[INFO] fetching crate look_inside 0.2.1...
[INFO] testing look_inside-0.2.1 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-8
[INFO] extracting crate look_inside 0.2.1 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate look_inside 0.2.1
[INFO] finished tweaking crates.io crate look_inside 0.2.1
[INFO] tweaked toml for crates.io crate look_inside 0.2.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate look_inside 0.2.1 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate look_inside 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dbd719f0e499d2e06f6e92d6bd3c8fcab78dc812c2369572c479021a2f89d69f
[INFO] running `Command { std: "docker" "start" "-a" "dbd719f0e499d2e06f6e92d6bd3c8fcab78dc812c2369572c479021a2f89d69f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dbd719f0e499d2e06f6e92d6bd3c8fcab78dc812c2369572c479021a2f89d69f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbd719f0e499d2e06f6e92d6bd3c8fcab78dc812c2369572c479021a2f89d69f", kill_on_drop: false }`
[INFO] [stdout] dbd719f0e499d2e06f6e92d6bd3c8fcab78dc812c2369572c479021a2f89d69f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8be78253f05ee0329e543908b6d7d75551bddb68eb2a3adc6fceb5573cd66fc8
[INFO] running `Command { std: "docker" "start" "-a" "8be78253f05ee0329e543908b6d7d75551bddb68eb2a3adc6fceb5573cd66fc8", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.74
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.46
[INFO] [stderr]    Compiling look_inside_derive v0.1.0
[INFO] [stderr]    Compiling look_inside v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.54s
[INFO] running `Command { std: "docker" "inspect" "8be78253f05ee0329e543908b6d7d75551bddb68eb2a3adc6fceb5573cd66fc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8be78253f05ee0329e543908b6d7d75551bddb68eb2a3adc6fceb5573cd66fc8", kill_on_drop: false }`
[INFO] [stdout] 8be78253f05ee0329e543908b6d7d75551bddb68eb2a3adc6fceb5573cd66fc8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6bf1575d156f22b125734ff85e48a2b1caa67f534afbf1f2e73b43198943cfd9
[INFO] running `Command { std: "docker" "start" "-a" "6bf1575d156f22b125734ff85e48a2b1caa67f534afbf1f2e73b43198943cfd9", kill_on_drop: false }`
[INFO] [stderr]    Compiling look_inside v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]  --> examples/main.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(LookInside)]
[INFO] [stdout]   |          ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: message: DeriveInput {
[INFO] [stdout]               attrs: [],
[INFO] [stdout]               vis: Visibility::Inherited,
[INFO] [stdout]               ident: Ident {
[INFO] [stdout]                   ident: "StructInternals",
[INFO] [stdout]                   span: #0 bytes(68..83),
[INFO] [stdout]               },
[INFO] [stdout]               generics: Generics {
[INFO] [stdout]                   lt_token: None,
[INFO] [stdout]                   params: [],
[INFO] [stdout]                   gt_token: None,
[INFO] [stdout]                   where_clause: None,
[INFO] [stdout]               },
[INFO] [stdout]               data: Data::Struct {
[INFO] [stdout]                   struct_token: Struct,
[INFO] [stdout]                   fields: Fields::Named {
[INFO] [stdout]                       brace_token: Brace,
[INFO] [stdout]                       named: [
[INFO] [stdout]                           Field {
[INFO] [stdout]                               attrs: [],
[INFO] [stdout]                               vis: Visibility::Inherited,
[INFO] [stdout]                               mutability: FieldMutability::None,
[INFO] [stdout]                               ident: Some(
[INFO] [stdout]                                   Ident {
[INFO] [stdout]                                       ident: "attributes",
[INFO] [stdout]                                       span: #0 bytes(90..100),
[INFO] [stdout]                                   },
[INFO] [stdout]                               ),
[INFO] [stdout]                               colon_token: Some(
[INFO] [stdout]                                   Colon,
[INFO] [stdout]                               ),
[INFO] [stdout]                               ty: Type::Path {
[INFO] [stdout]                                   qself: None,
[INFO] [stdout]                                   path: Path {
[INFO] [stdout]                                       leading_colon: None,
[INFO] [stdout]                                       segments: [
[INFO] [stdout]                                           PathSegment {
[INFO] [stdout]                                               ident: Ident {
[INFO] [stdout]                                                   ident: "Vec",
[INFO] [stdout]                                                   span: #0 bytes(102..105),
[INFO] [stdout]                                               },
[INFO] [stdout]                                               arguments: PathArguments::AngleBracketed {
[INFO] [stdout]                                                   colon2_token: None,
[INFO] [stdout]                                                   lt_token: Lt,
[INFO] [stdout]                                                   args: [
[INFO] [stdout]                                                       GenericArgument::Type(
[INFO] [stdout]                                                           Type::Path {
[INFO] [stdout]                                                               qself: None,
[INFO] [stdout]                                                               path: Path {
[INFO] [stdout]                                                                   leading_colon: None,
