6a1dbc9a2bd8f1d7f5a617d21d5c81bc00da472591d2eee5c9b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7f71dc06887db19b5d65f4b2345a3724a86fefcfd1954fa83204e71943d38ce
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a7f71dc06887db19b5d65f4b2345a3724a86fefcfd1954fa83204e71943d38ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking syn v1.0.5
[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 32.93s
[INFO] running `Command { std: "docker" "inspect" "a7f71dc06887db19b5d65f4b2345a3724a86fefcfd1954fa83204e71943d38ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7f71dc06887db19b5d65f4b2345a3724a86fefcfd1954fa83204e71943d38ce", kill_on_drop: false }`
[INFO] [stdout] a7f71dc06887db19b5d65f4b2345a3724a86fefcfd1954fa83204e71943d38ce