[INFO] fetching crate darling 0.13.0-beta...
[INFO] checking darling-0.13.0-beta against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate darling 0.13.0-beta into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate darling 0.13.0-beta on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate darling 0.13.0-beta
[INFO] finished tweaking crates.io crate darling 0.13.0-beta
[INFO] tweaked toml for crates.io crate darling 0.13.0-beta written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate darling 0.13.0-beta already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7e9af8cdb1c2965fa61429182255ee4f5eee3974ecbb6d7c301fd032f6808c71
[INFO] running `Command { std: "docker" "start" "-a" "7e9af8cdb1c2965fa61429182255ee4f5eee3974ecbb6d7c301fd032f6808c71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e9af8cdb1c2965fa61429182255ee4f5eee3974ecbb6d7c301fd032f6808c71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e9af8cdb1c2965fa61429182255ee4f5eee3974ecbb6d7c301fd032f6808c71", kill_on_drop: false }`
[INFO] [stdout] 7e9af8cdb1c2965fa61429182255ee4f5eee3974ecbb6d7c301fd032f6808c71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3cda66e2ccc73df68111aed57c2ba69ca20cdd5ae8d1f35e1b1bba4a73c45ed0
[INFO] running `Command { std: "docker" "start" "-a" "3cda66e2ccc73df68111aed57c2ba69ca20cdd5ae8d1f35e1b1bba4a73c45ed0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]     Checking proc-macro2 v1.0.26
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking darling_core v0.13.0-beta
[INFO] [stderr]    Compiling darling_macro v0.13.0-beta
[INFO] [stderr]     Checking darling v0.13.0-beta (/opt/rustwide/workdir)
[INFO] [stdout] warning: derive helper attribute is used before it is introduced
[INFO] [stdout]  --> tests/from_type_param_default.rs:4:3
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[darling(attributes(lorem), default)]
[INFO] [stdout]   |   ^^^^^^^
[INFO] [stdout] 5 | #[derive(Default, FromTypeParam)]
[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/from_type_param.rs:4:3
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[darling(attributes(lorem), from_ident)]
[INFO] [stdout]   |   ^^^^^^^
[INFO] [stdout] 5 | #[derive(FromTypeParam)]
[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 37.72s
[INFO] running `Command { std: "docker" "inspect" "3cda66e2ccc73df68111aed57c2ba69ca20cdd5ae8d1f35e1b1bba4a73c45ed0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cda66e2ccc73df68111aed57c2ba69ca20cdd5ae8d1f35e1b1bba4a73c45ed0", kill_on_drop: false }`
[INFO] [stdout] 3cda66e2ccc73df68111aed57c2ba69ca20cdd5ae8d1f35e1b1bba4a73c45ed0