[INFO] [stdout]                                                                   segments: [
[INFO] [stdout]                                                                       PathSegment {
[INFO] [stdout]                                                                           ident: Ident {
[INFO] [stdout]                                                                               ident: "syn",
[INFO] [stdout]                                                                               span: #0 bytes(106..109),
[INFO] [stdout]                                                                           },
[INFO] [stdout]                                                                           arguments: PathArguments::None,
[INFO] [stdout]                                                                       },
[INFO] [stdout]                                                                       PathSep,
[INFO] [stdout]                                                                       PathSegment {
[INFO] [stdout]                                                                           ident: Ident {
[INFO] [stdout]                                                                               ident: "Attribute",
[INFO] [stdout]                                                                               span: #0 bytes(111..120),
[INFO] [stdout]                                                                           },
[INFO] [stdout]                                                                           arguments: PathArguments::None,
[INFO] [stdout]                                                                       },
[INFO] [stdout]                                                                   ],
[INFO] [stdout]                                                               },
[INFO] [stdout]                                                           },
[INFO] [stdout]                                                       ),
[INFO] [stdout]                                                   ],
[INFO] [stdout]                                                   gt_token: Gt,
[INFO] [stdout]                                               },
[INFO] [stdout]                                           },
[INFO] [stdout]                                       ],
[INFO] [stdout]                                   },
[INFO] [stdout]                               },
[INFO] [stdout]                           },
[INFO] [stdout]                           Comma,
[INFO] [stdout]                           Field {
[INFO] [stdout]                               attrs: [],
[INFO] [stdout]                               vis: Visibility::Inherited,
[INFO] [stdout]                               mutability: FieldMutability::None,
[INFO] [stdout]                               ident: Some(
[INFO] [stdout]                                   Ident {
[INFO] [stdout]                                       ident: "visibility",
[INFO] [stdout]                                       span: #0 bytes(127..137),
[INFO] [stdout]                                   },
[INFO] [stdout]                               ),
[INFO] [stdout]                               colon_token: Some(
[INFO] [stdout]                                   Colon,
[INFO] [stdout]                               ),
[INFO] [stdout]                               ty: Type::Path {
[INFO] [stdout]                                   qself: None,
[INFO] [stdout]                                   path: Path {
[INFO] [stdout]                                       leading_colon: None,
[INFO] [stdout]                                       segments: [
[INFO] [stdout]                                           PathSegment {
[INFO] [stdout]                                               ident: Ident {
[INFO] [stdout]                                                   ident: "syn",
[INFO] [stdout]                                                   span: #0 bytes(139..142),
[INFO] [stdout]                                               },
[INFO] [stdout]                                               arguments: PathArguments::None,
[INFO] [stdout]                                           },
[INFO] [stdout]                                           PathSep,
[INFO] [stdout]                                           PathSegment {
[INFO] [stdout]                                               ident: Ident {
[INFO] [stdout]                                                   ident: "Visibility",
[INFO] [stdout]                                                   span: #0 bytes(144..154),
[INFO] [stdout]                                               },
[INFO] [stdout]                                               arguments: PathArguments::None,
[INFO] [stdout]                                           },
[INFO] [stdout]                                       ],
[INFO] [stdout]                                   },
[INFO] [stdout]                               },
[INFO] [stdout]                           },
[INFO] [stdout]                           Comma,
[INFO] [stdout]                           Field {
[INFO] [stdout]                               attrs: [],
[INFO] [stdout]                               vis: Visibility::Inherited,
[INFO] [stdout]                               mutability: FieldMutability::None,
[INFO] [stdout]                               ident: Some(
[INFO] [stdout]                                   Ident {
[INFO] [stdout]                                       ident: "ident",
[INFO] [stdout]                                       span: #0 bytes(160..165),
[INFO] [stdout]                                   },
