[INFO] fetching crate structmeta-derive 0.1.0...
[INFO] checking structmeta-derive-0.1.0 against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] extracting crate structmeta-derive 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate structmeta-derive 0.1.0 on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate structmeta-derive 0.1.0
[INFO] finished tweaking crates.io crate structmeta-derive 0.1.0
[INFO] tweaked toml for crates.io crate structmeta-derive 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a076af384ba5931501bacb31c33437751ace65f65354fa2678f7d2f53731b948
[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" "a076af384ba5931501bacb31c33437751ace65f65354fa2678f7d2f53731b948", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a076af384ba5931501bacb31c33437751ace65f65354fa2678f7d2f53731b948", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a076af384ba5931501bacb31c33437751ace65f65354fa2678f7d2f53731b948", kill_on_drop: false }`
[INFO] [stdout] a076af384ba5931501bacb31c33437751ace65f65354fa2678f7d2f53731b948
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5fa931d44ea6a6b8cd4c44567e985650c68e4cbeda27951e461329bf552ec4fb
[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" "5fa931d44ea6a6b8cd4c44567e985650c68e4cbeda27951e461329bf552ec4fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.70
[INFO] [stderr]     Checking proc-macro2 v1.0.26
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking structmeta-derive v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0369]: binary operation `==` cannot be applied to type `Option<&syn::Type>`
[INFO] [stdout]    --> src/struct_meta.rs:813:9
[INFO] [stdout]     |
[INFO] [stdout] 813 | /         assert_eq!(
[INFO] [stdout] 814 | |             get_option_element(&parse_quote!(Option<u8>)),
[INFO] [stdout] 815 | |             Some(&parse_quote!(u8))
[INFO] [stdout] 816 | |         );
[INFO] [stdout]     | |          ^
[INFO] [stdout]     | |          |
[INFO] [stdout]     | |__________Option<&syn::Type>
[INFO] [stdout]     |            Option<&_>
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `syn::Type` doesn't implement `Debug`
[INFO] [stdout]    --> src/struct_meta.rs:813:9
[INFO] [stdout]     |
[INFO] [stdout] 813 | /         assert_eq!(
[INFO] [stdout] 814 | |             get_option_element(&parse_quote!(Option<u8>)),
[INFO] [stdout] 815 | |             Some(&parse_quote!(u8))
[INFO] [stdout] 816 | |         );
[INFO] [stdout]     | |__________^ `syn::Type` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Debug` is not implemented for `syn::Type`
[INFO] [stdout]     = note: required because of the requirements on the impl of `Debug` for `&syn::Type`
[INFO] [stdout]     = note: 1 redundant requirements hidden
[INFO] [stdout]     = note: required because of the requirements on the impl of `Debug` for `Option<&syn::Type>`
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0369]: binary operation `==` cannot be applied to type `Option<&syn::Type>`
[INFO] [stdout]    --> src/struct_meta.rs:820:9
[INFO] [stdout]     |
[INFO] [stdout] 820 | /         assert_eq!(
[INFO] [stdout] 821 | |             get_option_element(&parse_quote!(option::Option<u8>)),
[INFO] [stdout] 822 | |             Some(&parse_quote!(u8))
[INFO] [stdout] 823 | |         );
[INFO] [stdout]     | |          ^
[INFO] [stdout]     | |          |
[INFO] [stdout]     | |__________Option<&syn::Type>
[INFO] [stdout]     |            Option<&_>
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `syn::Type` doesn't implement `Debug`
[INFO] [stdout]    --> src/struct_meta.rs:820:9
[INFO] [stdout]     |
[INFO] [stdout] 820 | /         assert_eq!(
[INFO] [stdout] 821 | |             get_option_element(&parse_quote!(option::Option<u8>)),
[INFO] [stdout] 822 | |             Some(&parse_quote!(u8))
[INFO] [stdout] 823 | |         );
[INFO] [stdout]     | |__________^ `syn::Type` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Debug` is not implemented for `syn::Type`
[INFO] [stdout]     = note: required because of the requirements on the impl of `Debug` for `&syn::Type`
[INFO] [stdout]     = note: 1 redundant requirements hidden
[INFO] [stdout]     = note: required because of the requirements on the impl of `Debug` for `Option<&syn::Type>`
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0369]: binary operation `==` cannot be applied to type `Option<&syn::Type>`
[INFO] [stdout]    --> src/struct_meta.rs:827:9
[INFO] [stdout]     |
[INFO] [stdout] 827 | /         assert_eq!(
[INFO] [stdout] 828 | |             get_option_element(&parse_quote!(core::option::Option<u8>)),
[INFO] [stdout] 829 | |             Some(&parse_quote!(u8))
[INFO] [stdout] 830 | |         );
[INFO] [stdout]     | |          ^
[INFO] [stdout]     | |          |
[INFO] [stdout]     | |__________Option<&syn::Type>
[INFO] [stdout]     |            Option<&_>
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `syn::Type` doesn't implement `Debug`
[INFO] [stdout]    --> src/struct_meta.rs:827:9
[INFO] [stdout]     |
[INFO] [stdout] 827 | /         assert_eq!(
[INFO] [stdout] 828 | |             get_option_element(&parse_quote!(core::option::Option<u8>)),
[INFO] [stdout] 829 | |             Some(&parse_quote!(u8))
[INFO] [stdout] 830 | |         );
[INFO] [stdout]     | |__________^ `syn::Type` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Debug` is not implemented for `syn::Type`
[INFO] [stdout]     = note: required because of the requirements on the impl of `Debug` for `&syn::Type`
[INFO] [stdout]     = note: 1 redundant requirements hidden
[INFO] [stdout]     = note: required because of the requirements on the impl of `Debug` for `Option<&syn::Type>`
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0369]: binary operation `==` cannot be applied to type `Option<&syn::Type>`
[INFO] [stdout]    --> src/struct_meta.rs:834:9
[INFO] [stdout]     |
[INFO] [stdout] 834 | /         assert_eq!(
[INFO] [stdout] 835 | |             get_option_element(&parse_quote!(std::option::Option<u8>)),
[INFO] [stdout] 836 | |             Some(&parse_quote!(u8))
[INFO] [stdout] 837 | |         );
[INFO] [stdout]     | |          ^
[INFO] [stdout]     | |          |
[INFO] [stdout]     | |__________Option<&syn::Type>
[INFO] [stdout]     |            Option<&_>
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `syn::Type` doesn't implement `Debug`
[INFO] [stdout]    --> src/struct_meta.rs:834:9
[INFO] [stdout]     |
[INFO] [stdout] 834 | /         assert_eq!(
[INFO] [stdout] 835 | |             get_option_element(&parse_quote!(std::option::Option<u8>)),
[INFO] [stdout] 836 | |             Some(&parse_quote!(u8))
[INFO] [stdout] 837 | |         );
[INFO] [stdout]     | |__________^ `syn::Type` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Debug` is not implemented for `syn::Type`
[INFO] [stdout]     = note: required because of the requirements on the impl of `Debug` for `&syn::Type`
[INFO] [stdout]     = note: 1 redundant requirements hidden
[INFO] [stdout]     = note: required because of the requirements on the impl of `Debug` for `Option<&syn::Type>`
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0369.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `structmeta-derive`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "5fa931d44ea6a6b8cd4c44567e985650c68e4cbeda27951e461329bf552ec4fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fa931d44ea6a6b8cd4c44567e985650c68e4cbeda27951e461329bf552ec4fb", kill_on_drop: false }`
[INFO] [stdout] 5fa931d44ea6a6b8cd4c44567e985650c68e4cbeda27951e461329bf552ec4fb