[INFO] fetching crate packing 0.2.0...
[INFO] checking packing-0.2.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate packing 0.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate packing 0.2.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate packing 0.2.0
[INFO] finished tweaking crates.io crate packing 0.2.0
[INFO] tweaked toml for crates.io crate packing 0.2.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded packing_codegen v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca0fb37de35e3a149fb5800e6602a06c1d48696b84a314ae7017aacca16f8a71
[INFO] running `Command { std: "docker" "start" "-a" "ca0fb37de35e3a149fb5800e6602a06c1d48696b84a314ae7017aacca16f8a71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca0fb37de35e3a149fb5800e6602a06c1d48696b84a314ae7017aacca16f8a71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca0fb37de35e3a149fb5800e6602a06c1d48696b84a314ae7017aacca16f8a71", kill_on_drop: false }`
[INFO] [stdout] ca0fb37de35e3a149fb5800e6602a06c1d48696b84a314ae7017aacca16f8a71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55d16c49e6a3d5b85fd7d03a5945018b08d5545b4387ff84fe356459602ee4dc
[INFO] running `Command { std: "docker" "start" "-a" "55d16c49e6a3d5b85fd7d03a5945018b08d5545b4387ff84fe356459602ee4dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling packing_codegen v0.1.0
[INFO] [stderr]     Checking packing v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `bool_pack::*`
[INFO] [stdout]  --> src/primitive_packing/mod.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub use bool_pack::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `u8_pack::*`
[INFO] [stdout]  --> src/primitive_packing/mod.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use u8_pack::*;
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `u16_pack::*`
[INFO] [stdout]  --> src/primitive_packing/mod.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub use u16_pack::*;
[INFO] [stdout]   |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `u32_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub use u32_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `u64_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub use u64_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `u128_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub use u128_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `i8_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub use i8_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `i16_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub use i16_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `i32_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub use i32_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `i64_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub use i64_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `i128_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub use i128_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `f32_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub use f32_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `f64_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub use f64_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `primitive_packing::*`
[INFO] [stdout]   --> src/lib.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub use primitive_packing::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `bool_pack::*`
[INFO] [stdout]  --> src/primitive_packing/mod.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub use bool_pack::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `u8_pack::*`
[INFO] [stdout]  --> src/primitive_packing/mod.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use u8_pack::*;
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `u16_pack::*`
[INFO] [stdout]  --> src/primitive_packing/mod.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub use u16_pack::*;
[INFO] [stdout]   |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `u32_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub use u32_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `u64_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub use u64_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `u128_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub use u128_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `i8_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub use i8_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `i16_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub use i16_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `i32_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub use i32_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `i64_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub use i64_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `i128_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub use i128_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `f32_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub use f32_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `f64_pack::*`
[INFO] [stdout]   --> src/primitive_packing/mod.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub use f64_pack::*;
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `primitive_packing::*`
[INFO] [stdout]   --> src/lib.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub use primitive_packing::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.01s
[INFO] running `Command { std: "docker" "inspect" "55d16c49e6a3d5b85fd7d03a5945018b08d5545b4387ff84fe356459602ee4dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55d16c49e6a3d5b85fd7d03a5945018b08d5545b4387ff84fe356459602ee4dc", kill_on_drop: false }`
[INFO] [stdout] 55d16c49e6a3d5b85fd7d03a5945018b08d5545b4387ff84fe356459602ee4dc
[INFO] checking packing-0.2.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate packing 0.2.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate packing 0.2.0 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate packing 0.2.0
[INFO] finished tweaking crates.io crate packing 0.2.0
[INFO] tweaked toml for crates.io crate packing 0.2.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9d348e43cf1232f87f380075aecd1855e03f2b787bdc4e73e4bbab6aab4d2caa
[INFO] running `Command { std: "docker" "start" "-a" "9d348e43cf1232f87f380075aecd1855e03f2b787bdc4e73e4bbab6aab4d2caa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9d348e43cf1232f87f380075aecd1855e03f2b787bdc4e73e4bbab6aab4d2caa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d348e43cf1232f87f380075aecd1855e03f2b787bdc4e73e4bbab6aab4d2caa", kill_on_drop: false }`
[INFO] [stdout] 9d348e43cf1232f87f380075aecd1855e03f2b787bdc4e73e4bbab6aab4d2caa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4170e7c2ccd6e49ef3674b7e8d82c8d37417999f42cc97b074dd3b88fadc121
[INFO] running `Command { std: "docker" "start" "-a" "d4170e7c2ccd6e49ef3674b7e8d82c8d37417999f42cc97b074dd3b88fadc121", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling packing_codegen v0.1.0
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/packing_codegen-0.1.0/src/lib.rs:157:25
[INFO] [stdout]     |
[INFO] [stdout] 157 | ...   Err(Error::new(l.path.span(), "pkd abbreviated attribute expects exactly 4 values: #[pkd(<start_bit>, <end_bit>, <start_byte>, <end...
[INFO] [stdout]     |       ^^^ cannot infer type of the type parameter `T` declared on the enum `Result`
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 157 |                         Err::<T, syn::Error>(Error::new(l.path.span(), "pkd abbreviated attribute expects exactly 4 values: #[pkd(<start_bit>, <end_bit>, <start_byte>, <end_byte>)]"))?;
[INFO] [stdout]     |                            +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/packing_codegen-0.1.0/src/lib.rs:612:17
[INFO] [stdout]     |
[INFO] [stdout] 612 |                 Err(Error::new(field.end_bit.0.unwrap().1, 
[INFO] [stdout]     |                 ^^^ cannot infer type of the type parameter `T` declared on the enum `Result`
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 612 |                 Err::<T, syn::Error>(Error::new(field.end_bit.0.unwrap().1, 
[INFO] [stdout]     |                    +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/packing_codegen-0.1.0/src/lib.rs:883:13
[INFO] [stdout]     |
[INFO] [stdout] 883 |             Err(Error::new(ident.span(), "Only unit variants supported by Packed derive"))?;
[INFO] [stdout]     |             ^^^ cannot infer type of the type parameter `T` declared on the enum `Result`
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 883 |             Err::<T, syn::Error>(Error::new(ident.span(), "Only unit variants supported by Packed derive"))?;
[INFO] [stdout]     |                +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `packing_codegen` (lib) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "d4170e7c2ccd6e49ef3674b7e8d82c8d37417999f42cc97b074dd3b88fadc121", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4170e7c2ccd6e49ef3674b7e8d82c8d37417999f42cc97b074dd3b88fadc121", kill_on_drop: false }`
[INFO] [stdout] d4170e7c2ccd6e49ef3674b7e8d82c8d37417999f42cc97b074dd3b88fadc121