[INFO] [stdout]                               ),
[INFO] [stdout]                               colon_token: Some(
[INFO] [stdout]                                   Colon,
[INFO] [stdout]                               ),
[INFO] [stdout]                               ty: Type::Path {
[INFO] [stdout]                                   qself: None,
[INFO] [stdout]                                   path: Path {
[INFO] [stdout]                                       leading_colon: None,
[INFO] [stdout]                                       segments: [
[INFO] [stdout]                                           PathSegment {
[INFO] [stdout]                                               ident: Ident {
[INFO] [stdout]                                                   ident: "syn",
[INFO] [stdout]                                                   span: #0 bytes(167..170),
[INFO] [stdout]                                               },
[INFO] [stdout]                                               arguments: PathArguments::None,
[INFO] [stdout]                                           },
[INFO] [stdout]                                           PathSep,
[INFO] [stdout]                                           PathSegment {
[INFO] [stdout]                                               ident: Ident {
[INFO] [stdout]                                                   ident: "Ident",
[INFO] [stdout]                                                   span: #0 bytes(172..177),
[INFO] [stdout]                                               },
[INFO] [stdout]                                               arguments: PathArguments::None,
[INFO] [stdout]                                           },
[INFO] [stdout]                                       ],
[INFO] [stdout]                                   },
[INFO] [stdout]                               },
[INFO] [stdout]                           },
[INFO] [stdout]                           Comma,
[INFO] [stdout]                           Field {
[INFO] [stdout]                               attrs: [],
[INFO] [stdout]                               vis: Visibility::Inherited,
[INFO] [stdout]                               mutability: FieldMutability::None,
[INFO] [stdout]                               ident: Some(
[INFO] [stdout]                                   Ident {
[INFO] [stdout]                                       ident: "generics",
[INFO] [stdout]                                       span: #0 bytes(183..191),
[INFO] [stdout]                                   },
[INFO] [stdout]                               ),
[INFO] [stdout]                               colon_token: Some(
[INFO] [stdout]                                   Colon,
[INFO] [stdout]                               ),
[INFO] [stdout]                               ty: Type::Path {
[INFO] [stdout]                                   qself: None,
[INFO] [stdout]                                   path: Path {
[INFO] [stdout]                                       leading_colon: None,
[INFO] [stdout]                                       segments: [
[INFO] [stdout]                                           PathSegment {
[INFO] [stdout]                                               ident: Ident {
[INFO] [stdout]                                                   ident: "syn",
[INFO] [stdout]                                                   span: #0 bytes(193..196),
[INFO] [stdout]                                               },
[INFO] [stdout]                                               arguments: PathArguments::None,
[INFO] [stdout]                                           },
[INFO] [stdout]                                           PathSep,
[INFO] [stdout]                                           PathSegment {
[INFO] [stdout]                                               ident: Ident {
[INFO] [stdout]                                                   ident: "Generics",
[INFO] [stdout]                                                   span: #0 bytes(198..206),
[INFO] [stdout]                                               },
[INFO] [stdout]                                               arguments: PathArguments::None,
[INFO] [stdout]                                           },
[INFO] [stdout]                                       ],
[INFO] [stdout]                                   },
[INFO] [stdout]                               },
[INFO] [stdout]                           },
[INFO] [stdout]                           Comma,
[INFO] [stdout]                           Field {
[INFO] [stdout]                               attrs: [],
[INFO] [stdout]                               vis: Visibility::Inherited,
[INFO] [stdout]                               mutability: FieldMutability::None,
[INFO] [stdout]                               ident: Some(
[INFO] [stdout]                                   Ident {
[INFO] [stdout]                                       ident: "fields",
[INFO] [stdout]                                       span: #0 bytes(212..218),
[INFO] [stdout]                                   },
[INFO] [stdout]                               ),
[INFO] [stdout]                               colon_token: Some(
[INFO] [stdout]                                   Colon,
[INFO] [stdout]                               ),
[INFO] [stdout]                               ty: Type::Path {
[INFO] [stdout]                                   qself: None,
[INFO] [stdout]                                   path: Path {
[INFO] [stdout]                                       leading_colon: None,
[INFO] [stdout]                                       segments: [
