[INFO] fetching crate serial_traits_derive 1.2.0...
[INFO] checking serial_traits_derive-1.2.0 against a5689b034ad287112f709693384a37f1377eb9cc for pr-129249-3
[INFO] extracting crate serial_traits_derive 1.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate serial_traits_derive 1.2.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate serial_traits_derive 1.2.0
[INFO] tweaked toml for crates.io crate serial_traits_derive 1.2.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serial_traits_derive 1.2.0 on toolchain a5689b034ad287112f709693384a37f1377eb9cc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate serial_traits_derive 1.2.0 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" "+a5689b034ad287112f709693384a37f1377eb9cc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] abf29e44424104662070da2c95edfb866297fa2b00277e41028effd17b6c03e0
[INFO] running `Command { std: "docker" "start" "abf29e44424104662070da2c95edfb866297fa2b00277e41028effd17b6c03e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abf29e44424104662070da2c95edfb866297fa2b00277e41028effd17b6c03e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "abf29e44424104662070da2c95edfb866297fa2b00277e41028effd17b6c03e0" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abf29e44424104662070da2c95edfb866297fa2b00277e41028effd17b6c03e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "abf29e44424104662070da2c95edfb866297fa2b00277e41028effd17b6c03e0" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]     Checking serial_traits v1.1.2
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]     Checking serial_traits_derive v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: useless conversion to the same type: `proc_macro2::TokenStream`
[INFO] [stdout]    --> src/enums.rs:137:21
[INFO] [stdout]     |
[INFO] [stdout] 137 | /                     quote! {
[INFO] [stdout] 138 | |                         #name::#ident => (#enum_id_counter as #prefix_type).serialize()
[INFO] [stdout] 139 | |                     }
[INFO] [stdout] 140 | |                     .into(),
[INFO] [stdout]     | |___________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `proc_macro2::TokenStream`
[INFO] [stdout]    --> src/enums.rs:142:37
[INFO] [stdout]     |
[INFO] [stdout] 142 |                 variant_parser.push(quote! { Some(#name::#ident) }.into());
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `proc_macro2::TokenStream`
[INFO] [stdout]    --> src/enums.rs:148:37
[INFO] [stdout]     |
[INFO] [stdout] 148 |     let prefix_type: TokenStream2 = prefix_type.into();
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 148 -     let prefix_type: TokenStream2 = prefix_type.into();
[INFO] [stdout] 148 +     let prefix_type: TokenStream2 = prefix_type;
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 148 -     let prefix_type: TokenStream2 = prefix_type.into();
[INFO] [stdout] 148 +     let prefix_type: TokenStream2 = <proc_macro2::TokenStream as Into<_>>::into(prefix_type);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `proc_macro::TokenStream`
[INFO] [stdout]    --> src/structs.rs:398:5
[INFO] [stdout]     |
[INFO] [stdout] 398 | /     match &data_struct.fields {
[INFO] [stdout] 399 | |         // struct Struct { name: type, name: type }
[INFO] [stdout] 400 | |         Fields::Named(fields_named) => impl_serializable_struct_named(fields_named, name),
[INFO] [stdout] ...   |
[INFO] [stdout] 406 | |     .into()
[INFO] [stdout]     | |___________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 405 -     }
[INFO] [stdout] 406 -     .into()
[INFO] [stdout] 405 +     }
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 398 ~     <proc_macro::TokenStream as Into<_>>::into(match &data_struct.fields {
[INFO] [stdout] 399 |         // struct Struct { name: type, name: type }
[INFO] [stdout] ...
[INFO] [stdout] 404 |         Fields::Unit => panic!("#[derive(Serializable)] is not defined for Unit structs!"),
[INFO] [stdout] 405 ~     })
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `proc_macro2::TokenStream`
[INFO] [stdout]    --> src/enums.rs:137:21
[INFO] [stdout]     |
[INFO] [stdout] 137 | /                     quote! {
[INFO] [stdout] 138 | |                         #name::#ident => (#enum_id_counter as #prefix_type).serialize()
[INFO] [stdout] 139 | |                     }
[INFO] [stdout] 140 | |                     .into(),
[INFO] [stdout]     | |___________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `proc_macro2::TokenStream`
[INFO] [stdout]    --> src/enums.rs:142:37
[INFO] [stdout]     |
[INFO] [stdout] 142 |                 variant_parser.push(quote! { Some(#name::#ident) }.into());
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `proc_macro2::TokenStream`
[INFO] [stdout]    --> src/enums.rs:148:37
[INFO] [stdout]     |
[INFO] [stdout] 148 |     let prefix_type: TokenStream2 = prefix_type.into();
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 148 -     let prefix_type: TokenStream2 = prefix_type.into();
[INFO] [stdout] 148 +     let prefix_type: TokenStream2 = prefix_type;
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 148 -     let prefix_type: TokenStream2 = prefix_type.into();
[INFO] [stdout] 148 +     let prefix_type: TokenStream2 = <proc_macro2::TokenStream as Into<_>>::into(prefix_type);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `proc_macro::TokenStream`
[INFO] [stdout]    --> src/structs.rs:398:5
[INFO] [stdout]     |
[INFO] [stdout] 398 | /     match &data_struct.fields {
[INFO] [stdout] 399 | |         // struct Struct { name: type, name: type }
[INFO] [stdout] 400 | |         Fields::Named(fields_named) => impl_serializable_struct_named(fields_named, name),
[INFO] [stdout] ...   |
[INFO] [stdout] 406 | |     .into()
[INFO] [stdout]     | |___________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 405 -     }
[INFO] [stdout] 406 -     .into()
[INFO] [stdout] 405 +     }
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 398 ~     <proc_macro::TokenStream as Into<_>>::into(match &data_struct.fields {
[INFO] [stdout] 399 |         // struct Struct { name: type, name: type }
[INFO] [stdout] ...
[INFO] [stdout] 404 |         Fields::Unit => panic!("#[derive(Serializable)] is not defined for Unit structs!"),
[INFO] [stdout] 405 ~     })
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serial_traits_derive` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `serial_traits_derive` (lib test) due to 4 previous errors
[INFO] [stderr] warning: unused dependency `serial_traits`
[INFO] [stderr]  --> Cargo.toml:7:15
[INFO] [stderr]   |
[INFO] [stderr] 7 | [dependencies.serial_traits]
[INFO] [stderr]   |               ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `serial_traits`
[INFO] [stderr] warning: `serial_traits_derive` (manifest) generated 1 warning
[INFO] running `Command { std: "docker" "inspect" "abf29e44424104662070da2c95edfb866297fa2b00277e41028effd17b6c03e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abf29e44424104662070da2c95edfb866297fa2b00277e41028effd17b6c03e0", kill_on_drop: false }`
[INFO] [stdout] abf29e44424104662070da2c95edfb866297fa2b00277e41028effd17b6c03e0