[INFO] [stdout]                                           PathSegment {
[INFO] [stdout]                                               ident: Ident {
[INFO] [stdout]                                                   ident: "syn",
[INFO] [stdout]                                                   span: #0 bytes(220..223),
[INFO] [stdout]                                               },
[INFO] [stdout]                                               arguments: PathArguments::None,
[INFO] [stdout]                                           },
[INFO] [stdout]                                           PathSep,
[INFO] [stdout]                                           PathSegment {
[INFO] [stdout]                                               ident: Ident {
[INFO] [stdout]                                                   ident: "Fields",
[INFO] [stdout]                                                   span: #0 bytes(225..231),
[INFO] [stdout]                                               },
[INFO] [stdout]                                               arguments: PathArguments::None,
[INFO] [stdout]                                           },
[INFO] [stdout]                                       ],
[INFO] [stdout]                                   },
[INFO] [stdout]                               },
[INFO] [stdout]                           },
[INFO] [stdout]                           Comma,
[INFO] [stdout]                       ],
[INFO] [stdout]                   },
[INFO] [stdout]                   semi_token: None,
[INFO] [stdout]               },
[INFO] [stdout]           }
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]   --> examples/main.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(LookInside)]
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: message: DeriveInput {
[INFO] [stdout]                attrs: [],
[INFO] [stdout]                vis: Visibility::Inherited,
[INFO] [stdout]                ident: Ident {
[INFO] [stdout]                    ident: "MyTypes",
[INFO] [stdout]                    span: #0 bytes(263..270),
[INFO] [stdout]                },
[INFO] [stdout]                generics: Generics {
[INFO] [stdout]                    lt_token: None,
[INFO] [stdout]                    params: [],
[INFO] [stdout]                    gt_token: None,
[INFO] [stdout]                    where_clause: None,
[INFO] [stdout]                },
[INFO] [stdout]                data: Data::Enum {
[INFO] [stdout]                    enum_token: Enum,
[INFO] [stdout]                    brace_token: Brace,
[INFO] [stdout]                    variants: [
[INFO] [stdout]                        Variant {
[INFO] [stdout]                            attrs: [],
[INFO] [stdout]                            ident: Ident {
[INFO] [stdout]                                ident: "A",
[INFO] [stdout]                                span: #0 bytes(277..278),
[INFO] [stdout]                            },
[INFO] [stdout]                            fields: Fields::Unnamed {
[INFO] [stdout]                                paren_token: Paren,
[INFO] [stdout]                                unnamed: [
[INFO] [stdout]                                    Field {
[INFO] [stdout]                                        attrs: [],
[INFO] [stdout]                                        vis: Visibility::Inherited,
[INFO] [stdout]                                        mutability: FieldMutability::None,
[INFO] [stdout]                                        ident: None,
[INFO] [stdout]                                        colon_token: None,
[INFO] [stdout]                                        ty: Type::Path {
[INFO] [stdout]                                            qself: None,
[INFO] [stdout]                                            path: Path {
[INFO] [stdout]                                                leading_colon: None,
[INFO] [stdout]                                                segments: [
[INFO] [stdout]                                                    PathSegment {
[INFO] [stdout]                                                        ident: Ident {
[INFO] [stdout]                                                            ident: "i32",
[INFO] [stdout]                                                            span: #0 bytes(279..282),
[INFO] [stdout]                                                        },
[INFO] [stdout]                                                        arguments: PathArguments::None,
[INFO] [stdout]                                                    },
[INFO] [stdout]                                                ],
[INFO] [stdout]                                            },
[INFO] [stdout]                                        },
[INFO] [stdout]                                    },
[INFO] [stdout]                                ],
[INFO] [stdout]                            },
[INFO] [stdout]                            discriminant: None,
[INFO] [stdout]                        },
[INFO] [stdout]                        Comma,
[INFO] [stdout]                        Variant {
[INFO] [stdout]                            attrs: [],
[INFO] [stdout]                            ident: Ident {
[INFO] [stdout]                                ident: "B",
[INFO] [stdout]                                span: #0 bytes(289..290),
[INFO] [stdout]                            },
[INFO] [stdout]                            fields: Fields::Unnamed {
[INFO] [stdout]                                paren_token: Paren,
[INFO] [stdout]                                unnamed: [
[INFO] [stdout]                                    Field {
[INFO] [stdout]                                        attrs: [],
[INFO] [stdout]                                        vis: Visibility::Inherited,
[INFO] [stdout]                                        mutability: FieldMutability::None,
[INFO] [stdout]                                        ident: None,
[INFO] [stdout]                                        colon_token: None,
[INFO] [stdout]                                        ty: Type::Path {
[INFO] [stdout]                                            qself: None,
[INFO] [stdout]                                            path: Path {
[INFO] [stdout]                                                leading_colon: None,
[INFO] [stdout]                                                segments: [
[INFO] [stdout]                                                    PathSegment {
[INFO] [stdout]                                                        ident: Ident {
[INFO] [stdout]                                                            ident: "String",
[INFO] [stdout]                                                            span: #0 bytes(291..297),
[INFO] [stdout]                                                        },
[INFO] [stdout]                                                        arguments: PathArguments::None,
[INFO] [stdout]                                                    },
[INFO] [stdout]                                                ],
[INFO] [stdout]                                            },
[INFO] [stdout]                                        },
[INFO] [stdout]                                    },
[INFO] [stdout]                                ],
[INFO] [stdout]                            },
[INFO] [stdout]                            discriminant: None,
[INFO] [stdout]                        },
[INFO] [stdout]                        Comma,
[INFO] [stdout]                        Variant {
[INFO] [stdout]                            attrs: [],
[INFO] [stdout]                            ident: Ident {
[INFO] [stdout]                                ident: "C",
[INFO] [stdout]                                span: #0 bytes(304..305),
[INFO] [stdout]                            },
[INFO] [stdout]                            fields: Fields::Named {
[INFO] [stdout]                                brace_token: Brace,
[INFO] [stdout]                                named: [
[INFO] [stdout]                                    Field {
[INFO] [stdout]                                        attrs: [],
[INFO] [stdout]                                        vis: Visibility::Inherited,
[INFO] [stdout]                                        mutability: FieldMutability::None,
[INFO] [stdout]                                        ident: Some(
[INFO] [stdout]                                            Ident {
[INFO] [stdout]                                                ident: "x",
[INFO] [stdout]                                                span: #0 bytes(308..309),
[INFO] [stdout]                                            },
[INFO] [stdout]                                        ),
[INFO] [stdout]                                        colon_token: Some(
[INFO] [stdout]                                            Colon,
[INFO] [stdout]                                        ),
[INFO] [stdout]                                        ty: Type::Path {
[INFO] [stdout]                                            qself: None,
[INFO] [stdout]                                            path: Path {
[INFO] [stdout]                                                leading_colon: None,
[INFO] [stdout]                                                segments: [
[INFO] [stdout]                                                    PathSegment {
[INFO] [stdout]                                                        ident: Ident {
[INFO] [stdout]                                                            ident: "i32",
[INFO] [stdout]                                                            span: #0 bytes(311..314),
[INFO] [stdout]                                                        },
[INFO] [stdout]                                                        arguments: PathArguments::None,
[INFO] [stdout]                                                    },
[INFO] [stdout]                                                ],
[INFO] [stdout]                                            },
[INFO] [stdout]                                        },
[INFO] [stdout]                                    },
[INFO] [stdout]                                    Comma,
[INFO] [stdout]                                    Field {
[INFO] [stdout]                                        attrs: [],
[INFO] [stdout]                                        vis: Visibility::Inherited,
[INFO] [stdout]                                        mutability: FieldMutability::None,
[INFO] [stdout]                                        ident: Some(
[INFO] [stdout]                                            Ident {
[INFO] [stdout]                                                ident: "y",
[INFO] [stdout]                                                span: #0 bytes(316..317),
[INFO] [stdout]                                            },
[INFO] [stdout]                                        ),
[INFO] [stdout]                                        colon_token: Some(
[INFO] [stdout]                                            Colon,
[INFO] [stdout]                                        ),
[INFO] [stdout]                                        ty: Type::Path {
[INFO] [stdout]                                            qself: None,
[INFO] [stdout]                                            path: Path {
[INFO] [stdout]                                                leading_colon: None,
[INFO] [stdout]                                                segments: [
[INFO] [stdout]                                                    PathSegment {
[INFO] [stdout]                                                        ident: Ident {
[INFO] [stdout]                                                            ident: "i32",
[INFO] [stdout]                                                            span: #0 bytes(319..322),
[INFO] [stdout]                                                        },
[INFO] [stdout]                                                        arguments: PathArguments::None,
[INFO] [stdout]                                                    },
[INFO] [stdout]                                                ],
[INFO] [stdout]                                            },
[INFO] [stdout]                                        },
[INFO] [stdout]                                    },
[INFO] [stdout]                                ],
[INFO] [stdout]                            },
[INFO] [stdout]                            discriminant: None,
[INFO] [stdout]                        },
[INFO] [stdout]                        Comma,
[INFO] [stdout]                        Variant {
[INFO] [stdout]                            attrs: [],
[INFO] [stdout]                            ident: Ident {
[INFO] [stdout]                                ident: "D",
[INFO] [stdout]                                span: #0 bytes(330..331),
[INFO] [stdout]                            },
[INFO] [stdout]                            fields: Fields::Unit,
[INFO] [stdout]                            discriminant: None,
[INFO] [stdout]                        },
[INFO] [stdout]                        Comma,
[INFO] [stdout]                    ],
[INFO] [stdout]                },
[INFO] [stdout]            }
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]   --> examples/main.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | #[derive(LookInside)]
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: message: DeriveInput {
[INFO] [stdout]                attrs: [],
[INFO] [stdout]                vis: Visibility::Inherited,
[INFO] [stdout]                ident: Ident {
[INFO] [stdout]                    ident: "MyUnion",
[INFO] [stdout]                    span: #0 bytes(364..371),
[INFO] [stdout]                },
[INFO] [stdout]                generics: Generics {
[INFO] [stdout]                    lt_token: None,
[INFO] [stdout]                    params: [],
[INFO] [stdout]                    gt_token: None,
[INFO] [stdout]                    where_clause: None,
[INFO] [stdout]                },
[INFO] [stdout]                data: Data::Union {
[INFO] [stdout]                    union_token: Union,
[INFO] [stdout]                    fields: FieldsNamed {
[INFO] [stdout]                        brace_token: Brace,
[INFO] [stdout]                        named: [
[INFO] [stdout]                            Field {
[INFO] [stdout]                                attrs: [],
[INFO] [stdout]                                vis: Visibility::Inherited,
[INFO] [stdout]                                mutability: FieldMutability::None,
[INFO] [stdout]                                ident: Some(
[INFO] [stdout]                                    Ident {
[INFO] [stdout]                                        ident: "a",
[INFO] [stdout]                                        span: #0 bytes(378..379),
[INFO] [stdout]                                    },
[INFO] [stdout]                                ),
[INFO] [stdout]                                colon_token: Some(
[INFO] [stdout]                                    Colon,
[INFO] [stdout]                                ),
[INFO] [stdout]                                ty: Type::Path {
[INFO] [stdout]                                    qself: None,
[INFO] [stdout]                                    path: Path {
[INFO] [stdout]                                        leading_colon: None,
[INFO] [stdout]                                        segments: [
[INFO] [stdout]                                            PathSegment {
[INFO] [stdout]                                                ident: Ident {
[INFO] [stdout]                                                    ident: "i32",
[INFO] [stdout]                                                    span: #0 bytes(381..384),
[INFO] [stdout]                                                },
[INFO] [stdout]                                                arguments: PathArguments::None,
[INFO] [stdout]                                            },
[INFO] [stdout]                                        ],
[INFO] [stdout]                                    },
[INFO] [stdout]                                },
[INFO] [stdout]                            },
[INFO] [stdout]                            Comma,
[INFO] [stdout]                            Field {
[INFO] [stdout]                                attrs: [],
[INFO] [stdout]                                vis: Visibility::Inherited,
[INFO] [stdout]                                mutability: FieldMutability::None,
[INFO] [stdout]                                ident: Some(
[INFO] [stdout]                                    Ident {
[INFO] [stdout]                                        ident: "b",
[INFO] [stdout]                                        span: #0 bytes(390..391),
[INFO] [stdout]                                    },
[INFO] [stdout]                                ),
[INFO] [stdout]                                colon_token: Some(
[INFO] [stdout]                                    Colon,
[INFO] [stdout]                                ),
[INFO] [stdout]                                ty: Type::Path {
[INFO] [stdout]                                    qself: None,
[INFO] [stdout]                                    path: Path {
[INFO] [stdout]                                        leading_colon: None,
[INFO] [stdout]                                        segments: [
[INFO] [stdout]                                            PathSegment {
[INFO] [stdout]                                                ident: Ident {
[INFO] [stdout]                                                    ident: "std",
[INFO] [stdout]                                                    span: #0 bytes(393..396),
[INFO] [stdout]                                                },
[INFO] [stdout]                                                arguments: PathArguments::None,
[INFO] [stdout]                                            },
[INFO] [stdout]                                            PathSep,
[INFO] [stdout]                                            PathSegment {
[INFO] [stdout]                                                ident: Ident {
[INFO] [stdout]                                                    ident: "mem",
[INFO] [stdout]                                                    span: #0 bytes(398..401),
[INFO] [stdout]                                                },
[INFO] [stdout]                                                arguments: PathArguments::None,
[INFO] [stdout]                                            },
[INFO] [stdout]                                            PathSep,
[INFO] [stdout]                                            PathSegment {
[INFO] [stdout]                                                ident: Ident {
[INFO] [stdout]                                                    ident: "ManuallyDrop",
[INFO] [stdout]                                                    span: #0 bytes(403..415),
[INFO] [stdout]                                                },
[INFO] [stdout]                                                arguments: PathArguments::AngleBracketed {
[INFO] [stdout]                                                    colon2_token: None,
[INFO] [stdout]                                                    lt_token: Lt,
[INFO] [stdout]                                                    args: [
[INFO] [stdout]                                                        GenericArgument::Type(
[INFO] [stdout]                                                            Type::Path {
[INFO] [stdout]                                                                qself: None,
[INFO] [stdout]                                                                path: Path {
[INFO] [stdout]                                                                    leading_colon: None,
[INFO] [stdout]                                                                    segments: [
[INFO] [stdout]                                                                        PathSegment {
[INFO] [stdout]                                                                            ident: Ident {
[INFO] [stdout]                                                                                ident: "TestStruct",
[INFO] [stdout]                                                                                span: #0 bytes(416..426),
[INFO] [stdout]                                                                            },
[INFO] [stdout]                                                                            arguments: PathArguments::None,
[INFO] [stdout]                                                                        },
[INFO] [stdout]                                                                    ],
[INFO] [stdout]                                                                },
[INFO] [stdout]                                                            },
[INFO] [stdout]                                                        ),
[INFO] [stdout]                                                    ],
[INFO] [stdout]                                                    gt_token: Gt,
[INFO] [stdout]                                                },
[INFO] [stdout]                                            },
[INFO] [stdout]                                        ],
[INFO] [stdout]                                    },
[INFO] [stdout]                                },
[INFO] [stdout]                            },
[INFO] [stdout]                            Comma,
[INFO] [stdout]                        ],
[INFO] [stdout]                    },
[INFO] [stdout]                },
[INFO] [stdout]            }
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `TestStruct` in this scope
[INFO] [stdout]   --> examples/main.rs:24:31
[INFO] [stdout]    |
[INFO] [stdout] 24 |     b: std::mem::ManuallyDrop<TestStruct>,
[INFO] [stdout]    |                               ^^^^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: you might be missing a type parameter
[INFO] [stdout]    |
[INFO] [stdout] 22 | union MyUnion<TestStruct> {
[INFO] [stdout]    |              ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `look_inside` (example "main") due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "6bf1575d156f22b125734ff85e48a2b1caa67f534afbf1f2e73b43198943cfd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bf1575d156f22b125734ff85e48a2b1caa67f534afbf1f2e73b43198943cfd9", kill_on_drop: false }`
[INFO] [stdout] 6bf1575d156f22b125734ff85e48a2b1caa67f534afbf1f2e73b43198943cfd9
